7.10 SINGLE BYTE COMMANDS
Single byte commands are commands in which all the necessary data for the supply to
tained in a single byte. Single byte commands will be executed immediately by the supply. If the
mand requires data to be sent to the HOST PC or IEEE Board (see sections 7.10.4 and 7.10.3.1)
that response will be transmitted immediately
with no delay due to any software overhead. With the
tion 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 verif
cation. All have the most significant
set to a logic 1. A CR, carriage return, character is not included in a single byte command.
The RST command will not change any setting made by a single byte command.
All Single Byte commands will be executed in 1 ms or less. This does not include any res
to the HOST/IEEE Board, which is dependent upon the response length and the serial transmission
Global commands without response
Disable MD Mode (MD MODE OPTION REQUIRED)
Disable is the default condition upon power up. The Hex
value of the command is 0xA0. Send it two
times in sequence. All supplies, both the currently addressed supply and all non
will disable MD Mode as a result of this command.
Enable MD Mode (MD MODE OPTION REQUIRED)
Drop Mode. The Hex value of the command is 0xA1. Sent it two times in s
quence. When this command is sent, the supply will set SRQ retransmission to the disable state; if
you wish it to be enabled you must send the enable command. All supplies, both the cu
dressed supply and all non
addressed supplies, will enable MD Mode as a r
Disable SRQ retransmission (MD MODE OPTION REQUIRED)
Disable is the default condition upon power up. The Hex value of the command is 0xA2. Sent
times in sequence. If the supply sends an SRQ it will only sent it 1 time. All supplies, both the cu
rently addressed supply and all non
addressed supplies, will disable SRQ retransmission as a result
of this command. All status registers will retain thei
r data when this command is sent.
Enable SRQ retransmission (MD MODE OPTION REQUIRED)
Enable retransmission of SRQs. This is only available when the Multi Drop Mode is enabled in the
supply. The Hex value of the command is 0xA3. Send it two times in sequen
ce. If the supply sends an
SRQ it will be repeated on a timely basis, 10 ms plus 20 ms times the supply address, until answered.
All supplies, both the currently addressed supply and all non
addressed supplies, will enable SRQ r
transmission as a result of
Enable FLT Bit in the SENA Register
The Hex value of the command is 0xA4. Send it two times in sequence.
Global commands with response
Disconnect from communications
Command the supply to end all data transmissions to the HOST PC/IEEE Board
the active addressed supply. The HOST PC/IEEE Board will be required to re
mand to reestablish communications with the supply. After receiving the first command the supply will
respond with an OK<CR>. The Hex val
ue of the command is 0xBF. All supplies, both the currently
addressed supply and all non
respond to this command; but only the cu
dressed supply (if any) will respond with the ‘OK’.
