APS 6RL Series, Руководство по эксплуатации

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6RL SERIES OPERATION MANUAL
SECTION 7: REMOTE PROGRAMMING
Entire Contents Copyright
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2018 by Adaptive Power Systems, Inc. (APS) • All Rights Reserved • No reproduction without written authorization from APS.
6RL Series Regenerative DC Load Operation Manual Page 140 of 204
7.12 SCPI Command Language
The SCPI standard does not define the use of a termination character and thus, models
supporting SCPI do not expect one. Exception to this are units with Opt GPIB interface. See
7.12.2, “SCPI Command Syntax” on page 141 for termination character information.
Note: With other interfaces like Ethernet, messages could be fragmented or merged (TCP)
or when sent as single characters via serial ports communication errors can occur,
which are put into the error queue and are not returned automatically. In such
cases, it is recommended to add a termination character.
Set Value Formats
In the SCPI command language, all commands are text based and values are real values,
usually without a unit. This means that if you want to set a current of, for example, 177.5 A,
you would use the simple command CURR 177.5. Below you will find more detailed
information about the available commands and the syntax.
All set values (U, I, P, R), which have dedicated single command which you can send to the
unit during remote control. Values are not only limited by the maximum, i.e. nominal values
of your particular unit model, but are limited by those adjustment limits “Limits” that you
can define for manual adjustment, i.e. user limit settings.
7.12.1 SCPI Examples
IDN Query
It is always recommended to ping a unit first, in order to test if it responds at all. With SCPI,
this is done by querying the identification string:
Protocol Command
SCPI *IDN?
As an immediate response, the unit might send, for example:
Protocol Response
SCPI Adaptive Power Systems, 6RL15-510-80-4, 1240210002, V2.14 14.05.2018 V2.24
04.06.2018 V1.6.5
Switching between Remote and Manual Control
Before you can remotely control a unit, you need to switch it to remote control by sending
the dedicated command. See the SCPI command description below.
The unit will not switch to remote control automatically and cannot be remotely controlled
without being in this condition. Reading status and values is but always possible.
The unit will not exit remote control automatically, unless it is switched off or the AC sup-
ply is otherwise interrupted. Remote control can be exited by a certain command. It then
switches back to manual control.
Switching to remote control may be inhibited by several circumstances and is usually
indicated by an error message: