Power analyzers and Energy Meters Power Analyzer Type WM14-DIN
Class 2 (active energy) Class 3 (reactive energy) Accuracy 0.5 F.S. (current/voltage) Power analyzer Display of instantaneous variables: 3x3 digit Display of energies: 8+1 digit System variables and phase measurements: W, Wdmd, var, VA, VAdmd, PF, V, A, An, Admd, Hz Amax, Admd max, Wdmd max indication Energy measurements: kWh and kvarh Hour counter (5+2 DGT) TRMS meas. of distorted sine waves (voltages/currents) Power supply: 24V, 48V, 115V, 230V, 50-60Hz; 18 to 60VDC Protection degree (front): IP40 Front dimensions: 107.8x90mm
Optional RS422/485 serial port Alarms (visual only) VLN, An

Product Description

3-phase power analyzer with built-in programming keypad. Particularly recommended for displaying the main electrical variables. Housing for DIN-rail mounting, (front) protection degree IP40 as standard, and optional RS485 serial port.

How to order

Model Range code System Power supply Option

WM14-DIN AVD XX

Type Selection
Range codes AV5: 400/660VL-L/5(6)AAC VL-N: 185 V to 460 V VL-L: 320 V to 800 V AV6: 100/208VL-L/5(6)AAC VL-N: 45 V to 145 V VL-L: 78 V to 250 V Phase current: 0.03A to 6A Neutral current: 0.09 to 6A System 3: 1-2-3-phase, balanced/unbalanced load, with or without neutral Power supply A: B: C: D: 3: 24VAC -15+10%, 50-60Hz 48VAC -15+10%, 50-60Hz 115VAC -15+10%, 50-60Hz 230VAC -15+10%, 50-60Hz 18 to 60VDC Options X: S: None RS485 port

Input specifications

Rated inputs Current Voltage Accuracy (display, RS485) (@25C 5C, R.H. 60%) Current Neutral current Phase-phase voltage Phase-neutral voltage Active and Apparent power, Reactive power Active energy Reactive energy Frequency Additional errors Humidity Temperature drift 3 (shunt) 4 with CT=1 and VT=1 AV5: 1150W-VA-var, FS:230VLN, 400VLL; AV6: 285W-VA-var, FS:57VLN, 100VLL 0.25 to 6A: (0.5% FS +1DGT) 0.03A to 0.25A: 7DGT 0.25 to 6A: (1.5% FS +1DGT) 0.09A to 0.25A: 7DGT (1.5% FS +1 DGT) (0.5% FS + 1 DGT) 0.25 to 6A: (1% FS +1DGT); 0.03A to 0.25A: (1% FS +5DGT) 0.25 to 6A: (2% FS +1DGT); 0.03A to 0.25A: (2% FS +5DGT) Class 2 (I start up: 30mA) Class 3 (I start up: 30mA) 0.1%Hz (48 to 62Hz) 0.3% FS, 60% to 90% RH 200ppm/C
Sampling rate Display refresh time Display Type Read-out for instant. var. Read-out for energies Read-out for hour counter Measurements
1400 samples/s @ 50Hz 1700 samples/s @ 60Hz 700ms LED, 9mm 3x3 DGT 3+3+3 DGT (Max indication: 99.9) 1+3+3 DGT (Max. indication: 9.99) Current, voltage, power, power factor, frequency, energy, TRMS measurement of distorted waves. Direct < 3, max 10A peak 1 M 5% 453 K 5% 0.to 62 Hz 1.2 F.S. 2 Un/36A
Coupling type Crest factor Input impedance 400/660VL-L (AV5) 100/208VL-L (AV6) Current Frequency Overload protection Continuos voltage/current For 500ms: voltge/current
Specifications are subject to change without notice

WM14-DINDS0904

WM14-DIN
RS485 Serial Port Specifications
RS422/RS485 (on request) Type Connections Addresses Protocol Multidrop bidirectional (static and dynamic variables) 2 or 4 wires, max. distance 1200m, termination directly on the instrument 1 to 255, key-pad selectable MODBUS/JBUS Data (bidirectional) Dynamic (reading only) Static (writing only) Data format Baud-rate System, phase variables and energies All configuration parameters 1 bit di start , 8 data bit, no parity, 1 stop bit 9600 bit/s

