Master

Satellite Max. 31 satellites

Satellite

One of the satellites may be used as a back-up master.
The additional RAM board, UP-S04MB2, must be installed in the master and, if possible, in each satellite.

1 Inline Operation

1. Message display
(1) Message displayed during inline communication
1)The message as shown below is displayed at the master which is engaged in IRC transmission. ex.:

SENDING DATA

The above message is also displayed at the satellite which is engaged in transmission for system resetting.
2)The machine number of the satellite communicating with the master is displayed at the master after the start of IRC transmission. ex.:

000022

In this case, the machine number of the satellite is 000022.

(2) Error messages

If an error occurs, a corresponding error message is displayed. To clear an error message, press the L key. For error messages, see the table below. List of error messages
Error messages (Default) RETRY BUSY CODE NOT FREE LACKING MEMORY LINE ERROR MOTOR LOCK NO AUTHORITY NON RESET BACKUP DOWN? MASTER DOWN? OFF LINE POWER OFF T-LOG FULL TYPE ERROR UNDEFINED CODE ENTRY ERROR Description This message prompts you to retry communication with the machine which you have failed to communicate. The target machine is busy. The specified clerk has signed on at another machine. The entered GLU code is in use. The GLU code or related file memory is not enough. Transmission error The remote printer did not operate correctly. The clerk who entered a GLU code are not authorized. IRC initial downloading before resetting The back-up master doesn't reply to the request. The master doesn't reply to the request. Remote printer off-line error The target machine is turned off. T-LOG buffer is full. The file in the master and that in the satellite are not of the same type. The specified clerk code is not present in the master list. The entered GLU code is not listed. The entry made is not valid.
2. Open store operation (OPXZ mode) master and satellite

The PLU/EAN file (INITIAL D/L and MAINTENANCE D/L) does not include stock data. The OPTION file includes the following data: Optional feature preset, EAN deletion term, scale preset, happy hour, zero skip, general report format, trans. report format, clerk report format, hourly report, stacked report, drawer alarm, screen save time, customer control program, bonus point, bonus point redemption table and auto key preset data. The MESSAGE file includes the following data: Logo text, dept. group text, PLU group text, currency descriptor, VP text, slip text, slip footer, payee name, Entertainment bill message, PLU hourly group text, scrolling message for pole display, working time shift text and free text. The DEVICE CONFIG file includes the following data: Journal printer, receipt printer, slip printer, report printer and kitchen printer#1-#9. The PLU/EAN file (INITIAL D/L and MAINTENANCE D/L) includes LINK PLU preset data. Initial downloading of all preset data (ALL PGM) should not be performed when totals exist in the system. (The totalizers of the receiving satellite are cleared.) Performing individual initial D/L jobs will result in a non-reset error when sales data exists in the satellite.
9. Look-up and updating of the GLU file
In the IRC system, the following two types of GLU file allocation system are available: a centralized system and an individual system. In choosing the type of GLU file system, please consult your authorized SHARP dealer.
(1) Centralized GLU file system
In this system, the GLU file exists only in the master. All satellites in the IRC system can access the GLU file in the master for registration. The GLU file is accessed by satellites for the following purposes: New order or reorder Payment entry or temporary finalization Bill printing Slip printing Bill transfer/bill totalizing Bill separating Customer ordering There are two types of GLU data transmission. 1) The GLU data is transmitted from the master to a satellite for GLU file look up (in case of a new order/reorder). In this case, the GLU reserve counter* is retained at the master. * The reserve counter reserves some records of GLU files to prevent a LACKING MEMORY error in finalization. 2) The GLU data is transmitted from a satellite to the master upon finalization of a transaction (in case of payment entry or temporary finalization). The data transmitted from the satellite is once saved in the temporary GLU data receiving file and then updated in the GLU file of the master. In this case, the GLU reserve counter is cleared at the master. If a satellite looks up the GLU file in the master or asks the master to update the file, the backup master performs the same process as the master.
(2) Individual GLU file system
In this system, the master and satellites have their own GLU files and look up them for registration. Therefore, no inline communications are made regarding GLU data.

