Proline Promass E 300 Modbus RS485
Diagnostics and troubleshooting
Hauser
141
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 → 126.
No write access to parameters
Current user role has limited access
authorization
1. Check user role → 56.
2. Enter correct customer-specific
access code → 56.
No connection via Modbus RS485
Modbus RS485 bus cable connected
incorrectly
Check terminal assignment
→ 33.
No connection via Modbus RS485
Modbus RS485 cable incorrectly
terminated
Check terminating resistor
→ 42.
No connection via Modbus RS485
Incorrect settings for the
communication interface
Check the Modbus RS485
configuration → 78.
Not connecting to Web server
Web server disabled
Using the "FieldCare" or "DeviceCare"
operating tool, check whether the
Web server of the measuring device
is enabled, and enable it if
necessary→ 63.
Incorrect setting for the Ethernet
interface of the computer
1. Check the properties of the
Internet protocol (TCP/IP)
→ 59→ 59.
2. Check the network settings with
the IT manager.
Not connecting to Web server
Incorrect IP address
Check the IP address:
192.168.1.212 → 59→ 59
Not connecting to Web server
Incorrect WLAN access data
• Check WLAN network status.
• Log on to the device again using
WLAN access data.
• Verify that WLAN is enabled on
the measuring device and
operating device → 59.
WLAN communication disabled
–
Not connecting to Web server,
FieldCare or DeviceCare
No WLAN network available
• Check if WLAN reception is
present: LED on display module
is lit blue
• Check if WLAN connection is
enabled: LED on display module
flashes blue
• Switch on instrument function.
Network connection not present or
unstable
WLAN network is weak.
• Operating device is outside of
reception range: Check network
status on operating device.
• To improve network
performance, use an external
WLAN antenna.
Parallel WLAN and Ethernet
communication
• Check network settings.
• Temporarily enable only the
WLAN as an interface.
Web browser frozen and operation
no longer possible
Data transfer active
Wait until data transfer or current
action is finished.
Connection lost
1. Check cable connection and
power supply.
2. Refresh the Web browser and
restart if necessary.
Content of Web browser
incomplete or difficult to read
Not using optimum version of Web
server.
1. Use the correct Web browser
version → 58.
2. Clear the Web browser cache and
restart the Web browser.
