Siemens G120P Technical Manual page 57

Siemens
Building Technologies
USS protocol
Parameter Description
p0015 Select value 108 "USS fieldbus" during basic commissioning.
p2020 Value
4
5
6
7
8
9
10
11
12
13
p2021 Valid USS addresses: 1...30
Invalid USS addresses: 0.31...127
p2022 Fieldbus interface USS PZD number
● Setting the number of 16-bit words in the PZD part of the USS telegram
p2023 Fieldbus interface USS PKW number
● Setting the number of 16-bit words in the PKW part of the USS telegram
0
3
4
127
Modbus RTU protocol
Parameter Description
p0015 Select value 109 "Modbus RTU" during basic commissioning.
p2021 Valid Modbus RTU addresses: 1...247
Invalid Modbus RTU address: 0
p2020 Fieldbus baud rate
● Baud rates from 4800 bps to 187500 bps can be set for communication.
● Factory setting: 19200 bps
p2024 Modbus timing
● Index 0: Maximum slave telegram processing time
Maximum response time from the slave to the master.
● Index 1: Character delay time
Maximum permissible delay time between the individual characters in the
Modbus frame (Modbus standard processing time for 1.5 bytes).
● Index2: Inter-telegram delay
Maximum permissible delay time between Modbus telegrams (Modbus
standard processing time for 3.5 bytes).
p2029 Fieldbus error statistics
● Displays receive errors on the fieldbus interface.
P2031 Modbus parity
p2040 Process data monitoring time [ms]
● Setting the time to monitor the process data received. If no process data is
received within this time, an appropriate message is output
● Factory setting: 100 ms
● The setting 0 ms deactivates the monitoring function.
Commissioning
Configuring communication
Baud rate
2400
4800
9600
19200
38400
57600
76800
93750
115200
187500
0 Wörter
3 Wörter
4 Wörter
Variable Anzahl Wörter
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2016-03-17