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83-507-5002 Rev. B
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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 required to re-send the
‘ADR nn’ command to reestablish communications with the 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
7.10.4.1 Read 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, $, will be added to signal the end of data and the start of a checksum. The checksum
will be the sum of all register data and will be represented in two Hex bytes. The transmission will
end with the CR character. If repetitive sending of SRQs was active and the supply was sending
them, the supply will stop sending repetitive SRQs but leave the function active. The contents of
the registers will not be destroyed. Note that the supply does snot have to be the active ad-
dressed supply.
Note that this command will not execute if another command is being processed.
7.10.4.2 Print Power On Time
Print the total time the supply has operated under AC power. Send 2 bytes in sequence, A6 Hex
and the address of the supply in binary. A 32 bit integer will be returned in 8 Hex bytes. The data
will be the number of minutes that power has been ‘ON’ in the supply in binary. A ‘$’ 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.
7.10.4.3 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.