Uss Process Data Channel (Pzd); Time-Out And Other Errors - Siemens SINAMICS G120 Original Instructions Manual

Configuring the fieldbus
7.6 Communication via RS485
7.6.2.5

USS process data channel (PZD)

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.
Figure 7-14
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).
You define the sources of the PZD using parameter p2051.
For further information, please refer to the List Manual.
7.6.2.6

Time-out and other errors

You require the telegram runtimes in order to set the telegram monitoring. The character
runtime is the basis of the telegram runtime:
Table 7- 15
Baud rate in bit/s
9600
19200
38400
115200
158
Process data channel
Character runtime
Transmission time per bit
104.170 µs
52.084 µs
26.042 µs
5.340 µs
Character run time (= 11 bits)
1.146 ms
0.573 ms
0.286 ms
0.059 ms
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG