Multitek Comm-Box Specifications

PowerComCOMMUNICATIONTRANSDUCERM550-CT*OPERATING MANUALM550MAN.PM5 01/08/101, 12:481

2.6 Changing Baud Rate.ACTION : Click Baud RateBox.COMMENTS :Chose Baud Rate. Either2400, 4800, 9600, 19200.2.7 Changing Parity.ACTION : Click Parity

Note if wording in Modbus box is "NO REPLY FROMNODE". Check polarity connection of RS485 link at M550and PC. Check that M550 has auxiliary p

10ACTION : Click onbutton.COMMENTS : This buttonmoves forward oneparameter, and displays thisparameter in the sixth boxe.g. PF Avg is now shown.ACTI

112.10 Stopping and pausing communication.2.10.1 To pause communication.ACTION : Click on Pausebutton.COMMENTS : Thecommunication pauses.ACTION : Cli

122.11 Starting timer.The timer is real time clock provided by the Monitorprogram. It is useful for checking Watt hour readings etc.ACTION : Click St

132.12.1 Entering General Pass CodeACTION : Click GeneralPass Code ButtonCOMMENTS :Enter value box isdisplayed.2.12 Security code. (General Pass Code)

142.13.2 To Unlock M550 communications settings.ACTION : Click UnlockButton.COMMENTS :M550 communication port isnow unlocked.ACTION : Click LockButton

2.14 Programming of nominal voltage and current inputsand ratios.The program allows the user to program the nominalvoltage and current inputs and rati

ACTION : Enter valueCOMMENTS : Enter11000 (11kV). Click onO.K.2.14.2Changing CT ratio.For example to change for 200/5A change to 400/5 :-ACTION : Clic

172.15 Pulsed Output (Pulsed output is an option. If the unitdoes not have this option please proceed to section 2.16)The M550 measures and displays

CONTENTSUpdate: M550 Version 41. INTRODUCTION2. PROGRAMMING PARAMETERS3. PROGRAMMING MODBUS REGISTERSEQUENCE.4. RS485 COMMUNICATION5. INSTALLATION6.

182.15.2 Selecting Relay output pulse width.The pulse width can be set between 0msec (off) and200msec, in steps of 20msec.ACTION : Click On PulseWidth

19ACTION : NoneCOMMENTS : Divisor setfor 1. This means after every1 unit that M550 counts therelay pulses once.ACTION : Select Divisorrequired.COMMENT

202.16.1 Programming demand periods.Example to change from 8 min to 30 min demand period :ACTION : Click OnDemand Button.COMMENTS : "EnterValue&q

212.17 Resetting of demand period.The Demand reset programming mode allows the User toreset the demand period to zero. i.e Wd (Average WattDemand Imp

22ACTION : Click OnRegisters BoxCOMMENTS : The order ofthe displayed measurementsnow matches that of theModbus registers in thenode. See section 32.20

23ACTION : Enter NodeAddress Required.COMMENTS : Example ifnode address 30 is requiredenter 30 and click OK Button2.21 Calibration Factors.This option

242.21.2 Reading Calibration DataACTION : Manually recordcalibration figures for V1,V2, V3, I1, I2, I3.COMMENTS : Thesevalues must be stored withthe

2.25 Additional Information that M550 Monitor95provides :25Model = Model No 550Version = Software versionnumberType = System Type.either 3ph 4W (3 pha

26Stack Free = Nodes internalprogram, stack state.Parity Errors = number oferrors since node coldstarted.CRC errors = Number ofCRC errors since node c

3.0 PROGRAMMING MODBUS REGISTERS SEQUENCEIf changing of the modbus order is not required please moveto section 4.0 communication.3.1 Using the M550 S

M550 Version 4 update:RS485 response time decreased to better than 10ms.Choice of four Endian settings for floating point transmission.Modbus 3X Regis

Baud Rate = 9600, Parity = None283.4 Opening communication port.ACTION : Click on CommsButton.COMMENTS :Choose which communica-tion port, 1 or 2. Clic

For Example if the order required is Total Watt (W sum),System Frequency (Hz), Average Power Factor of System(PF Avg) and Maximum VA Demand (Max VAd)

ACTION : Click >> Button.COMMENTS :Hz (This appears in NodeNo Box)ACTION : Click SendButton.COMMENTS :All information in the NodeNo box is sen

Note. The parameters not selected are placed in the defaultorder after the parameters chosen.3.6 Additional Options the Modbus Register Tool ProgramOf

324.1 M550 Modbus Protocol4.0 RS485 COMMUNICATIONThe RS 485 allows remote reading and programming of theM550 via a host computer. The communicationpro