10. PLU/EAN stock control
In the IRC system, the following two systems for PLU/EAN stock control are available: a centralized system and an individual system. In choosing the type of PLU/EAN stock control system, please consult your authorized SHARP dealer. Centralized system Preset stock data is stored only in the master. Stock data in each satellite must be zero before a PLU/EAN entry is made. When a consolidated report is generated, stock data in respective satellites is consolidated into the stock file in the master and calculated there. The stock data calculated at the master is displayed or printed out and the stock data in each satellite is reset to zero at the same time. Individual system The master and satellites store their own preset stock data. When a consolidated report is generated, the stock data in the master and satellites is consolidated and displayed or printed out.
In the individual system, the consolidation does not affect the stock data in the master.

11. T-LOG polling

All REG-mode transaction data in each satellite is saved in its T-LOG buffer. T-LOG polling is a data collecting system in which the master collects data from the T-LOG buffers in satellites. A request for T-LOG polling is issued from the satellite to the master when the number of data records in its T-LOG buffer exceeds a predetermined number. As the master detects such a request, it starts collecting T-LOG buffer data. After collecting data from one satellite, the master waits for a preset time and starts collecting data from another satellite. In T-LOG polling, the data transmitted to the master is stored in the corresponding file. The data flow in T-LOG polling is shown below.

Satellite A

Satellite B

Satellite C

Satellite D
Polling sequence (see the figure above.) (1) Satellite A makes a request for polling. (2) The master detects the request and starts collecting T-LOG data from satellite A. (3) The T-LOG data is sent to the master. (4) After receiving T-LOG data from satellite A, the master waits for a preset time. (5) The master detects a request from another satellite (B, C or D) and starts polling for it. You can specify in the PGM2 mode whether the entry function of a satellite is disabled (LOCK) or enabled (CONTINUE) when the T-LOG buffer is full. If it is disabled, an error message T-LOG FULL will be displayed and you are not allowed to make any entry in the REG/MGR mode at the satellite. If it is enabled, you can continue entries but cannot save the entered data. Even if data is entered after the T-LOG buffer becomes full, the previous data saved in the file will not be erased.

If the T-LOG buffer becomes nearly full, an alarm message pattern appears on the display of the satellite. For the programming whether or not to lock a registration entry when the T-LOG file is full, see the Function selection 2 of Optional Feature Selection section of the UP-820F/UP-820N Instruction Manual. For the T-LOG polling between the master and MWS, please consult your authorized SHARP dealer.

12. PLU/EAN data control

In the IRC system, the following two systems for PLU/EAN data control are available: a centralized system and an individual system. In choosing the type of PLU/EAN data control system, please consult your authorized SHARP dealer. Centralized system PLU/EAN sales data is centrally controlled by the master. PLU/EAN sales data which is temporarily stored in the T-LOG buffer of a satellite is sent to the master by T-LOG polling. Individual system The master and satellites control their own PLU/EAN sales data. PLU/EAN sales reports can be individually generated at each machine. Consolidation of PLU/EAN sales data can be achieved by generating the consolidated PLU/EAN report at the master.
The learning function enables the operator at a satellite to set the unit price, associated department and deletion/non-deletion choice for an item whose code is undefined in the PLU/EAN file, and to register the transaction in the training mode. (For further information on the learning function, see the UP-820F/UP-820N Instruction Manual.) If the satellite has no dynamic EAN file, the data on the EAN item which has been set using the learning function is stored in the PLU/EAN main file to update the file. If the satellite has a dynamic EAN file, the data is stored in the dynamic EAN file to update the file. The data which has been set using the learning function in the training mode at a satellite is also stored in its T-LOG buffer.
For the data flow, see the following figures. (1) In case that the master and satellites have no dynamic EAN files:

Master Satellite

Registration by the Updating learning function PLU/EAN main file T-LOG polling/updating PLU/EAN main file T-LOG buffer Saving
(2) In case that the master has a dynamic EAN file and satellites don't:
PLU/EAN main file Dynamic EAN file
Updating Updating the PLU/EAN main files of satellites T-LOG polling

Registration by the Updating learning function PLU/EAN main file T-LOG buffer Saving
(3) In case that both the master and satellites have dynamic EAN files:
Updating PLU/EAN main file Dynamic EAN file
Updating the PLU/EAN main files of satellites At this time, all dynamic EAN files in the IRC system are cleared.
Updating PLU/EAN main file Dynamic EAN file T-LOG buffer
Registration by the learning function

