TDK 750W HALF RACK technical manual Communication Interface Protocol

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7.5.2Multi power supply connection to RS232 or RS485 bus

Up to 31 units can be connected (daisy chained) to the RS232 or RS485 bus. The first unit con- nects to the controller via RS232 or RS485 and the other units are connected via the RS485 bus.

1.First unit connection: Refer to Section 7.5.1 for connecting the first unit to the controller.

2.Other units connection: The other units on the bus are connected via their RS485 interface. Refer to Figure 7-5 for typical connection.

-Set rear panel setup switch SW1-6 to its UP position.

-Using the Linking cable supplied with each unit (refer to Fig. 7-6), connect each unit OUT connector to the next unit IN connector.

RS232/RS485

RS485

RS485

RS485

IN	OUT	IN	OUT	IN	OUT	IN	OUT
POWER SUPPLY		POWER SUPPLY		POWER SUPPLY		POWER SUPPLY
	#1		#2		#3		#31

Fig7-5: Multiple power supply RS232/485 connection

1

8

L=0.5m typ.


	PIN NO.		NAME	PIN NO.		NAME
	HOUSING		SHIELD	HOUSING		SHIELD
1			SG	1		SG
6			TXD -	6		RXD -
3			TXD +	3		RXD +
	5		RXD -	5		TXD -
	4		RXD +	4		TXD +

8

1

Fig.7-6:Serial link cable with RJ-45 shielded connectors (P/N: GEN/RJ-45)

7.6 COMMUNICATION INTERFACE PROTOCOL

NOTE

The address (ADR n) command must return an “OK” response before any other commands are accepted.

7.6.1Data format

Serial data format is 8 bit, one start bit and one stop bit. No parity bit.

7.6.2Addressing

The Address is sent separately from the command. It is recommended to add 100msec delay between query or sent command to next unit addressing. Refer to Section 7.8.3 for details.

7.6.3End of Message

The end of message is the Carriage Return character (ASCII 13). The power supply ignores the Line Feed (ASCII 10) character.

7.6.4Command Repeat

The backslash character “\” will cause the last command to be repeated.

7.6.5Checksum

The user may add a checksum (optional) to the end of the command. The checksum is “$” fol- lowed by two hex characters. If a command or a query has a checksum, the response will also have one. There is no CR between the command string and the “$” sign.

Example: STT?3A STAT?$7B

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83-507-5002 Rev. B

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Contents Genesystm 750W Half Rack Page Page Genesys Manual Supplement Table of Contents Front and Rear Panel Controls and CONNECTORS………... ……… ……… Isolated Analog Progamming Option ……………………………..…… Warranty Safety Instructions Safety Instructions SICHERHEITS-INSTALLATIONS Anweisungen Umweltbedingungen Sicherheits-und WarnsymboleAnderungen and Bauteileersatz Introduction Features and optionsGeneral Information General DescriptionAnalog voltage programming and monitoring Multiple output power systemControl via the serial communication port Parallel operationAccessories Specifications ChapterFront Panel Supplemental Characteristics Genesystm Genh 750W Power Supplies Outline Drawings Preparation for USE InstallationGeneral Initial InspectionsSingle unit installation Rack MountingAC Source Requirements AC Input Power ConnectionLOCATION, Mounting and Cooling GENH/RM Rack Mounting outline drawingsAC Input Cord TURN-ON Checkout ProcedureAC Input Connector GeneralOVP Check Constant Voltage CheckConstant Current Check UVL CheckConnecting the Load Wire termination AWGMaking the load connections Noise and Impedance EffectsInductive loads 6V to 60V ModelsBus-bars shield mounting 80V to 600V Models 83-507-5002 Rev. B Connecting multiple loads, radial distribution method Connecting single loads, local sensing defaultConnecting single loads, remote sensing Multiple load connection with distribution terminals Grounding outputsLocal and Remote Sensing Sense wiringOutput Terminal Grounding Local sensing10.4 J2 sense connector technical information Remote sensingVoltage Front and Rear Panel Controls and ConnectorsFront Panel Controls and Indicators Auxiliary Function Rear Panel Connections and Controls Rear panel connections and controls Number DescriptionRear Panel SW1 Setup Switch 1 SW1 position functionMaking J1 connections Rear Panel J1 Programming and Monitoring ConnectorResetting the SW1 switch 83-507-5002 Rev. B Ifcom SignalEnain LocalLocal Operation Constant Voltage ModeConstant Current Mode Standard OperationOver Voltage Protection OVP Setting the OVP levelResetting the OVP circuit Automatic CrossoverFoldback Protection Output SHUT-OFF SO Control VIA Rear Panel J1 ConnectorUnder Voltage Limit UVL Output ON/OFF ControlENABLE/DISABLE Control VIA Rear Panel J1 Connector CV/CC SignalLast Setting Memory Psok SignalOver Temperature Protecton OTP SAFE-START and AUTO-RESTART ModesSeries Operation Series connection for increased output voltageSeries connection for positive and negative output voltage Series connection for positive/negative output voltagesParallel Operation Setting up the Master unitSetting up the Slave units Basic parallel operationAdvanced parallel configuration Setting Over Voltage protectionSetting Foldback protection Setting the units as Master or SlaveCurrent display accuracy Master and Slave units default operationTo release units from Slave mode AST OFF OUT OFFDAISY-CHAIN Connection Front Panel LockingUnlocked front panel Locked front panelRemote Analog Programming LOCAL/REMOTE Analog IndicationDown Remote voltage programming connectionResisitive Programming of Output Voltage and Current Limit Remote resistive programmingRemote Monitoring of Output Voltage and Current RS232 & RS485 Remote Control Configuration Front panel in Remote mode Rear Panel RS232/RS485 Connector 6 RS232/RS485 port in Local mode MD Mode SRQ MD Mode DescriptionMD Mode enable Serial communication mode MD Mode SRQ RetransmissionConnecting Power Supplies to RS232 or RS485 BUS Single power supplyCommunication Interface Protocol Error Messages Command SET DescriptionOutput Control Commands Initialization Control CommandsID Control Commands FILTER? DVC?Filter OUT?Global Output Commands Disable SRQ retransmission MD Mode Option Required Single Byte CommandsEnable MD Mode MD Mode Option Required Enable SRQ retransmission MD Mode Option RequiredRetransmit Last Message Addressed commands with response Read registersPrint Power On Time Re-enable SRQ with out reading/clearing the Seve Register Test if MD Mode is InstalledAddressed commands without response Acknowledge SRQ 110x STATUS, Error and SRQ Registers Status Control CommandsConditional Registers TXDService Request Enable and Event Registers BITFault Enable Register Fault Event RegisterStatus Enable Register Status Event RegisterCommunication Test Power supply set-upSerial Communication Test SET-UP 1 0-5V/0-10V Option PN IS510 SpecificationsIsolated Analog Programming Option PPM/CIsolated Programming & Monitoring Connector Setup and Operating Instructions Maintenance OUP Fuse Rating