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-- Supply network analyzer CVM-144 (HAR) ----- User's manual --- Page No. 48

11.4.- MODBUS © protocol

The CVM-144 analyzer can communicate by means of the

MODBUS ©

protocol, as it is following described:

When the CVM-144 communicates with MODBUS protocol, it uses the

RTU

mode

(Remote Terminal Unit ). Each 8-bits byte in a message contains two 4-bits

hexadecimal characters.

The format for each byte in RTU mode is :

Code

8-bits binary,

hexadecimal 0-9, A-F

Two hexadecimal characters

contained in each 8-bits field of the
message.
*

Bits per Byte

8 data bits

Error Check Field

Cyclical Redundancy Check (

CRC ) .

MODBUS FUNCTIONS:

FUNCTION 01

Reading of relay state

FUNCTION 3 or 4

Reading of n Words (16 bits-2 bytes). This function
permits to read all the electrical parameters

of the

CVM-144. Each parameters is a 32-bits long, hence
two words are required to inquiry for a parameter.

FUNCTION 05

Writing one relay

Содержание CVM-144 (HAR)

Страница 1: ...SUPPLY NETWORK ANALYZER CVM 144 HAR SERIES Harmonics INSTRUCTION MANUAL M98170501 03 04A CIRCUTOR S A...

Страница 2: ...and residual current 24 6 6 Setting power demand utility screens 26 6 7 Initial screen setting 27 6 8 Setting of the display shutdown time 27 6 9 Clearing energy counters 28 6 10 THD or D setting 29...

Страница 3: ...t the CVM 144 that the user should respect in order to guarantee a proper operation of all the instrument functions and keep its safety conditions Before powering the instrument for the first time ver...

Страница 4: ...power supplying the instrument read the CONNECTIONS and SET UP sections and choose the most suitable operation mode for getting your desired data reset The CVM 144 is an instrument which measures calc...

Страница 5: ...e THD THD V x x x Current THD THD A x x x Individual harmonic current content Up to the 31th x x x Analog inputs Input xx Earth leakage residual current x Available x Display and communications xx Com...

Страница 6: ...4 7 70 573 Mod CVM 144 RS485 C2 0573 RS485 2 7 70 574 Mod CVM 144 RS485 C2 Analogue 0574 RS485 2 3 1 7 70 575 Mod CVM 144 RS485 C2 Currents 0575 RS485 2 X 7 70 579 Mod CVM 144 RS485 C2 Digital 0579 R...

Страница 7: ...the instrument can be damaged When any protection failure is suspected to exist for example it presents external visible damages the instrument must be immediately powered off In this case contact a q...

Страница 8: ...unting Instrument is to be mounted on panel cut out 138 1 x 138 1 mm as per DIN 43 700 All connections keep inside the cabinet Note that with the instrument powered on the terminals could be dangerous...

Страница 9: ...tion No Terminal description 1 2 3 4 5 6 Power supply AL1 Power supply AL2 IL1 S2 Current measurement IL1 S1 Current measurement IL2 S2 Current measurement IL2 S1 Current measurement 7 8 9 10 11 12 IL...

Страница 10: ...144 RS232 C2 Code 770 576 No Terminal description No Terminal description No Terminal description 13 14 15 16 17 18 19 20 21 22 23 24 No used No used No used No used No used No used No used No used Re...

Страница 11: ...cription 13 14 15 16 17 18 19 20 21 22 23 24 4 20 mA I O common 4 20 mA D A1 output 4 20 mA A D3 input 4 20 mA A D2 input 4 20 mA A D1 input No used No used No used Relay RL2 output Relay RL2 common R...

Страница 12: ...easur residual current S2 3 A Measur neutral current S1 Measur neutral current S2 Not used Not used Not used Relay RL2 output Relay RL2 common Relay RL1 output Relay RL1 common 13 14 15 16 17 18 19 20...

Страница 13: ...urement of the residual current with the CVM 144 is shown in the below tables Measurement of residual current with a maximum value of 3 A 30 mA 3 A WG Transformer Mod CVM 144 Currents Terminal No Desc...

Страница 14: ...on 13 14 15 16 17 18 19 20 21 22 23 24 digital inputs common digital input IN4 digital input IN3 digital input IN2 digital input IN1 no used no used no used Relay RL2 output Relay RL2 common Relay RL1...

Страница 15: ...ge No 14 4 4 Connection drawing for the CVM 144 a Three phase network 4 wires low voltage S1 P1 S2 P2 L1 L2 L3 N S1 P1 S2 P2 S1 P1 S2 P2 N VL3 VL2 VL1 1 2 3 4 5 6 7 8 9 10 11 12 A C POWER SUPPLY Power...

Страница 16: ...HAR User s manual Page No 15 b Three phase network 3 wires low voltage S1 P1 S2 P2 L1 L2 L3 S1 P1 S2 P2 S1 P1 S2 P2 VL3 VL2 VL1 1 2 3 4 5 6 7 8 9 10 11 12 A C POWER SUPPLY PowerSupply SDC Model Termi...

