Diagnostics and troubleshooting
Proline Promass F 100 Modbus RS485
76
12
Diagnostics and troubleshooting
12.1 General troubleshooting
For output signals
Error
Possible causes
Solution
Green power LED on the main
electronics module of the
transmitter is dark
Supply voltage does not match the
value indicated on the nameplate.
Apply the correct supply voltage .
Green power LED on the main
electronics module of the
transmitter is dark
Power supply cable connected
incorrectly
Check the terminal assignment
→ 29.
Green power LED on Safety Barrier
Promass 100 is dark
Supply voltage does not match the
value indicated on the nameplate.
Apply the correct supply voltage .
Green power LED on Safety Barrier
Promass 100 is dark
Power supply cable connected
incorrectly
Check the terminal assignment
→ 29.
Device measures incorrectly.
Configuration error or device is
operated outside the application.
1. Check and correct parameter
configuration.
2. Observe limit values specified in
the "Technical Data".
For access
Error
Possible causes
Solution
No write access to parameters
Hardware write protection enabled
Set the write protection switch on
main electronics module to the
OFF
No connection via Modbus RS485
Modbus RS485 bus cable connected
incorrectly
Check terminal assignment
→ 29.
No connection via Modbus RS485
Device plug connected incorrectly
Check the pin assignment of the
connector → 32.
No connection via Modbus RS485
Modbus RS485 cable incorrectly
terminated
Check terminating resistor .
No connection via Modbus RS485
Incorrect settings for the
communication interface
Check the Modbus RS485
configuration → 57.
No connection via service interface
Incorrect configuration of USB
interface on PC or driver not
installed correctly.
Observe the documentation for the
Commubox.
FXA291: Document
"Technical Information"
TI00405C
Not connecting to Web server
Incorrect IP address
Check the IP address:
192.168.1.212