Communication via RS485
5.4 Communication using Modbus RTU
Fieldbuses
Function Manual, 04/2018, FW V4.7 SP10, A5E34229197B AE
129
Interconnecting analog outputs
If you set communication via Modbus (p2030 = 2), then the analog outputs of the inverter are
internally interconnected with the fieldbus analog outputs:
● p0771[0] = 791[0]
● p0771[1] = 791[1].
The values for p0791[0] and p0791[1] are written via registers 40523 and 40524.
Interconnections between parameter p0791 and other sources are rejected.
This means that the control outputs system-specific values via the analog outputs of the
inverter.
However, if you still wish to display an inverter-specific value, then you must adapt the
appropriate wiring.
● AO 0 should display the value written via the control with register 40523. In this particular
case, no other settings are required in the inverter.
● AO 1 should display the smoothed current actual value. To do this, you must set
p0771[1] = 27 (r0027 smoothed current actual value).
In this case, a write access via register 40524 to p0791[1] results in a fault message in
the control.
Note
Reset to the factory setting for Modbus
If you have set communication via Modbus (p2030
= 2), when restoring the factory settings,
again interconnected with p0771[0] = 791[0] and p0771[1] = 791[1].
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