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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 command the supply will respond with an OK<CR>. The Hex value of the com-
mand 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 return
the contents 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, $, will be added to signal the end of data and the start of
a checksum. The checksum will be the sum of all register data and will be represented in
two Hex bytes. The transmission will end with the CR character. If repetitive sending of
SRQs was active and the supply was sending them, the supply will stop sending repetitive
SRQs but leave the function active. The contents of the registers will not be destroyed.
Note that the supply does not have to be the active addressed supply.
Note that this command will not execute if another command is being processed.
7.10.4.2 Print Power On Time
Print the total time the supply has operated under AC power. Send 2 bytes in sequence, A6
Hex and the address of the supply in binary. A 32 bit integer will be returned in 8 Hex
bytes. The data will be the number of minutes that power has been ‘ON’ in the supply in bi-
nary. A ‘$’ 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 return
the last message sent. Note that the supply does not have to be the active addressed sup-
ply.
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 sup-
ply.
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 Sin-
gle Byte Command.
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