Saving

T-LOG polling
13. Price change function
When the price for an PLU/EAN item is changed at a machine (master or satellite), its PLU/EAN main file or dynamic PLU/EAN file is updated by the new price data (unit price and associated department). Immediately after this, the new data is automatically distributed to all other machines to update the PLU/EAN main files or dynamic PLU/EAN files which contain the code of the item. The data on an EAN item whose price has been changed at a satellite is also stored in the T-LOG buffer of the satellite. The data stored in the T-LOG buffer is collected by T-LOG polling at the master to update its PLU/EAN main file or dynamic EAN file. For further information on the price change function, see the UP-820F/UP-820N instruction manual. For the data flow, see the following figures. In case that the price is changed at the master:
Registration by the price change function
PLU/EAN main file Dynamic EAN file Automatic distribution of updating data to all satellites
PLU/EAN main file Dynamic EAN file T-LOG buffer
In case that the price is changed at a satellite:
Automatic distribution of updating data to the master and all other satellites PLU/EAN main file Dynamic EAN file T-LOG polling and updating PLU/EAN main file Dynamic EAN file

Updating

Price change data (unit prices and associated departments)

Saving T-LOG buffer

If a transmission error occurs during automatic distribution of updated data to other machines after a price is changed using the price change function at a machine, the machine number of the terminal which causes the error and the type of error are printed out at the sending machine. In this case, the system retry function can be used if it is enabled. (For the system retry function, see page 6364.)

14. Customer data control
In the IRC system, customer data is centrally controlled by the master. Customer data which is temporarily stored in the T-LOG buffer of a satellite is sent to the master by T-LOG polling and controlled by the master. (For further information on T-LOG polling, see page 19.)
15. Communication with a remote printer (option)
When a remote printer is included in the inline system, order data is output to the remote printer according to the remote printer assignment. The remote printer, also called a kitchen printer, is used to print all or part of the data entered at a machine. Although kitchen may be one of the typical settings for the convenient use of the remote printer, it can also be used at any location. If a remote printer is assigned to a department or PLU, the information on the department or PLU is output to the remote printer when the or f key is pressed or the transaction is finalized at a terminal. The data which can be output to a remote printer is as follows: 1) Item text 2) Quantity* 3) Unit prince*/Price* 4) Amount* 5) PLU/department code* 6) Free text* 7) Number of guests* * Whether to print or not is selectable. Second (back-up) remote printer A second remote printer can be assigned to each remote printer for automatic back-up. If an error occurs during data output to a remote printer, the data is output to the second remote printer assigned to it. If an error occurs during data output to the second remote printer, the data is output to the receipt printer of the terminal. Up to two remote printers can be preset to print data on each item (PLU or department). If two printers are preset to print data on each item, the data is simultaneously output to both printers. If either of these printers encounters an error, the data is output to its backup printer. If the backup printer encounters an error, a receipt is printed.
For the programming of remote printers, see pages 4750. Crate entry is not output to a remote printer.

16. Rerouting print data

In restaurants or the like, every terminal does not need an external printer (a bill printer, a validation printer or a kitchin printer). One external printer connected by an RS-232 cable can be shared by two or more UP-820F/UP-820N machines. Print data rerouting chart

Rerouting data flow

Print data (1) UP-820F/UP-820N External printer
Print data (1) UP-820F/UP-820N

Ordinary data flow

Print data (2) UP-820F/UP-820N External printer
Rerouting data to the built-in printer chart
UP-820F/UP-820N Out put to built-in printer
via LAN UP-820F/UP-820N via RS-232 cable
2 Consolidated and Individual Reports
The system can generate two types of sales reports: consolidated reports (reports on all or specified machines in the system) and individual reports (reports on individual machines). At the master, you can generate consolidated reports on all or specified satellites and reports on the master itself. At each satellite, you can generate reports on the satellite.

1. Operating modes

X1/Z1 mode: Daily sales reading (X1) and resetting (Z1) reports X2/Z2 mode: Periodic consolidation reading (X2) and resetting (Z2) reports OPXZ mode: Individual clerk/cashier daily sales reading (X) and resetting (Z) reports
2. Consolidated reports master/back-up master
(1) Report generation procedure
To generate various reports, use the following procedure, referring to the list of consolidated reports on the following pages.
1. Enter the required operating mode (OPXZ, X1/Z1 or X2/Z2)
from the mode selection window.
2. Select SYSTEM READING or SYSTEM RESETTING depending on your need, and press the e key.
3. Select the type of report you wish to generate and press the e key or enter the corresponding report type No.(2-digit)
shown on the display. By selecting an item with parentheses on the opening screen and pressing the e key, you can jump to the pertinent report list. (If the desired type of report is not listed on the display, you can scroll up or down the screen with the scroll keys.)
4. If you need to enter data to generate a report, follow the
instructions given on the display for entry. The MACHINE No. window will appear.
5. If you wish to generate a report on all the machines in the system, select ALL and press the e key. If you wish to
generate a report on specific machines, select MACHINE SELECT and press the e key. In this case, the MACHINE SELECT window will open. Move the cursor to the machine number, select YES, and press the c key. The OUTPUT TO window will appear.
6. Select DISPLAY or REPORT PRINTER and press the e
(2) List of consolidated reports (SYSTEM READING/RESETTING)
Report type GENERAL <DEPARTMENT> DEPT. /GROUP Department by group report X1 X2 Department code (The range can be specified by entering start and end codes.) DEPT. IND. GROUP DEPT. GROUP TOTAL <PLU> PLU PLU/EAN sales report by specified range PLU PICKUP COMBO SALES PLU/EAN pickup report Combo sales report X1,Z1 X2,Z2 PLU/EAN code (The range can be specified by entering start and end codes.) X1,Z1 X2,Z2 PLU/EAN code pickup X1 X2 PLU code (The range can be specified by entering start and end codes.) COMBO PICKUP PLU BY DEPT. PLU IND. GROUP PLU GROUP TOTAL PLU STOCK Combo sales pickup report PLU/EAN report by associated dept. PLU/EAN individual group report PLU/EAN group total report PLU/EAN stock report X1 X1 X1 X1 X2 X2 X2 PLU/EAN code (The range can be specified by entering start and end codes.) PLU STOCK PICKUP PLU TOP 20 PLU/EAN stock pickup report PLU/EAN top 20 sales report by sales amount PLU/EAN top 20 sales report by sales quantity PLU ZERO SALES PLU/EAN zero sales report PLU/EAN zero sales report by associated dept. PLU MINIMUM STOCK PLU/EAN minimum stock report X1 PLU/EAN code (The range can be specified by entering start and end codes.) PLU PRICE CATEGORY PLU/EAN sales report by price category PLU HOURLY GROUP <TRANSACTION> TRANSACTION TL-ID COMMISSION SALES TAX CHIEF Transaction report Total-in-drawer report Commission sales report Tax report Chief report X1 X1 X1 X1 X1 X2 X2 X2 X2 PLU/EAN hourly group report X1,Z1 Time range X1 X2 PLU/EAN price category X1 X1 X2 X2 Department code X1 X2 X1 X1 X2 PLU/EAN code pickup PLU/EAN code pickup PLU/EAN group no. X1,Z1 X2,Z2 Department code Individual department group report Department group total report X1 X1 X2 X2 Department group no. (1 to 17) Description General report Operating modes OPXZ X1/Z1 X2/Z2 X1,Z1 X2,Z2 Required data/Remarks

1. Enter the X1/Z1 or X2/Z2 mode from the mode selection

window.

2. Select RESET CLEAR and press the e key.
The MACHINE No. window will appear.
3. If you wish to unlock all the machines in the system, select ALL and press the e key. If you wish to unlock specific machines, select MACHINE SELECT and press the e
key. In this case, the MACHINE SELECT window will open. Move the cursor to the corresponding machine number(s), select YES, and press the c key.

3 IRC Programming

To start IRC programming, first, turn on the machines in the IRC system and put them in the PGM2 mode. The programming procedures for both the master and satellites will be explained below. For the setup of your IRC system, please be sure to consult your authorized SHARP dealer.
1. Setting the machine numbers master and satellite
It is necessary to assign machine numbers to the master and satellites before programming.
1. Enter the PGM2 mode from the mode selection window. 2. Select SETTING and press the e key.
The SETTING window will appear.
3. Select TERMINAL and press the e key.
The TERMINAL window will appear.
4. Move the cursor to the MACHINE# line. Enter a machine number and press the c key.
Machine number: up to 6 digits (0999999)
5. Repeat steps 1 to 4 for all machines in the IRC system.
In an IRC network, each machine number must be unique. Do not use the same number for two or more machines. Be sure to set up satellites first to allow the downloading of inline preset from the master to satellites.
2. Setting the terminal numbers (IRC machine numbers) for satellites
For the setup of your IRC system, please be sure to consult your authorized SHARP dealer. It is assumed that your IRC terminals have been set for inline operations.
The INLINE CONFIG window will appear.
4. Move the cursor to the IP ADDRESS 4 line.
Enter a terminal number (0254) and press the c key.
(For programming for the SYSTEM RETRY function and the LOOKUP ORDER, see pages 4344.)
Terminal numbers must be assigned to the master and each satellite in the IRC system. (For setting the masters terminal number, see the next paragraph.) If an IRC network contains two or more machines with the same terminal number, IRC communications will not be achieved correctly. Each terminal number must be unique. The terminal number should be in the range from 1 to 254. If the terminal number 000 is programmed for a machine, it is put in the OFF LINE mode and cannot take part in IRC communications.
3. Initial setting for the master and master list creating/updating
For the setup of your IRC system, please be sure to consult your authorized SHARP dealer.

