Diagnostics and troubleshooting
LPGmass Modbus RS485
58
Hauser
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
→ 26.
Green power LED on the main
electronics module of the
transmitter is dark
Power supply cable connected
incorrectly
Check the terminal assignment
→ 24.
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
→ 26.
Green power LED on Safety Barrier
Promass 100 is dark
Power supply cable connected
incorrectly
Check the terminal assignment
→ 24.
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
position → 52.
No connection via Modbus RS485
Modbus RS485 bus cable connected
incorrectly
Check terminal assignment
→ 24.
No connection via Modbus RS485
Modbus RS485 cable incorrectly
terminated
Check terminating resistor
→ 28.
No connection via Modbus RS485
Incorrect settings for the
communication interface
Check the Modbus RS485
configuration → 44.
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
Operation with FieldCare or
DeviceCare via CDI-RJ45 service
interface (port 8000)
Firewall of computer or network is
preventing communication
Depending on the settings of the
firewall used on the computer or in
the network, the firewall must be
adapted or disabled to allow
FieldCare/DeviceCare access.
Flashing of firmware with FieldCare
or DeviceCare via CDI-RJ45 service
interface (via port 8000 or TFTP
ports)
Firewall of computer or network is
preventing communication
Depending on the settings of the
firewall used on the computer or in
the network, the firewall must be
adapted or disabled to allow
FieldCare/DeviceCare access.
12.2 Diagnostic information via light emitting diodes
12.2.1 Transmitter
Different LEDs in the transmitter provide information on the device status.