6RL SERIES OPERATION MANUAL
SECTION 7: REMOTE PROGRAMMING
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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 165 of 204
7.12.18
Application Examples
This section provides several examples of using advanced functions using SCPI Commands.
7.12.18.1
Configure and control master-slave with SCPI
Units which feature true master-slave (short: MS) with summing via a dedicated master-
slave bus also support full remote configuration and control of the system. In a MS system,
usually only the master unit is remotely controlled, while the slaves are not connected to
the PC and so cannot be configured remotely. It is thus recommended to configure the MS
system on the front panels of the units and only put the master into remote control via any
software. Even if you would configure all units manually on the control panel, the remote
control software could later read the status of the MS init from the master. The initialization
of the MS system is done automatically every time the master is powered, but can be
triggered and repeated by command.
Let's assume the following example configuration: five loads model 6RL15-510-80-4 (80 V,
510 A, 15 kW) in parallel. The master has to display itself as an 80V, 2550 A and 75 kW unit
after successful configuration and initialization.
These values are also the nominal values of the MS system, used to limit the values you can
send by SCPI command. The same way as with manual control, the "Limits" and set values
can be adjusted in 0...102% of nominal, while protection values allow for 0..110%.
The step-by-step guide below is separated into several parts, because some are optional.
Part 1a: Configure the master
1.
Activate remote control: SYST:LOCK˽ON
2.
Activate master-slave mode: SYST:MS:ENABLE˽ON
3.
Define the unit as master: SYST:MS:LINK˽MASTER
4.
(when running two-quadrants operation and the master in an electronic load): Set
the master as Share bus slave: SYST:SHAR:LINK˽SLAVE
Part 1b: Configure the slave, in case it is connected to the controlling unit (PC, PLC etc.)
5.
Activate remote control: SYST:LOCK˽ON
6.
Activate master-slave mode: SYST:MS:ENABLE˽ON
7.
Define the unit as slave: SYST:MS:LINK˽SLAVE
If there is more than one slave, repeat steps 4-7 for the other slave(s) with their own
addresses.
Part 2: Initialize the MS system
8.
Activate remote control, in steps 1-7 were not processed, because system was
already configure: SYST:LOCK˽ON
9.
Trigger initialization, then wait a few seconds: SYST:MS:INIT
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