(1) Setting the terminal number for the master and creating the master list
A master list can only be created on the pre-designated master.
4. Enter a terminal number (0254) for the master in the IP
ADDRESS 4 line and carry out the programming for BMA MACHINE No.*, the SYSTEM RETRY function*, and LOOKUP ORDER* and press the e key. The MASTER LIST window will appear. (*For programming for BMA MACHINE No., the SYSTEM RETRY function and LOOKUP ORDER, see pages 4244.)
5. Enter the terminal number (1254) for a machine in the IRC system and press the e key.
The machine number line will appear.
6. Enter the machine number (1999999) of the machine and press the e key.
7. Repeat steps 5 to 6 for all machines in the IRC system. Press the c key to complete the master list.
The terminal numbers and machine numbers of the master and satellites must be entered into the master list for IRC communications. The terminal numbers and machine numbers of up to 32 machines (one master and 31 satellites) can be entered into the master list. The terminal number should be in the range from 1 to 254 and the machine number from 1 to 999999. No satellite can perform inline communications unless its terminal and machine numbers are present in the master list. If a machine number which already exists in the master list is entered, an entry error will occur even when the corresponding terminal number does not exist in the list. Even if a set of terminal and machine numbers that exists in the master list is entered, no error will occur (the list will remain unchanged.)
(2) Deleting a machine from the master list
To delete a terminal number from the master list, proceed as follows: 1. Enter the PGM2 mode from the mode selection window. 2. Select SETTING in the PGM2 mode and press the e key. The SETTING window will appear. 3. Select INLINE CONFIG and press the e key. The INLINE CONFIG window will appear. 4. Press the c key. The MASTER LIST window will appear. 5. Enter the terminal number to be deleted and press the D key. 6. The machine will ask you as follows: ARE YOU SURE? If you are sure to delete it, select YES. If not, select NO. 7. Press the c key to complete the master list.
You can delete any of the terminal numbers that are in the master list. Deleting the master from the master list will inhibit all requests of the satellites from being sent.

Enter the time-out time (1-255 (sec)) and press the c key.
This value (time-out value) will depend upon the application. Please consult your authorized SHARP dealer.
(3) Programming of the gateway number
The gateway number can be specified by the following procedure:
4. Move the cursor to the G.W. ADDR. 4 line.
Enter the gateway number (0-254) and press the c key.
Entering a terminal number of the machine itself results in ENTRY ERROR. Entering a same number as pre-entered number in the IP ADDRESS4 line results in ENTRY ERROR.
10. Reading the contents of the Manager Work Station (MWS) programming master and satellite
4. Select DISPLAY or REPORT PRINTER and press the e
Terminal No. Time-out time (7 sec) GATEWAY No.

4 System Back-Up

1. How the IRC back-up system works
The IRC system incorporates a back-up system. One of the satellites can be designated to serve as a back-up master. For the setup of a back-up master in your IRC system, please consult your authorized SHARP dealer. When both the master and back-up master are in order, the system works in the following sequence:

Master Back-up master

1) Updated data

3) Updated data

2) Acknowledgment signal

4) Acknowledgment signal

1) Each satellite sends updated GLU data (and clerk data*) to the master. 2) The master receives the data and sends back an acknowledgment signal to the satellite. 3) The satellite sends the updated data to the back-up master. 4) The back-up master receives the data and sends back an acknowledgment signal to the satellite. *Only for the centralized clerk file system If the master breaks down, the back-up master serves as the master after a master declaration is made at the back-up master. If the back-up master breaks down, updated data transmission to it can be stopped by a master declaration at the master. When the master or back-up master recovers from the breakdown, it resumes its function as the master or back-up master by the recovery declaring operation.

