3.2 Before Programming
ITC500 / page 62
3.2 Before Programming
3.2.1 Nomenclature
Program messages (PC ⇒ ITC5xx) are written in inverted commas: "*IDN?"
Response messages (ITC5xx ⇒ PC) are written in brackets: [MODE CC]
There is a decimal point: 1.234
Parameters are separated with comma: "PLOT 2,0"
3.2.2 Program and response messages
Blocks of message data are transferred between the controller and the ITC5xx during
communication. Messages sent from the controller to the ITC5xx are called program
messages, and messages sent back from the ITC5xx to the controller are called
response messages. If a program message contains a query command, i.e. a
command which requests a response, the ITC5xx returns a response message.
Program messages
With program messages, settings are effected (command) at the ITC5xx and
response messages are selected (query). Program messages can be separated with
semicolon. All program messages are executed sequentially (one by one).
Examples:
":MODE CC" select the mode “constant current“
(command)
"*IDN?" request the identification (query)
":LDPOL CG;:PDPOL AG" select the laser diode polarity and the
photodiode polarity.
Response messages
With response messages, measurement values and status information is transferred
to the PC. All response messages are generated when the query (program message)
is parsed.
Example:
[:ILD:ACT 7.123456E-05] measure the actual laser current
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