Software functions

Password 1st level 2nd level System selection Numeric code of max. 3 digits; 2 protection levels of the programming data Password 0, no protection Password from 1 to 999, all data are protected 3-phase with or without n, unbal. 3-phase balanced 3-phase ARON, unbalanced 2-phase Single phase 1 to 999 1.0 to 99.to 99.9% of the input electrical scale 1 to 16 Measurements, alarms, serial out. (fundamental var: V, A, W and their derived ones). Up to 3 variables per page Page 1: V L1, V L2, V L3 Page 2: V L12, V L23, V L31 Page 3: A L1, A L2, A L3 Alarms Page 4: A L1 dmd, A L2 dmd, A L3 dmd Page 5: An Page 6: W L1, W L2, W L3 Page 7: PF L1, PF L2, PF L3 Page 8: var L1, var L2, var L3 Page 9: VA L1, VA L2, VA L3 Page 10: VA , W , var Page 11: VA dmd, W dmd, Hz Page 12: W dmd max Page 13: Wh Page 14: varh Page 15: VL-L , PF VLN Alarm Page 16: A max Page 17: A dmd max Page 18: hours Programmable, for the VL and An (neutral current). Note: the alarm is only visual, by means of LED on the front of the instrument. Independent alarm (VL, An) max: A dmd, W dmd all energies (Wh, varh)

Transformer ratio CT VT Filter Operating range Filtering coefficient Filter action
Displaying 3-phase system with neutral
Power Supply Specifications
Auxiliary power supply 230VAC -15 +10%, 50-60Hz 115VAC -15 +10%, 50-60Hz 48VAC -15 +10%, 50-60Hz 24VAC -15 +10%, 50-60Hz 18 to 60VDC AC: 4.5 VA DC: 4W

Power consumption

General Specifications
Operating temperature Storage temperature Installation category Insulation (for 1 minute) 0 to +50C (32 to 122F)
(RH < 90% non condensing)

-10 to +60C (14 to 140F)

(RH < 90% non condensing at)
Cat. III (IEC 60664, EN60664) 4000VAC, 500VDC between mesuring inputs and power supply. 500VAC/DC between
Dielectric strength EMC Emissions
mesuring inputs and RS485. 4000VAC, 500VDC between power supply and RSVAC (for 1 min) EN50084-1 (class A) residential environment, commerce and light industry
General Specifications (cont.)
Immunity Pulse voltage (1.2/50s) Safety standards Approvals Connections 5(6) A Max cable cross sect. area Housing Dimensions (WxHxD) EN61000-6-2 (class A) industrial environment. EN61000-4-5 IEC60664, EN60664 CE, UL and CSA Screw-type 2.5 mm2 107.8 x 90 x 64.5 mm Material Mounting Protection degree Weight ABS self-extinguishing: UL 94 V-0 Panel Front: IP40 (standard) Connections: IP20 Approx. 400 g (pack. incl.)

Display pages

Display variables in 3-phase systems (in a 3-phase system with neutral) No 1st variable 2nd variable 3rd variable 1 V L1 V L2 V LV L12 V L23 V L18 A L1 A L1 dmd An W L1 PF L1 var L1 VA L1 VA system VA dmd (system) Wh (MSD) varh (MSD) V LL system A MAX A dmd max h A L2 A L2 dmd AL.n W L2 PF L2 var L2 VA L2 W system W dmd (system) W dmd MAX Wh varh AL.U W L3 PF L3 var L3 VA L3 var system Hz (system) Wh (LSD) varh (LSD) PF system A L3 A L3 dmd Note Decimal point blinking on the right of the display dmd = demand (integration time selectable from 1 to 30 minutes) AL.n if neutral current alarm is active Decimal point blinking on the right of the display if generated power Decimal point blinking on the right of the display if generated power
dmd = demand (integration time selectable from 1 to 30 minutes) Maximum sys power demand The total indication is given in max 3 groups of 3 digits. The total indication is given in max 3 groups of 3 digits. AL.U= is activated only if one of VLN is not within the set limits. max. current among the three phases max. dmd current among the three phases hour counter
MSD: most significant digit LSD: least significant digit
1) Example of kWh visualization: This example is showing 453.7 kWh
2) Example of kvarh visualization: This example is showing 944.9 kvarh
Waveform of the signals that can be measured
Figure A Sine wave, undistorted Fundamental content 100% Harmonic content 0% 1.1107 | A | Arms =

