MD Mode Option Factory Installed MD Mode Description | TDK 750W

7.4 MD MODE OPTION (Factory Installed)

7.4.1MD Mode Description

The GEN supply is capable of operating in a multi drop environment - more than 1 supply conducting serial communications on a single serial bus. A maximum of 31 GEN supplies can operate in this sin- gle bus. Upon power up the Gen will enter the point-to-point mode in which it is assumed that only 1 supply will operate on a serial bus. MD Mode must be enabled - Ref. Section 7.10.2.2. The user must set all Slave supplies to a unique address. No two supplies may have the same address.

7.4.2MD Mode enable – Serial communication mode

Refer to section 7.10.2.2. MD Mode is entered into via a Single byte command. In MD Mode the Mas- ter supply shall operate in one of the two serial modes, RS232 or RS485, depending upon the rear panel DIP switch setting and the Slave supplies shall operate in the RS485 serial mode.

7.4.3MD Mode SRQ

In MD Mode the SRQ generated by the supply is replaced by a single byte SRQ sent two times in se- quence. The SRQ byte, in binary, will contain the address of the supply in the least significant 5 bits with bits 5 and 6 set to logic zero and bit 7 set to logic 1. Ref. Table 7-4.

7.4.4Communication Collisions

In MD Mode it is possible to have one supply issue an SRQ while another supply is transmitting data/response to a command. When this happens, the HOST PC will receive garbled data and as- sume that the data/response was corrupted and thus re-send the command - the SRQ will probably be lost. The method of recovery will be SRQ retransmission, Ref. Section 7.4.5, or polling all attached supplies to see who issued the SRQ - available by reading the SEVE? Register.

7.4.5MD Mode SRQ Retransmission

The supply can be commanded to retransmit the SRQ at regular intervals until it is answered to by the HOST PC (Ref. Section 7.10.2.4). The retransmission interval is 10 ms plus the supply address multi- plied by 20 ms.

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TDK 750W MD Mode Option Factory Installed MD Mode Description, MD Mode enable Serial communication mode, MD Mode SRQ

Contents

Genesystm 750W/1500W Page Page Genesys Manual Supplement Table of Contents Front and Rear Panel Controls and Connectors ………...……… Remote Analog PROGRAMMING……………………………………………… Isolated Analog Programming OPTION………………………………… Trademark Information Limitation of WarrantyWarranty Service Disclaimer Safety Instructions Environmental Conditions SICHERHEITS-INSTALLATIONS Anweisungen Umweltbedingungen Sicherheits-und WarnsymboleAnderungen and Bauteileersatz General Description Features and optionsGeneral Information Introduction Parallel operation Multiple output power systemControl via the serial communication port Analog voltage programming and monitoring Accessories Chapter Specifications Vout Supplemental Characteristics Genesystm 750W & 1500W Power Supplies Outline Drawings Initial Inspections InstallationGeneral Preparation for USE Rack Mount Slides optional AC Input Power ConnectionLOCATON, Mounting and Cooling AC Source Requirements AC Input Cord AC Input Connector, 1500W modelsAC Input Connector, 750W models AC Input Wire Connection, 1500W models Prior to Operation TURN-ON Checkout ProcedureGeneral UVL Check Constant Voltage CheckConstant Current Check OVP Check Connecting the Load AWG Wire termination Making the load connections 6V to 60V Models Noise and Impedance EffectsInductive loads 80V to 600V Models Wire terminal lug 2 places Load wires connection to the output connector Connecting multiple loads, radial distribution method Connecting single loads, local sensing defaultConnecting single loads, remote sensing Grounding outputs Multiple load connection with distribution terminals Local sensing Sense wiringOutput Terminal Grounding Local and Remote Sensing Remote sensing 10.4 J2 sense connector technical information Front Panel Controls and Indicators Front and Rear Panel Controls and Connectors Auxiliary Function Rear panel connections and controls Rear Panel Connections and Controls Rear Panel SW1 Setup Switch 1 SW1 position function Resetting the SW1 switch Making J1 connections Rear Panel J1 Programming and Monitorng Connector Local SignalEnain Ifcom Local Operation Constant Voltage ModeConstant Current Mode Automatic Crossover Setting the OVP levelResetting the OVP circuit Over Voltage Protection OVP Output ON/OFF Control Output SHUT-OFF SO Control VIA Rear Panel J1 ConnectorUnder Voltage Limit UVL Foldback Protection Psok Signal ENABLE/DISABLE Control VIA Rear Panel J1 ConnectorCV/CC Signal Safe-start mode Over Temperature Protecton OTPLast Setting Memory Auto-restart mode Series connection for increased output voltage Series Operation Series connection for positive/negative output voltages Series connection for positive and negative output voltage Parallel Operation Connection to the load Advanced parallel configurationSetting the units as Master or Slave Master and Slave units default operation AST OFF *OUT OFF To release units from Slave modeCurrent display accuracy Locked front panel DAISY-CHAIN ConnectionFront Panel Locking Unlocked front panel LOCAL/REMOTE Analog Indication Remote Analog Programming Remote voltage programming connection Down Remote resistive programming Resisitive Programming of Output Voltage and Current Limit Remote Monitoring of Output Voltage and Current Configuration RS232 & RS485 Remote Control Front panel in Remote mode Rear Panel RS232/RS485 Connector6 RS232/RS485 port in Local mode MD Mode SRQ Retransmission MD Mode Option Factory Installed MD Mode DescriptionMD Mode enable Serial communication mode MD Mode SRQ Single power supply Connecting Power Supplies to RS232 or RS485 BUS Communication Interface Protocol Command SET Description Error Messages Output Control Commands Initialization Control CommandsID 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 Required Addressed commands without response Acknowledge SRQ Addressed commands with response Read registersPrint Power On Time Test if MD Mode is Installed 1010 None Disable retransmission of SRQs by GEN750W models GEN1500W models Current programming range 10.6 Status Control Commands STATUS, Error and SRQ Registers Status Registers Conditional Registers BIT Service Request Enable and Event Registers Fault Event Register Fault Enable Register Status Event Register Status Enable Register Communication Test Power supply set-upSerial Communication Test SET-UP PPM/C SpecificationsIsolated Analog Programming Option 1 0-5V/0-10V Option PN IS510 Isolated Programming & Monitoring Connector Setup and Operating Instructions Maintenance OUP Fuse Rating