Modbus RTU Interface Module for SED2
Technical Instructions
Document Number 155-767
February 25, 2009
Siemens Industry, Inc.
Page 7
SED2 Parameter
Configuration
The Interface Module communicates with the SED2 VFD using the USS protocol
and the following parameter configuration:
•
USS address set to 0
•
USS baud rate set to 19.2K
•
Parity set to Even
•
Number of data bits set to 8
Configure SED2 VFD parameters to communicate with the MicroGate II, per Table 3.
Table 6. SED2 Parameter Settings to Communicate with the MicroGate II.
SED2
Parameter
Function
Setting/Value
P0003
User Access Level
3 (Expert Level)
P0700[0]
Command Source
5 if Starting/Stopping VFD from Modbus;
otherwise, DO NOT change.
P1000[0]
Frequency Setpoint
Source
5 if Setting the Frequency from Modbus;
otherwise, DO NOT change.
P2009[0]
USS Normalization
0 (Disabled)
P2010[0]
USS Baud Rate
7 (19.2K baud)
P2011[0]
USS Address
0
P2014[0]
USS telegram off time
0 to Disable the USS Watchdog timer.
100 or greater to enable the USS Watchdog
timer.
NOTE:
Do not set to a value from 1 to 99.
P2041[0]
Protocol Selection for
RS485 port
0 (USS Protocol)
