Lambda Genesys GENH 750W - Global Commands with Response; Addressed Commands with Response

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83-507-5002 Rev. A

7.10.3 Global commands with response

7.10.3.1 Disconnect 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 re-

quired to re-send the ‘ADR nn’ command to reestablish communications with the sup-

ply. After receiving the first command the supply will respond with an OK<CR>. The

Hex value of the command is 0xBF. All supplies, 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

7.10.4.1 Read registers

Send (0x80 + Address) (1 byte binary - send 2 times sequentially). The supply will re-

turn the contents of the Status Condition Register, the Status Enable Register, the

Status Event Register (SEVE?), the Fault Condition Register, the Fault Enable Regis-

ter 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 con-

tents of the registers will not be destroyed. Note that the supply does snot have to be

the active addressed supply.

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

7.10.4.2 Print Power On Time

Print the total time the supply has operated under AC power. Send 2 bytes in se-

quence, A6 Hex and the address of the supply in binary. A 32 bit integer will be re-

turned 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 number.

Retransmit last message.

Send (0xC0 + Address) (1 byte binary - send 2 times sequentially). The supply will re-

turn the last message sent. Note that the supply does not have to be the active ad-

dressed 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.

7.10.4.3 Retransmit Last Message