2. Master declaration

When the master or back-up master breaks down, the master declaration procedure should be taken to inform satellites of the breakdown.

(1) When the master recovers from a breakdown Recovery declaration at the back-up master
Flow of a recovery declaration at the back-up master
Master 1) Recovery declaration operation 3) Updated data file Back-up master
Satellite 5) Restart of updated data transmission 4) Master recovery information 2) Transmission stops temporarily.

Recovery declaration

1) The recovery declaration operation is done at the back-up master. 2) Each satellite stops sending updated GLU data (and clerk data*) to the back-up master temporarily. 3) The back-up master sends the updated GLU data (and clerk data*) files to the master. 4) The back-up master informs all satellites of the master's recovery. 5) The satellites restart sending updated GLU data (and clerk data*) to the master and the IRC system returns to the normal state. *Only for the centralized clerk file system
The recovery declaration procedure is as follows:
3. Select RECOVER DECLARE and press the e key.
(2) When the back-up master recovers from a breakdown Recovery declaration at the master
Flow of a recovery declaration at the master
Master 3) Updated data file 1) Recovery declaration Back-up master
4) Back-up master recovery information
2) Transmission stops temporarily. 5) Restart of updated data transmission
1) The recovery declaration operation is done at the master. 2) Each satellite stops sending updated GLU data (and clerk data*) to the master temporarily. 3) The master sends the updated GLU data (and clerk data*) files to the back-up master. 4) The master informs all satellites of the back-up master's recovery. 5) The satellites restart sending updated GLU data (and clerk data*) to the back-up master and the IRC system returns to the normal state. *Only for the centralized clerk file system The recovery declaration procedure is the same as (1) When the master recovers from a breakdown.

5 Error Recovery

1. Manual clear operation
With the manual clear operation, you can clear various item memories when necessary. This operation should be done only when the master or system breaks down.
(1) Manual clearing procedure
In case of trouble, you can compulsively clear item memories causing the trouble and restore your system using the following procedure, Clearing procedure

1. Enter the PGM2 mode from the mode selection window. 2. Select DATA CLEAR and press the e key.
The DATA CLEAR window will appear.
3. Referring to the list on the next page, select the corresponding item and press the e key.
The above-mentioned manual clearing jobs should be performed at the advice of your authorized SHARP dealer.
(2) List of manual clearing items
Item SIGN ON FLAG GLU USED FLAG TRANSACTION Description Manual clearing of the clerk sign-on state Manual clearing of the GLU data in use state Manual clearing of the GENERAL (dept. and transaction) data memory HOURLY CLERK CASHIER DAILY NET T-LOG E. JOURNAL Manual clearing of the hourly sales data memory Manual clearing of the clerk sales data memory Manual clearing of the cashier sales data memory Manual clearing of the daily net sales data memory Manual clearing of the T-LOG buffer Manual clearing of the electronic journal data *1 M denotes manual clearing functions available at the master while S denotes manual clearing functions available at satellites. *2 Clerk sales data for each satellite at which a clerk signs on is not collected by manual clearing of the sign-on state. Clerk sales data is collected only when sign-off operation is done correctly at satellites. M S M S For T-LOG polling, see page 19. M S M S Only for the clerk + cashier system. M S M S M S M Terminal*1 Master(M) M Satellite(S) Effective only for clerks who is in the sign-on state at the master. (*2) This operation clears all GLU data that is currently in use. Remarks

2. System retry function

If a transmission job from the master to a satellite is not performed successfully, the master either terminates the job immediately or awaits a command given through the keyboard, depending on whether the system retry function is disabled or enabled. When the system retry function is enabled, the master awaits entry of a command and retries access depending on the commands as explained on the following page. System retry function is also available at satellites depending on a transmission error. This function is used in the following cases: The master has failed to download preset or updated data to all or some of the satellites. The master has failed to collect sales report data from all or some of the satellites. The satellite has failed to download data to other machines. A clerk has failed to sign off at a satellite.* Whether the system retry function is enabled or disabled when a transmission error occurs is programmed both at the master and a satellite. (See 5. Specifying whether to enable or disable the system retry function when a transmission error occurs on page 43.) *When a clerk has failed to sign off at a satellite for some reason (e.g. the master is busy), the RETRY and ABORT commands are available but the IGNORE command is not.