Figure B Sine wave, indented Fundamental content 10.100% Harmonic content 0.90% Frequency spectrum: 3rd to 16th harmonic Additional error: <1% FS
Figure C Sine wave, distorted Fundamental content 70.90% Harmonic content 10.30% Frequency spectrum: 3rd to 16th harmonic Additional error: <0.5% FS

Accuracy

Wh, acuracy (RDG) depending on the current Error

+4% +6%

varh, accuracy (RDG) depending on the current Error +3% 0% -3%

+2% 0% -2%

PF=1 PF=L0.5 or C0.8
0.25A (0.05Ib) 0.5A (0.1Ib)

0.5A (0.1Ib) 1A (0.2Ib)

5A (Ib) 5A (Ib)

6A (Imax) 6A (Imax)

sin=1 sin=0.5
0.1A (0.02Ib) 0.25A (0.05Ib)
Accuracy limits (Active energy) 5(6A) Start-up current: 30mA
Accuracy limits (Reactive energy) 5(6A) Start-up current: 30mA
Used calculation formulas
Phase variables Instantaneous effective voltage Instantaneous apparent power 3-phase active power
Instantaneous reactive power Instantaneous active power System variables Equivalent 3-phase voltage

3-phase apparent power

3-phase power factor
Instantaneous power factor
Neutral current Instantaneous effective current 3-phase reactive power An = AL1 + AL2 + AL3
Used calculation formulas (cont.)
Energy metering Where: i = considered phase (L1, L2 or L3) P = active power Q = reactive power t1, t2 = starting and ending time points of consumption recording n = time unit t = time interval between two successive power consumptions n1, n2 = starting and ending discrete time points of consumption recording

Wiring diagrams

Fig. 1 Fig. 2 Fig. 3

CT connection

3CT and 3VT connection

ARON and VT connection

Fig. 4

Fig. 5

Fig. 6

2-phase connection

3-phase load balanced connection

1-phase connection

NOTE: the current inputs can be connected to the lines ONLY by means of current transformers. The direct connection is not allowed.
Specifications are subject to change without notice WM14-DINDS0904

RS485 Serial connection

RS485 serial connection Fig. 7
1-Last instrument 2-1.n Instrument 3-SIU-PC 4-wire connection

Front Panel Description

1. Key-pad To program the configuration parameters and the display of the variables.
Key to enter programming and confirm selections;
Keys to: - programme values; - select functions; - display measuring pages. 2. Display LED-type with alphanumeric indications to: - display configuration parameters; - display all the measured variables.
Dimensions and Panel Cut-out
32,2mm 107,8mm 50,1mm 64,5mm Specifications are subject to change without notice WM14-DINDS0904

108,5mm

CARLO GAVAZZI CONTROLS
WM14 AND CPT BASIC Serial protocol V3 R0
SERIAL COMMUNICATION PROTOCOL WM14-DIN Basic WM14-96 Basic CPT-DIN Basic
Ver. 3 Rev. 0 17th March 2006
Gross Automation (877) 268-3700 www.carlogavazzisales.com sales@grossautomation.com
1 1.1 1.2 1.2.1 2.2 2.3 2.4 2.5 2.6 2.3.1 3.2 3.3 3.4 3.5 3.4.1
COMMUNICATION PROTOCOL....3 INTRODUCTION....3 FUNCTIONS.....3 WIRING DIAGRAMS...4 VARIABLE MAPPING....7 RAM MEMORY MAPPING....7 ALARM MAPPING (READING ONLY)....8 EEPROM MEMORY MAPPING...8 RESET OF THE PEAK VALUES AND OF THE LATCH ALARM..9 RESET OF THE LATCH ALARM ONLY....9 RESET OF THE PEAK VALUES RELEVANT TO THE CURRENTS ONLY.. 10 RESET OF THE ENERGY AND HOUR METERS.. 10 VARIABLE READING.... 11 INTRODUCTION.... 11 READING OF INSTANTANEOUS VARIABLES.... 11 FIRST READING WITH BYTE ORDER INVERTION... 13 READING OF CONFIGURATION PARAMETERS... 13 READING OF ALARM STATE... 14 READING OF C.G.C. INSTRUMENT CODE... 14 CRC CALCULATION.... 15 EXAMPLE OF CRC CALCULATION.... 15

