MAGSYS IGM11 Operating Instructions Manual page 52

9.6.2.3 Command Separator ";"
Several commands within the same command line string are separated by a semico-
lon. By means of a semicolon the indicated path is not changed. The two following
statements have the same meaning:
CMD:LOW 1;:CMD:HIGH 5
CMD:LOW 1;HIGH 5
9.6.2.4 Parameter Separator ","
If you require several parameters in one command, they have to be separated by a
comma.
9.6.2.5 Use of Blanks
A parameter must be separated from a command keyword by blanks (tab or space).
Blanks are usually only ignored in parameter lists.
9.6.2.6 Query Commands
The controller can send out commands at any time, however a SCPI device (here the
gaussmeter) will only answer, if it has expressly been instructed to do so. Only query
commands (commands that end with a question mark) prompt the device to send a
response. For queries, the device displays either measuring values or internal device
settings.
Note
9.6.2.7 Common Commands
Commands starting with an asterisk are called common commands. The commands
with asterisk are used for controlling status operations in the gaussmeter.
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Gaussmeter IGM11 Operating Instructions
If you send two query commands without having read the reply to
the first and thereupon try to read the first response, you might re-
ceive some data of the first reply, followed by the complete second
response. Therefore do not send any query command without having
read the reply beforehand. Commands and queries should not be
sent via the same program line. This might result in an overflow of
the raw data buffer, in the event that too many data are created.
Chapter 9 Serial Interfaces