Страница 17: ...nual Page No 16 c Three phase network 3 wires 2 P T and 3 C T S1 P1 S2 P2 L1 L2 L3 S1 P1 S2 P2 S1 P1 S2 P2 VL3 VL2 VL1 1 2 3 4 5 6 7 8 9 10 11 12 A C POWER SUPPLY b B a A b B a A b B a A PowerSupply S...

Страница 18: ...ER SUPPLY b B a A b B a A b B a A PowerSupply SDC Model Terminal Description V d c V d c 1 2 IMPORTANT REMARK If power 0 01 is shown for any of the phases codes 03 09 and 15 and voltage and current ar...

Страница 19: ...service After some seconds the analyzer is ready for operation and shows one of the available screens A led next to the shown parameter is on Parameters on display can be switch by pressing the key L...

Страница 20: ...keys performs as following described max to switch the displayed phase min to move along the 31th discrete harmonic orders Phase L 1 L 1 Phase Fundamental Fund or Hn 02 Harmonic order Value A 300 30...

Страница 21: ...rd to select different options and enter required variables The key validates de value and pass to the next menu The key MAX permits to select among different options in a menu or to increase a digit...

Страница 22: ...When you get in the display the desired option just press the key to validate it and access to the next set up option 6 2 Voltage display mode This option permits the user to select the voltage displ...

Страница 23: ...xt digit by pressing the min key in order to modify the other values c When the blinking digit is the last one pressing the min key we go back to the initial value set values can be again modified d P...

Страница 24: ...ctly connected to the mains without voltage transformer the values of primary and secondary must be the same for instance 00001 001 6 4 Current Transformer Primary SET A P and five digits appear on sc...

Страница 25: ...eutral current measurement 7 70 572 7 70 575 7 70578 6 5 1 Primary of the current transformer for neutral current measur IN The screen shows the message A_n P and fixe numeric digits that permit the u...

Страница 26: ...measuring transformer wiring 3 A or 30 A SEt A_L 3 A or 30 A a To select the appropriate input range just press the key max the value will switch from one option to the other one b To pass to the next...

Страница 27: ...III 36 Single line current A1 A2 A3 A PH Value of power integrated during the programmed demand period 2 DEMAND PERIOD 1 to 60 min Pd Per xx 3 CLEAR MAXIMUM VALUE IN MEMORY CLr Pd xx no or YES Program...

Страница 28: ...e led of the selected option will be on Whether rotary screens option is selected then all leds will be on Press to validate the choice 6 8 Setting of the display shutdown time Setting of the period o...

Страница 29: ...llowing set up option Display If any of the energies is programmed kWh kvarhL or kvarhC it is displayed as follows kWh max MWh min Wh Example If the accumulated energy is 32 534 810 kWh it will be dis...

Страница 30: ...n referred to the fundamental value b Thd total value of the harmonic distortion referred to the R M S value The selected option will be the one shown on screen To select any option just press max to...

Страница 31: ...user definable for each relay output On the CVM 144 screen following messages appear at this SET UP option OUT 1 RELAY 1 CODE 00 Parameter No 1 Depending on the selected variable we will pass to a or...

Страница 32: ...I 36 Power demand L2 Pd 42 Neutral current IN 37 Power demand L3 Pd 43 Analog input 1 Input 1 38 Analog input 2 Input 2 39 Analog input 3 Input 3 40 Residual earth leakage current 41 This parameters a...

Страница 33: ...up procedure max key to modify the value of the blinking value Every time it is pressed the value is increased min key to validate the blinking value and go to the next digit NOTE When the last digit...

Страница 34: ...t 1 two outputs can be configured as alarms For each output it is possible to set c Any of the parameters measured by the CVM 144 d MAXIMUM value e MINIMUM value f Delay for the conditions These scree...

Страница 35: ...ntrolled OUT 1 RELAY 1 AL LO 0 000 Minimum value b 3 Programming the delay OUT 1 RELAY 1 SEC Delay in seconds 0 000 maximum 9999 s Press to pass to the next option the set up for the second relay is t...

Страница 36: ...the set values of MAXIMUM and MINIMUM MIN MAX max min ON OFF ON 0 Min Max MIN MAX max min OFF ON OFF 0 Max Min MIN MAX ON OFF ON Min 0 Max MIN MAX OFF ON OFF Max 0 Min MIN MAX max min ON OFF ON Min Ma...

Страница 37: ...nits for the different parameters are Parameter Format Example Voltage V 220 5 220 5 V 0220 220 V Current A 0150 150 A Powers kW kvarL kvarC 0 540 540 W 250 5 250 5 kW Energies kWh kvarLh kvarCh 0 500...

Страница 38: ...bility of setting the scale offset and full scale values On the CVM screen following messages appear at this SET UP point provided the right module is connected to the equipment a Parameter choosing d...

Страница 39: ...lue Every time it is pressed the number is increased min key it allows validating the blinking value and go to the next digit NOTE When you arrive at the last digit you can move the position of the de...