1 COMMUNICATION PROTOCOL

1.1 INTRODUCTION
WM14 and CPT are provided with a RS485 serial interface. The serial communication protocol is MODBUS/JBUS. The data format is fixed: 1 start bit 8 data bit 1 stop bit 9600 baud Parity: none
The host starts the communication, by sending the frame relevant to the query. Each frame is composed of 4 types of information: slave address: it is a number within the range from 1 to 255, which identifies each instrument connected to the network. function code (command): it defines the control type (reading of n words, writing of one word) data field: it defines the function parameters (e.g. address of the word to write, value of this word, etc.) control word (CRC): it is used to detect transmission errors that may occur. The master calculates the CRC after defining address, function number and data field. When the slave receives the query, it stores it in a temporary buffer. After that, the CRC is calculated and compared with the one received. If the two CRC values are the same and the address is correct, the slave carries out the command and then sends back its reply. The frame synchronisation is forced after a minimum time of 3 msec without communicating. 1.2 FUNCTIONS
Three functions are available on WM14 and CPT: Reading of n words (function 03) Reading of n words (function 04) Writing of one word (function 06) (available only for C.G. Controls, except for the reset instructions) Note: The functions 03 and 04 have exactly the same effect. The user is allowed to reset the peak values (Wdmdmax, Amax, Admdmax), the meters (energy meters and hourmeter) and the latch alarm. To carry out the reset a write command must be sent. Pay attention to follow scrupulously the reset instructions and to send the exact frame, because a different write command could modify some calibration parameters, invalidating the accuracy of the measurements.

1.2.1 Query

FUNCTIONS 03 AND 04
Address 1 byte from 1 to 255

Function * 1 byte 04 *

Word address 2 bytes MSB LSB
n of words ** 2 bytes MSB LSB

CRC 2 bytes MSB LSB

* The function code can be either 04 or 03 ** The maximum number of words is 12
Address 1 byte from 1 to 255 Function 1 byte 04 * n bytes 1 byte Values n bytes *** CRC 2 bytes MSB LSB
*** The byte order is LSB-MSB if the dat parameter is A or MSB-LSB if it is b

1.3 1.3.1

WIRING DIAGRAMS FOUR-WIRE CONNECTION

TWO-WIRE CONNECTION

Notes: 1. To avoid errors due to the signal reflections or line coupling, it is necessary to terminate the input of the last instrument on the network, and also the reception of the Host. If this is not enough, it is also possible to bias the Host transmission (in case of 2-wire connection, it is only possible to either terminate or bias the Host, not both). The termination on both the instrument and the host is necessary even in case of point-to-point connection, within short distances. 2. The GND connection is optional if a shielded cable is used. 3. For connections longer than 1000m, a line amplifier is necessary.

TIMING

Timing characteristics of reading function, 4-wires/2-wires connections T response: Max answering time T response: Typical answering time T delay: Minimum time for a new query T null: Max interruption time on the request frame

msec 300ms 40ms 10ms 2ms

1.3.4 1.

APPLICATION NOTES

2. 3. 4.
If an instrument does not answer within the max answering time, it is necessary to repeat the query. If the instrument does not answer after 2 or 3 consecutive queries, it must be considered as not connected, faulty or with wrong address. The same consideration is valid in case of CRC errors or incomplete frames. By entering the programming mode (by pushing the S key) the communication is interrupted. Any data received during the programming mode are ignored. The writing is allowed only for C.G. Controls internal and service use (except for the reset instructions). For the timing calculation, please refer to the following formulae:

Trequest = Treply =

N bit *8 Baud _ rate
N bit * N char Baud _ rate TS = T _ request + T _ response + T _ reply + T _ delay1

TA = TS * N request

TM = (TS + Tdelay 2) * N instruments
Nbit Nchar Nword TS Tdelay1 TA TM Ninstruments Tdelay5+N Word*2 if function 04 o 03, 8 if function 06 Number of words to be read in an instrument Execution time of one reading Minimum time for new query on the same address Data acquiring time from one instrument Monitoring time of all the instruments Number of instruments connected to the network. Minimum time for new query on a different address

