Siemens SINAMICS G120 Original Instructions Manual page 171

Table 7- 25
Exception
code
01
02
03
04
Maximum processing time, p2024[0]
The slave-response time is the time in which the Modbus master expects a response to a
request. Set the same slave-response time (p2024 [0] in the inverter) in the master and
slave.
Process data monitoring time (setpoint timeout), p2040
"Setpoint timeout" (F1910) is issued by the Modbus if p2040 is set to a value > 0 ms and no
process data is requested within this time period.
The "Setpoint timeout" only applies for access to process data (40100, 40101, 40110,
40111). The "Setpoint timeout" is not generated for parameter data (40200 ... 40522).
Note
Adjust the time (factory setting = 100 ms) depending on the number of slaves and the baud
rate set on the bus.
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
Overview of exception codes
Modbus name
Illegal function code
Illegal Data Address
Illegal data value
Server failure
Remark
An unknown (unsupported) function code was sent to the
slave.
An invalid address was requested.
An invalid data value was detected.
Slave has terminated during processing.
Configuring the fieldbus
7.6 Communication via RS485
171