6RL SERIES OPERATION MANUAL
SECTION 7: REMOTE PROGRAMMING
Entire Contents Copyright
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 132 of 204
7.11
Information on Specific Registers
Many of the commands and register related options are self-explanatory, but not all of
them. Some of those that are not are described in this section.
7.11.1
Register 171
This allows to write and read an arbitrary string of up 40 characters, which can be used to
uniquely identify a unit amongst multiple units of the same model. It is permanently stored
after being written.
7.11.2
Register 408
This register defines the condition of the DC Input resp. DC input after the unit has been
powered. Register 408 is connected to the MENU setting “DC input after power on”
(electronic loads) resp. ”DC Input after power on” (power supplies). For units without a
setup menu this can only be configured via remote control.
7.11.3
Register 411
Described for SCPI “Commands for alarm management“ in section 7.12.17, “Alarm
Management Commands” on page 164.
When using ModBus, this register is intended to reset alarm bits as represented in the unit
status (register 505, see below). Until these are not reset, which is considered as an
acknowledgement, the bits from previously occurred alarms remain set, even if the alarms
are gone already. Alarms which are still present while register 411 is used to reset the alarm
bits will be excluded from resetting. There is an exception: the unit alarm OT (bit 19, over
temperature). This will be cleared automatically once the unit has cooled down. After
resetting the alarm bits, unit alarms can only be read in form of an alarm counter (registers
520 - 524).
7.11.4
Registers 500-503 (Set values)
These are the most important registers to work with, because they define the DC Input
values of voltage, current, power and resistance (where featured). With ModBus, any set
value is transmitted as percent value of the nominal unit values (0...100%), whereas for SCPI
real values are used.
Generally, before you can use R mode on unit where internal resistance mode, it has to be
activated (register 409), else the set value is ignored.
In PV function mode, the set value for current (register 501) is interpreted as irradiation
value, as long as the unit is in "PV mode". While the function is running, this register does
not define the current limit for the unit, but a parameter called irradiation, which is
commonly used in solar panel simulation. In manual operation, irradiation can be adjusted
in 1% steps between 0% and 100%. With the set value of current it is also 0-100%, according
to definition of register 501, but with a significantly higher resolution.
Summary of Contents for 6RL Series
Page 203: ......