2 VARIABLE MAPPING

2.1 RAM MEMORY MAPPING
ADDRESS 0280h 0282h 0284h 0286h 0288h 028Ah 028Ch 028Eh 0290h 0292h 0294h 0296h 0298h 029Ah 029Ch 029Eh 02A0h 02A2h 02A4h

BYTES 2

VARIABLE V L1-N A L1 W L1 V L2-N A L2 W L2 V L3-N A L3 W L3 V L1-L2 V L2-L3 V L3-L1 VL-L A max A n W VA L1 VA L2 VA L3
Type VN A P V A P V A P VC VC VC VC A A P P P P
ADDRESS BYTES VARIABLE 02A6h 2 VA 02A8h 2 var L1 02AAh 2 var L2 02ACh 2 var L3 02AEh 2 var 02B0h 2 W dmd 02B2h 2 VA dmd 02B4h 2 W dmd MAX 02B6h 2 02B8h 2 Hz 02BAh 2 Admdmax 02BCh 1+1 PF L1/PF L2 * 02BEh 1+1 PF L3/ PF * 02C0h 2 A L1 dmd 02C2h 2 A L2 dmd 02C4h 2 A L3 dmd 02C6h 4 kWh 02CAH 4 varh 02CEh 4 Hourmeter
Type P P P P P P P P H A PF PF A A A E E HM
The byte order in each word is depending on the dat parameter (LSB-MSB if dat=A or MSB-LSB if dat=b. Note *: if the dat parameter is A, the word 2BCh contains the PF L1 value on its LSB and the PF L2 value on its MSB (most significant byte); the word 2BEh contains the PF L3 value on its LSB and the PF value on its MSB. If the dat parameter is b, the word 2BCh contains the PF L2 value on its LSB and the PF L1 value on its MSB (most significant byte); the word 2BEh contains the PF value on its LSB and the PF L3 value on its MSB. For each byte related to the power-factor variables, the most significant bit indicates the sign, in the following way: msb=0 L (inductive) type msb=1 C (capacitive) type. 2.1.1 VARIABLE REPRESENTATION
All the variables, except for the PF values, are represented as signed twos complement integers, by using the number of bytes specified in the memory-mapping table. For the correct interpretation, it is necessary to consider also the decimal point and the engineering unit, according to the following table, and multiply the value by the relevant CT (current transformer) and VT (voltage transformer) ratios:

INF VN VC A P P H PF 111.111.1 111.1 1.11 d.p ENG. Unit V V mA W, VA, VAR W, VA, VAR HZ PF
The following variables are not to be multiplied by the CT and the VT ratios:
INF E HM 111.1 11.11 d.p ENG. Unit kWh or kvarh Hours
Note: The format of the single variables is referred to the electrical input of the instrument and it does not depend on the setting of the CT (current transformer) and VT (voltage transformer) ratios. It means that the software which reads the values from the RAM must multiply them by CT and/or VT according to the variable type and then consider the variable format.
ALARM MAPPING (READING ONLY)

ADDRESS 027Eh 027Eh

BYTE 1 1
CONSTANT XXXXXXX1 XXXXXXX0 XXXXXX1X XXXXXX0X
Description Voltage Voltage Current Current alarm alarm alarm alarm ON OFF ON OFF

EEPROM MEMORY MAPPING

BYTES PARAMETER Password Vt_ratio Ct_ratio P_int Filter_rng Filter_coe Address Set_vup Set_vdown Set_an System Reserved A_int dat DESCRIPTION Programming access password Voltage transformer ratio Current transformer ratio Integration period (Wdmd) Filter range Filter coefficient Instrument address Upper voltage threshold Lower voltage threshold Neutral current threshold System type (see 2.3.1) DONT MODIFY Integration period (Admd) Byte order in the words(see 2.3.2) 111 11.111 [minutes] 111 [% f.s.] 111 [V] 111 [V]
ADDRESS 1080h 1082h 1084h 1086h 1088h 108ah 108ch 108eh 1090h 1092h 1094h 1096h 1098h 109Ah

FORMAT

1.11 [A] 111 ===

111 [minutes] 111

Value with voltage transformer ratio = 1 Value with current transformer ratio = 1

