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 186 of 204
7.15.4
Message examples
7.15.4.1
Switching to remote control
As described in section 7.9.5.1, “Switch to Remote Control or back to Manual Control“, it is
necessary to switch the unit to remote control before you can control it. In order to do this,
you first need to find the proper command, i.e. register in the register list resp. the
dedicated index in the EDS. In this case, it is register 402 (hex: 0x192). The register list
defines that the value 0xFF00 has to be sent to switch to remote or value 0x0000 to leave
remote control.
Assuming the unit would have been set to base ID 0x100, the data to be sent according
would be:
0x01
0x92
0x01
0xFF
0x00
Register/ Nr. of Bit (coil)
object regs for TRUE
The unit should then switch to remote control, if not inhibited somehow. The status of
remote control can be read from the display or by reading another object.
7.15.4.2
Write and read back a set value
After remote control has been accepted by the unit, you are allowed to send set values.
Those values usually represent a per cent value. From the definition in the register list, the
hexadecimal value 0xCCCC translates to 100% and 0x0000 to 0%. It means, there are 52428
possible values between 0% and 100%. It has to be pointed out here, that this is not the
resolution a unit value like voltage or current can have at the DC input/output. The effective
resolution of output/input values is 26214 steps. An example for set value translation is in
“Writing a set value“.
Power supply model 6RL03-170-80-2 has a nominal current of 170 A. If you wanted to set it
to 35 A, the set value according to the formula calculates as: 35 A * 52428 / 170 A = 10794 =
0x2A2A. The current is set with register 501. Assuming the unit would have been set to base
ID 0x88, the data to be sent to ID 0x88 according would be:
0x01
0xF5
0x01
0x2A
0x2A
Register/ Nr. of Set value
object regs current
As soon as the unit accepts the value, it is set and could be read from the display or by
reading it back using the same object. With the same base ID, the query message would be:
0x01
0xF5
Register
object
and would have to be sent to the query ID of the unit, here 0x89. Shortly after this, the unit
should respond with the requested value on the read ID 0x8A:
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