11-26 Remote Operation
Using common commands and SCPI commands in the same message
Both common commands and SCPI commands can be used in the same message as long as
they are separated by semicolons (;). A common command can be executed at any command
level and will not affect the path pointer.
:stat:oper:enab <NRf>; *ESE <NRf>
Program message terminator (PMT)
Each program message must be terminated with an LF (line feed), EOI (end or identify), or
an LF+EOI. The bus will hang if your computer does not provide this termination. The following
example shows how a program message must be terminated:
:rout:scan (@1:5) <PMT>
Command execution rules
• Commands execute in the order that they are presented in the program message.
• An invalid command generates an error and, of course, is not executed.
•Valid commands that precede an invalid command in a multiple command program
message are executed.
•Valid commands that follow an invalid command in a multiple command program
message are ignored.
Response messages
A response message is the message sent by the instrument to the computer in response to a
query command program message.
Sending a response message
After sending a query command, the response message is placed in the Output Queue. When
the Model 2182 is addressed to talk, the response message is sent from the Output Queue to the
computer.
Multiple response messages
If you send more than one query command in the same program message (see “Multiple
command messages”), the multiple response messages for all the queries is sent to the computer
when the Model 2182 is addressed to talk. The responses are sent in the order that the query
commands were sent and are separated by semicolons (;). Items within the same query are
separated by commas (,). The following example shows the response message for a program
message that contains four single item query commands:
0; 1; 1; 0
Response message terminator (RMT)
Each response is terminated with an LF (line feed) and EOI (end or identify). The following
example shows how a multiple response message is terminated:
0; 1; 1; 0; <RMT>
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