SYSTEM CODE

Value 4 3P (*) 3P.n 2P 1P 3P.A System type
(*) NOTE: the 3-phase without neutral selection is only for balanced loads. The current A L2 and A L3 are a copy of A L1 value, even if there is a different current in the relevant input. 2.3.2 BYTE ORDER IN THE DATA WORDS
Value Byte order A (LSB-MSB) b (MSB-LSB)
RESET OF THE PEAK VALUES AND OF THE LATCH ALARM
Pay attention to follow scrupulously the reset instructions and to send the exact frame, because a different write command could modify some calibration parameters, invalidating the accuracy of the measurements. The following frame must be sent to reset Wdmdmax, Amax, Admdmax and the latch alarm: Request frame Address 1 byte From 1 to 255 Answer frame Address 1 byte From 1 to 255

Function 1 byte 06h

Data address 2 byte 33h 00h

Value 2 byte 00h 00h

CRC 2 byte MSB LSB
NOTE: the answer frame is an echo of the request frame, which confirm the execution of the command.
RESET OF THE LATCH ALARM ONLY
Pay attention to follow scrupulously the reset instructions and to send the exact frame, because a different write command could modify some calibration parameters, invalidating the accuracy of the measurements. The following frame must be sent to reset the latch alarm only: Request frame Address 1 byte From 1 to 255
Data address 2 byte 33h 01h
Answer frame Address 1 byte From 1 to 255
RESET OF THE PEAK VALUES RELEVANT TO THE CURRENTS ONLY
Pay attention to follow scrupulously the reset instructions and to send the exact frame, because a different write command could modify some calibration parameters, invalidating the accuracy of the measurements. The following frame must be sent to reset Amax and Admdmax: Request frame Address 1 byte From 1 to 255 Answer frame Address 1 byte From 1 to 255
Data address 2 byte 33h 02h
RESET OF THE ENERGY AND HOUR METERS
Pay attention to follow scrupulously the reset instructions and to send the exact frame, because a different write command could modify some calibration parameters, invalidating the accuracy of the measurements. The following frame must be sent to reset the energy (kWh and kvarh) and hour meters: Request frame Address 1 byte From 1 to 255 Answer frame Address 1 byte From 1 to 255
Data address 2 byte 33h 03h

3 VARIABLE READING

3.1 INTRODUCTION
WM14 and CPT allow reading up to 12 consecutive words. A reading access is always possible: if the query is related to a non-existing variable, WM14/CPT replies with non-significant values. The field Word address in the request frame must be exactly the physical memory address (not the register number). During n-words reading, the answer contains the exact memory image. This means that the first byte is the content of the memory address specified in the request frame. The following bytes are the contents of the following addresses.
READING OF INSTANTANEOUS VARIABLES
To read all the variables, it is necessary to carry out at least four reading instructions as indicated below. If the values of current ratio and/or voltage ratio are different from 1, A, V and P values shall be calculated after the reading by multiplying the relevant values for CT and VT. The examples in this paragraph 3.2.x are valid when considering dat = A. 3.2.1 FIRST READING (FROM ADDRESS 0280H TO 0297H)

Request (8bytes)

0 C F0 5F

Answer (29 bytes)

8 DF 5 C5 6F DB 5 9C 6F D4B 6F BF 0 BF 0 BF 0 CRC CRC
Example of interpretation
Variable V L1-N A L1 W L1 V L2-N A L2 W L2 V L3-N A L3 W L3 V L1-L2 V L3-L1 V L2-L3 Value read(h) 0898 05DF 6FC05DB 6F9C 0897 05D9 6F4B 00BF 00BF 00BF Value converted (d) Value formatted 220,0V 1,503A 2861W 219,9V 149,9A 2857W 219,9V 1,497A 2849W 191V 191V 191V
SECOND READING (FROM ADDRESS 0298H TO 02AFH)

Request (8 bytes)

0 C 70 6B
18 BF 0 EEF C E3 C E3 C B7B 13 CRC CRC
Variable VL-L A max A n W VA L1 VA L2 VA L3 VA var L1 var L2 var L3 var Value read(h) 00BF 05E2180 0CEF 0CE3 0CE3 26B4 067B 1362 Value converted (d) Value formatted 191V 1,508A 0A 8576W 3311VA 3299VA 3299VA 9908VA 1659var 1649var 1654var 4926var
THIRD READING (FROM ADDRESS 02B0H TO 02BFH)

