Lambda Genesys 750W Technical Manual

Lambda Genesys 750W Technical Manual Manual pdf 65 page image

83-507-013 Rev. A587.10 SINGLE BYTE COMMANDS7.10.1 GeneralSingle byte commands are commands in which all the necessary data for the supply to act uponis 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 and7.10.3.1) that response will be transmitted immediately with no delay due to any software over-head. 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 verification. Alllhave the most significant bit, D7, set to a logic 1. A CR, carriage return, character is not includedin a single byte command. The RST command will not change any setting made by a single bytecommand.All Single Byte commands will be executed in 1 ms or less. This does not include any responsesent to the HOST/IEEE Board, which is dependent upon the response length and the serialtransmission speed (Baud rate).7.10.2 Global commands without response7.10.2.1 Disable MD Mode (MD MODE OPTION REQUIRED)Disable is the default condition upon power up. The Hex value of the command is 0xA0. Sendit 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.7.10.2.2 Enable MD Mode (MD MODE OPTION REQUIRED)Send to enable Multi Drop Mode. The Hex value of the command is 0xA1. Sent it two times insequence. When this command is sent, the supply will set SRQ retransmission to the disablestate; if you wish it to be enabled you must send the enable command. All supplies, both thecurrently addressed supply and all non-addressed supplies, will enable MD Mode as a resultof this command.7.10.2.3 Disable SRQ retransmission (MD MODE OPTION REQUIRED)Disable is the default condition upon power up. The Hex value of the command is 0xA2. Sentit 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 re-transmission as a result of this command. All status registers will retain their data when thiscommand is sent.7.10.2.4 Enable SRQ retransmission (MD MODE OPTION REQUIRED)Enable retransmission of SRQs. This is only available when the Multi Drop Mode is enabledin the supply. The Hex value of the command is 0xA3. Send it two times in sequence. If thesupply sends an SRQ it will be repeated on a timely basis, 10 ms plus 20 ms times the supplyaddress, until answered. All supplies, both the currently addressed supply and all non-addressed supplies, will enable SRQ retransmission as a result of this command.7.10.2.5 Enable FLT Bit in the SENA RegisterThe Hex value of the command is 0xA4. Send it two times in sequence.