TDK 750W HALF RACK Addressed commands with response Read registers, Print Power On Time

7.10.3 Global commands with response

7.10.3.1Disconnect from communications

Command the supply to end all data transmissions to the HOST PC/IEEE Board and cease its role as the active addressed supply. The HOST PC/IEEE Board will be required to re-send the ‘ADR nn’ command to reestablish communications withthe supply. After receiving the first com- mand the supply will respond with an OK<CR>. The Hex value of the command is 0xBF. All sup- plies, both the currently addressed supply and all non-addressed supplies, will respond to this command; but only the currently addressed supply (if any) will respond with the ‘OK’.

7.10.4 Addressed commands with response

7.10.4.1Read registers

Send (0x80 + Address) (1 byte binary - send 2 times sequentially). The supply will return the con- tents of the Status Condition Register, the Status Enable Register, the Status Event Register (SEVE?), the Fault Condition Register, the Fault Enable Register and the Fault Event Register IFEVE/). All registers will be represented in two Hex bytes. Following the register data, a single dollar sign, $, will be added to signal the end of data and the start of a checksum. The checksum will be the sum of all register data and will be represented in two Hex bytes. The transmission will end with the CR character. If repetitive sending of SRQs was active and the supply was sending them, the supply will stop sending repetitive SRQs but leave the function active. The contents of the registers will not be destroyed. Note that the supply does snot have to be the active ad- dressed supply.

Note that this command will not execute if another command is being processed.

7.10.4.2Print Power On Time

Print the total time the supply has operated under AC power. Send 2 bytes in sequence, A6 Hex and the address of the supply in binary. A 32 bit integer will be returned in 8 Hex bytes. The data will be the number of minutes that power has been ‘ON’ in the supply in binary. A ‘$’ sign and 2 byte Hex checksum will be appended to the data. There is no method provided to reset this num- ber.

Retransmit last message.

Send (0xC0 + Address) (1 byte binary - send 2 times sequentially). The supply will return the last message sent. Note that the supply does not have to be the active addressed supply.

This command will not execute if another command is being processed.

Note that Single byte commands do not load data into the supply’s data output buffer. Thus this command will not cause the supply to retransmit data obtained from any previous Single Byte Command.

7.10.4.3Retransmit Last Message

Send (0xC0 + Address) (1 byte binary - send 2 times sequentially). The supply will return the last message sent. Note that the supply does not have to be the active addressed supply.

This command will not execute if another command is being processed.

Note that Single byte commands do not load data into the supply’s data output buffer. Thus this command will not cause the supply to retransmit data obtained from any previous Single Byte Command.

60

83-507-5002 Rev. B