TDK 750W HALF RACK technical manual Single Byte Commands, Enable MD Mode MD Mode Option Required

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7.10 SINGLE BYTE COMMANDS

7.10.1 General

Single byte commands are commands in which all the necessary data for the supply to act upon is contained in a single byte. Single byte commands will be executed immediately by the supply. If the command requires data to be sent to the HOST PC or IEEE Board (see sections 7.10.4 and 7.10.3.1) that response will be transmitted immediately with no delay due to any software overhead. With the exception of the Disconnect from communications command, section 7.10.3.1, commands must be sent by the HOST PC or IEEE Board 2 times in sequence for verifi- cation. Alll have the most significant bit, D7, set to a logic 1. A CR, carriage return, character is not included in a single byte command. The RST command will not change any setting made by a single byte command.

All Single Byte commands will be executed in 1 ms or less. This does not include any response sent to the HOST/IEEE Board, which is dependent upon the response length and the serial transmission speed (Baud rate).

7.10.2 Global commands without response

7.10.2.1Disable MD Mode (MD MODE OPTION REQUIRED)

Disable is the default condition upon power up. The Hex value of the command is 0xA0. Send it two times in sequence. All supplies, both the currently addressed supply and all non-addressed supplies, will disable MD Mode as a result of this command.

7.10.2.2Enable MD Mode (MD MODE OPTION REQUIRED)

Send to enable Multi Drop Mode. The Hex value of the command is 0xA1. Sent it two times in sequence. When this command is sent, the supply will set SRQ retransmission to the disable state; if you wish it to be enabled you must send the enable command. All supplies, both the cur- rently addressed supply and all non-addressed supplies, will enable MD Mode as a result of this command.

7.10.2.3Disable SRQ retransmission (MD MODE OPTION REQUIRED)

Disable is the default condition upon power up. The Hex value of the command is 0xA2. Sent it two times in sequence. If the supply sends an SRQ it will only sent it 1 time. All supplies, both the currently addressed supply and all non-addressed supplies, will disable SRQ retransmission as a result of this command. All status registers will retain their data when this command is sent.

7.10.2.4Enable SRQ retransmission (MD MODE OPTION REQUIRED)

Enable retransmission of SRQs. This is only available when the Multi Drop Mode is enabled in the supply. The Hex value of the command is 0xA3. Send it two times in sequence. If the supply sends an SRQ it will be repeated on a timely basis, 10 ms plus 20 ms times the supply address, until answered. All supplies, both the currently addressed supply and all non-addressed supplies, will enable SRQ retransmission as a result of this command.

7.10.2.5Enable FLT Bit in the SENA Register

The Hex value of the command is 0xA4. Send it two times in sequence.

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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 Anderungen and Bauteileersatz Sicherheits-und WarnsymboleUmweltbedingungen General Description Features and optionsGeneral Information IntroductionParallel operation Multiple output power systemControl via the serial communication port Analog voltage programming and monitoringAccessories Chapter SpecificationsFront Panel Supplemental Characteristics Genesystm Genh 750W Power Supplies Outline Drawings Initial Inspections InstallationGeneral Preparation for USERack Mounting Single unit installationGENH/RM Rack Mounting outline drawings AC Input Power ConnectionLOCATION, Mounting and Cooling AC Source RequirementsGeneral TURN-ON Checkout ProcedureAC Input Connector AC Input CordUVL Check Constant Voltage CheckConstant Current Check OVP CheckConnecting the Load AWG Wire termination6V to 60V Models Noise and Impedance EffectsInductive loads Making the load connectionsBus-bars shield mounting 80V to 600V Models 83-507-5002 Rev. B Connecting single loads, remote sensing Connecting single loads, local sensing defaultConnecting multiple loads, radial distribution method Grounding outputs Multiple load connection with distribution terminalsLocal sensing Sense wiringOutput Terminal Grounding Local and Remote SensingRemote sensing 10.4 J2 sense connector technical informationFront Panel Controls and Indicators Front and Rear Panel Controls and ConnectorsVoltage Auxiliary Function Rear panel connections and controls Number Description Rear Panel Connections and Controls1 SW1 position function Rear Panel SW1 Setup SwitchResetting the SW1 switch Rear Panel J1 Programming and Monitoring ConnectorMaking J1 connections 83-507-5002 Rev. B Local SignalEnain IfcomStandard Operation Constant Voltage ModeConstant Current Mode Local OperationAutomatic Crossover Setting the OVP levelResetting the OVP circuit Over Voltage Protection OVPOutput ON/OFF Control Output SHUT-OFF SO Control VIA Rear Panel J1 ConnectorUnder Voltage Limit UVL Foldback ProtectionCV/CC Signal ENABLE/DISABLE Control VIA Rear Panel J1 ConnectorSAFE-START and AUTO-RESTART Modes Psok SignalOver Temperature Protecton OTP Last Setting MemorySeries connection for increased output voltage Series OperationSeries connection for positive/negative output voltages Series connection for positive and negative output voltageBasic parallel operation Setting up the Master unitSetting up the Slave units Parallel OperationSetting the units as Master or Slave Setting Over Voltage protectionSetting Foldback protection Advanced parallel configurationAST OFF OUT OFF Master and Slave units default operationTo release units from Slave mode Current display accuracyFront Panel Locking DAISY-CHAIN ConnectionLocked front panel Unlocked front panelLOCAL/REMOTE Analog Indication Remote Analog ProgrammingRemote voltage programming connection DownRemote resistive programming Resisitive Programming of Output Voltage and Current LimitRemote Monitoring of Output Voltage and Current Configuration RS232 & RS485 Remote Control6 RS232/RS485 port in Local mode Rear Panel RS232/RS485 ConnectorFront panel in Remote mode MD Mode SRQ Retransmission MD Mode DescriptionMD Mode enable Serial communication mode MD Mode SRQSingle power supply Connecting Power Supplies to RS232 or RS485 BUSCommunication Interface Protocol Command SET Description Error MessagesID Control Commands Initialization Control CommandsOutput Control Commands OUT? DVC?Filter FILTER?Global Output Commands Enable SRQ retransmission MD Mode Option Required Single Byte CommandsEnable MD Mode MD Mode Option Required Disable SRQ retransmission MD Mode Option RequiredPrint Power On Time Addressed commands with response Read registersRetransmit Last Message Addressed commands without response Acknowledge SRQ Test if MD Mode is InstalledRe-enable SRQ with out reading/clearing the Seve Register 110x Status Control Commands STATUS, Error and SRQ RegistersTXD Conditional RegistersBIT Service Request Enable and Event RegistersFault Event Register Fault Enable RegisterStatus Event Register Status Enable RegisterSerial Communication Test SET-UP Power supply set-upCommunication Test PPM/C SpecificationsIsolated Analog Programming Option 1 0-5V/0-10V Option PN IS510Isolated Programming & Monitoring Connector Setup and Operating Instructions Maintenance OUP Fuse Rating
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