Siemens Sinamics G120P Operating Instructions Manual page 234

Operation
6.8 Communication via RS485
A character delay time is also permitted between the individual bytes of a frame.
Maximum duration: Processing time for 1.5 bytes (can be set via p2024[1]).
Table 6- 20
Baud rate in bit/s (p2020)
4800
9600
19200 (factory setting)
38400
57600
76800
93750
115200
187500
Note
The factory setting for p2024[1] and p2024[2] is 0. The inverter specifies the associated
values depending on the protocol selection (p2030) or the baud rate.
Modbus register and Control Unit parameters
The Modbus protocol contains register or bit numbers for addressing memory. You must
assign the appropriate control words, status words and parameters to these registers in the
slave.
The inverter supports the following addressing ranges:
Addressing range
40001 ... 40065
40100 ... 40522
The valid holding register addressing range extends from 40001 to 40522. Access to other
holding registers generates the fault "Exception Code".
The registers 40100 to 40111 are described as process data.
Note
"R"; "W"; "R/W" in the "Modbus access" column stands for read (with FC03); write (with
FC06); read/write.
234
Baud rates, transmission times, and delays
Transmission time per
character (11 bits)
2.292 ms
1.146 ms
0.573 ms
0.286 ms
0.191 ms
0.143 ms
0.117 ms
0.095 ms
0.059 ms
Remark
Compatible with Micromaster MM436
Minimum pause be- Maximum pause be-
tween two telegrams tween two bytes
(p2024[2]) (p2024[1])
≥ 8.021 ms ≤ 3.438 ms
≥ 4.010 ms ≤ 1.719 ms
≥ 1.75 ms ≤ 0.859 ms
≥ 1.75 ms ≤ 0.75 ms
≥ 1.75 ms ≤ 0.556 ms
≥ 1.75 ms ≤ 0.417 ms
≥ 1.75 ms ≤ 0.341 ms
≥ 1.75 ms ≤ 0.278 ms
≥ 1.75 ms ≤ 0.171 ms
Operating Instructions, 12/2014, A5E32923362A
Inverter cabinet units