Siemens SINAMICS DCM Operating Instructions Manual page 396

Descriptions of functions
10.6 Parallel operation of communication interfaces
Parameter
p8839 PZD Interface hardware assignment
Description: Assigning the hardware for cyclic communication via PZD interface 1 and interface 2.
Values: 0: not active
1: Communication interface integrated in the Control Unit
2: Option board
99: Automatic
The following rules apply to the setting of p8839:
● The setting of p8839 applies to all DOs of a CU (device parameter).
● For the setting p8839[0] = 99 and p8839[1] = 99 (automatic assignment, default), the
● An alarm is issued if the same hardware (onboard or COMM board) is selected in
● With the setting p8839[x] = 2 and the COMM board missing / defective, the respective
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assignment will be made on the basis of the plugged hardware. To render this automatic
assignment active, it must be selected for both indexes; otherwise an alarm is generated,
and the setting p8839[x] = 99 is treated in the same manner as 'not active'.
p8839[0] and p8839[1]. In this case, the setting of p8839[0] is effective. The setting of
p8839[1] is treated as 'not active'.
interface is not automatically fed by the onboard interface. Message A08550 is output
instead.
Operating Instructions, 1.2012, C98130-A7066-A1-05-7619
SINAMICS DCM DC Converter