Страница 40: ...ble dA 2 OUTPUT D A Nr 2 code xxxx Proceed as in the previous sections 1 Output calculation 20 Re Offset scale F Zero solution Offset f scale defined by the user Zero 0 mA or 4 mA Zero Offset Mesure s...

Страница 41: ...the analog inputs management the user must program the scale values offset and full scale value On the CVM screen following messages appear at this SET UP point provided the right module is connected...

Страница 42: ...the blinking value and go to the next digit NOTE When you arrive at the last digit you can move the position of the decimal point with the max key display to validate the selected option and pass to...

Страница 43: ...cy 45 to 65 Hz Rated current In 5 A isolated inputs in the CVM 144 ITF model Permanent overload 1 2 In Current input burden 0 75 VA Accuracy Voltage 0 5 of full scale 1 digits Current 0 5 of full scal...

Страница 44: ...odel Output type 0 4 20 mA Resolution 4096 points 12 bits Maximum impedance 500 Analog input features according to the model 0 20 mA inputs Resolution 4000 points 12 bits Input impedance 200 Character...

Страница 45: ...ng action should be done over the instrument open and powered and should those actions are essential high qualified operators must perform them Before any adjustment replacement maintenance or repairi...

Страница 46: ...oint 11 1 To take into account PROTOCOL MODBUS Question Answer CVM 144 DEFAULT CONFIGURATION 001 9 600 8 bits N 1 bit Available baud rates 1 200 2 400 4 800 9 600 19 200 bauds RS 485 type output RS 48...

Страница 47: ...ion to a RS 232 type input of a PC A1 A2 5 1 2 19 20 18 GND 5 1 2 7 5 2 3 5 7 3 2 RS 485 RS 232 CONVERTER DB 9 RS 232 RS 485 PC CVM 144 CVM 144 If the RS485 232 converter with RTS control ability code...

Страница 48: ...y network analyzer CVM 144 HAR User s manual Page No 47 11 3 RS 232 type connection to a RS 232 type input of a PC 19 Rx 20 Tx 18 GND 7 5 2 3 RS 232 DB 9 PC CVM 96 CVM 144 8 7 5 2 3 RS 232 DB 9 PC CVM...

Страница 49: ...characters The format for each byte in RTU mode is Code 8 bits binary hexadecimal 0 9 A F Two hexadecimal characters contained in each 8 bits field of the message Bits per Byte 8 data bits Error Chec...

Страница 50: ...10 0A 0B 6A 6B CA CB Current A 2 mA 0C 0D 6C 6D CC CD Active power kW2 W 0E 0F 6E 6F CE CF Reactive power kvar 2 var 10 11 70 71 D0 D1 Power factor PF2 PF x 100 12 13 72 73 D2 D3 Phase voltage V 3 V...

Страница 51: ...3D Inductive reactive energy kvarh L varLh 3E 3F Capacitive reactive energy kvarh C varCh 40 41 Three phase apparent power kVA III 42 43 A2 A3 102 103 Power demand L1 Pd 44 45 A4 A5 Three phase curren...

Страница 52: ...A 22B 248 249 Harmonic 14 20E 20F 22C 22D 24A 24B Harmonic 15 210 211 22E 22F 24C 24D Harmonic 16 24E 24F 26E 26F 28E 28F Harmonic 17 250 251 270 271 290 291 Harmonic 18 252 253 272 273 292 293 Harmon...

Страница 53: ...e read 7176 CRC character ANSWER 0A 04 14 00 00 08 4D 00 00 23 28 00 00 0F A0 00 00 00 90 00 00 00 60 CB 2E 0A CVM 144 number 10 in decimal 04 Reading function the one use for the inquiry 14 Bytes rec...

Страница 54: ...inary b7 b6 b5 b4 b3 b2 b1 b0 bit Relay outputs Digital inputs 770 579 y 770 580 bo relay 1 Digital input 1 b1 relay 2 Digital input 2 b2 No used Digital input 3 b3 No used Digital input 4 c Write of...

Страница 55: ...To access this menu proceed as follows Being the CVM 144 powered off simultaneously press max and min keys Holding these keys pressed powered the CVM 144 on When this option of the 2nd Setup menu is a...

Страница 56: ...locking or unlocking SET Up Unlo Loc locked SET UP or Unloc unlocked SET UP Use the key max to modify the choice Whether LOC is set when the SET UP is accessed configuration parameters can be visualiz...

Страница 57: ...nts 0572 x 7 70 569 Mod CVM 144 C2 Digital x 7 70 573 Mod CVM 144 RS485 C2 0573 x x 7 70 574 Mod CVM 144 RS485 C2 Analogue 0574 x x 7 70 575 Mod CVM 144 RS485 C2 Currents 0575 x 7 70 579 Mod CVM 144 R...

Страница 58: ...Smoothly insert the card checking that the frontal pins correctly fit into the connector until the card keeps firmly fixed 8 Cut the necessary removable pieces out from the rear cover to permit it to...

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