2 B8 F1 A0

Answer (21 bytes)
10 5A 21 8A 0 FDB 57 CRC CRC
Variable W dmd VA dmd W dmd max Hz A dmd max PF L1 PF L2 PF L3 PF Value read (h) 215A 268A 2182 01F5 05DB Value converted (d) 87 Value formatted 8538W 9866VA 8578W 50,1HZ 1,499A L.87 L.87 L.87 L.87
FOURTH READING (FROM ADDRESS 02C0H TO 02D1H)

Answer (23 bytes)

12 DF 05 DDA 05 FC 0B B1D 0E CRC CRC
Variable A L1 dmd A L2 dmd A L3 dmd kWh kvarh Hourmeter Value read (h) 05DF 05D9 05DA 0000 0BFC 0000 06B0E1D Value converted (d) Value 1,503 1,497 1,498 306,8 172,0 36,13 formatted A A A kWh kvarh hour
FIRST READING WITH BYTE ORDER INVERTION
Should the dat parameter be set to b, the previous example must be interpreted as follows: Request (8bytes)
DF 6F CDB 6F 9C 5 D9 6F 4B 0 BF 0 BF 0 BF CRC CRC
Variable V L1-N A L1 W L1 V L2-N. Value read(h) 0898 05DF 6FCValue converted (d) Value formatted 220,0V 1,503A 2861W 219,9V
Etc. 3.4 READING OF CONFIGURATION PARAMETERS

0 E CRC CRC

Answer (33 bytes)

1A F 0 F 0 6E 0 CRC CRC

Variable Password Tv Ta P_int Value read (h) 0003 000F 0005 000F Value converted (d) Value formatted 3 1,15min
FiS Fic Add AL_V up AL_V down AL_I System Reserved A_int dat 0001 006E 0005 0000
3% 110V 100V 1,00A 3P.n === 5min A (order MSB-LSB)

READING OF ALARM STATE

2 7E 50 59

Answer (7 bytes)

0 FC A0
To obtain the alarm representation, mask the not-significant bits of the byte indicated in bold (AND with the value 03h). In the example, the voltage alarm is ON.
READING OF C.G.C. INSTRUMENT CODE
Table of identification codes
Code 1Dh 1Eh 2Bh 2Ch Model WM14 AV5 Basic WM14 AV6 Basic CPT AV5 Basic CPT AV6 Basic 400VL-L 100VL-L 400VL-L 100VL-L / / / / Description 660VL-L 5A 208VL-L 5A 660VL-L 5A 208VL-L 5A
To read the identification code, send the following rigid-structure frame (the example is related to the address 2). The code is contained on the position 5 of the reply. Example: Request (8 bytes) 0 B 40 3B Answer (21 bytes)

1D 3C FF

1Dh is the identification code of the WM14 AV5

4 CRC CALCULATION

4.1 EXAMPLE OF CRC CALCULATION
Frame = 0207h Init CRC Load first character Execute the XOR with the first char. of the frame Execute first Shift to the right Carry = 1 , load polynomial Execute XOR with the polynomial Execute 2 Shift to the right Carry = 1 , load polynomial Execute XOR with the polynomial Execute 3 Shift to the right Execute 4 Shift to the right Carry = 1 , load polynomial Execute XOR with the polynomial Execute 5 Shift to the right Execute 6 Shift to the right Carry = 1 , load polynomial Execute XOR with the polynomial Execute 7 Shift to the right Execute 8 Shift to the right Carry = 1 , load polynomial Execute XOR with the polynomial Load second character of the frame Execute XOR with the second character of the frame Execute 1 Shift to the right Carry = 1 , load polynomial Execute XOR with the polynomial Execute 2 Shift to the right Carry = 1 , load polynomial Execute XOR with the polynomial Execute 3 Shift to the right Carry = 1 , load polynomial Execute XOR with the polynomial Execute 4 Shift to the right Execute 5 Shift to the right Carry = 1 , load polynomial Execute XOR with the polynomial Execute 6 Shift to the right Execute 7 Shift to the right Execute 8 Shift to the right CRC result 0001 1110

Hex FFFF = CRC

CRC xor BYTE = CRC n=0
CRC right shift carry over no yes CRC xor POLY = CRC n = n+1 no n>7 yes next BYTE no end message yes End POLY = crc calculation polynominal: A001h

12h 41h

Note: the byte 41h is sent first.