● p2023 = 4:
If you want to read or write 32-bit values (for example indexed parameters or bit parameters,
e.g. r0722.2), then this setting is required. In this case, the send or receive telegram always
contains four words, even if only three would be required. The values are right-justified in the
4th word.
● p2023 = 127:
If you set p2023 = 27 (variable length), the send and response telegrams are as long as the
task actually requires.
Process data
Parameter p2022 defines the length for the process data. You can transfer up to eight process
data items in one telegram (p2022 = 0 … 8). For p2022 = 0, no process data is transferred.
Parameters
Parameter
Description
Factory setting
p2022
Fieldbus interface USS PZD number
2
p2023
Fieldbus interface USS PKW number
127
6.3.6.5
USS process data channel (PZD)
Function description
The process data channel (PZD) contains the following data depending on the transmission
direction:
● Control words and setpoints for the slave
● Status words and actual values for the master.
$QVZHU
WR866PDVWHU
5HTXLUHPHQW
WR866VODYH
3='
3='
3='
3='
3='
3='
3='
3='
3='
3='
S
S
=6:
+,:
=6:
S
67:
+6:
67:
Figure 6-20
Process data channel
The first two words are:
● Control 1 (STW1) and main setpoint (HSW)
● Status word 1 (ZSW1) and main actual value (HIW)
If p2022 is greater than or equal to 4, then the converter receives the additional control word
(STW2).
Advanced commissioning
6.3 Drive control
SINAMICS G120X converter
264
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