4.1.2 Communication FormatBaud rate : 2400, 4800, 9600, 19200Low level character format :With Odd or Even parity = 1 start bit, 8 data bits, 1 parity

CRC CalculationsTo calculate the Cyclic Redundancy Check value.Load a word register with 0xFFFF (CRCREG)Repeat the following for each character in the

354.3.6 Timing4.3.7 Response time.Modbus response time from reception of the last characterto the transmission of the 1st character in its reply is le

36An EXCEPTION error will be generated if the node cannotfulfil the task set by the Master or the Slave receives invaliddata in its data slot.Exceptio

A sample write packet will look like this:-[Node][04][start address][No. of Double RegistersRequested][CRC(2 bytes)]e.g. To read line to neutral volta

M550 V4 Modbus 4X registersModbus Register Name Mode40001 (0x0000) SYSTEM VOLTAGE (R/W)40003 (0x0002) SYSTEM CURRENT (R/W)40005

Continued :-Modbus Add. Register Add. Register Name Order No.30033 (0x20) W 1 1730035 (0x22) W 2 1830037 (0x24) W 3 1930039 (0x26) VAr 1 203004

Modbus Register Order: Overview (also see section 4 andhelp file of M550 software)M550 has the facility to reorder its Modbus 3X registers tosuit an e

ExampleTo obtain all 3 line powers in a 4 wire system on Node 23hPacket from master :A sample write packet will look like this:-[Node][1E][start addr

ReadPacket from master format :[Node addr][03][Register start addr.(2 bytes)][No of reg(2bytes)][CRC (2 bytes)]Response form Slave format :[Node addr

[Node][10][start address][No. of Double Registers][Datalength in bytes][CRC(2 bytes)]e.g. To set Node 23h System Voltage and System Currenttogether:-[

40049 (0x30) I/P V2 GAIN FACTOR (R/W)40051 (0x32) I/P V3 GAIN FACTOR (R/W)40053 (0x34) I/P I1 GAIN FACTOR (R/W)40055 (0x36) I

Response from slave format ;[23][03][08][8 bytes of data(2 regs x 4 bytes)] [CRC (2 bytes)]To set both System Volts and System Amps on Node 23hPacket

453) The number of parity errors detected by the node.(countsup to 255 then flips over to zero)4) The number of framing errors detected by thenode.(co

5. INSTALLATION5.1 CaseThe M550 is designed for snap on to Din rail mount 35 x7.5mm. Complies with DIN-EN 50022CASE DIMENSIONS46M550MAN.PM5 01/08/101

5.2 Auxiliary SupplyThe auxiliary supply can be connected in parallel with themeasuring input voltage, but this restricts the measuringrange of the in

31.1 GeneralPowerCom M550 communication transducer is a completemeasuring system in a single 100mm Din rail mount case.Measuring Phase Volts, Phase C

5.5 Voltage TransformersConnection of voltages higher than the rated voltage, thatis specified on the M550 data label, is possible usingexternal volta

6. CONNECTION DIAGRAMS6.1 All connections must be made ensuring, all starts andfinishes of current and voltage transformers are connectedas shown.SING

3 PHASE 3 WIRE UNBALANCED LOAD503 PHASE 4 WIRE UNBALANCED LOADM550MAN.PM5 01/08/101, 12:4850

7. M550 SPECIFICATIONSINPUTRated Un Direct connected voltages between 57.8and 600 v. Standard voltages offered :-63.5/110 V, 69.3 / 120 V, 120 / 208 V

AC voltage 115 or 230 volts (±15%)DC voltage 12 / 24 / 48 / 110 / 125 voltsAUXILIARYRELAY OUTPUT : (optional)Pulsed output W.h or VAr.h or VA.h or A.

APPLIED STANDARDSGeneral IEC 688 BSEN60688, BS4889, IEC 359EMC Emissions EN61326-1Immunity EN61326-2Safety EN61010-1INSULATIONTest Voltage 4kV RMS

Export Reactive Energy (VAr.h), Power Factor per phase(P.F.), System Power Factor (P.F.), Amp Demand, WattDemand, V A Demand, Maximum Amp Demand,Maxim

1.4 CommunicationsThe M550 provides RS485 output of all measuredparameters.The serial port option enables remote reading andprogramming of the M550 vi

2.0 PROGRAMMING2.1 Using the M550 Software Monitor 95.(M550 Software Monitor 95 can be obtained from yourMultitek distributor, or the Multitek website

ACTION : Click ResponseTime Box.COMMENTS :Enter Value of responsetime. Minimum value300mSec.2.4 Changing Node NumberACTION : Click Node No.Box.COMMENT