Specifications

72
Reference Manual
00809-0100-2460, Rev AA
Section 6: Service and Troubleshooting
November 2014
Service and Troubleshooting
6.3 Troubleshooting
Table 6-1 provides summarized maintenance and troubleshooting suggestions for the most
common operating problems.
Table 6-1. Troubleshooting chart
Symptom Possible cause Action
No contact with the
Rosemount 2460 System Hub
Wiring
• Check that wires are properly connected to the terminals.
• Check for dirty or defective terminals.
• Check wire insulation for possible short circuits to ground.
• Check that the 2460 System Hub is connected to the right
communication port on the control room PC.
RS485 wiring
• Check for proper polarity at the terminals.
Field Bus Modem (FBM 2180)
• Check that the Tx and Rx LEDs on the FBM are blinking to
verify proper communication with the FBM.
• Check that the FBM is connected to the right port on the
control room PC.
• Check that the FBM is connected to the right port on the
2460 System Hub.
Connection to 2460 System
Hub
• Check communication port LED:s inside the 2460. Next to
each modem card is a green and a yellow LED for Tx and Rx
signals. The LEDs will blink if communication is working
properly.
Configuration of 2460 System
Hub
• Check the communication address for the 2460. Connect
a service PC to the Ethernet 3 port and open the Web
Interface>Communication tab.
• Check configuration of communication parameters for
the 2460 Host ports. Connect a service PC to the Ethernet
3 port and open the Web Interface>Communication tab.
• Check that the correct communication channel is
selected.
Configuration of
communication protocol
In TankMaster WinSetup/Protocol Channel Properties:
• check that the protocol channel is enabled
• check the protocol channel configuration (port,
parameters, modem).
Wrong communication settings Use TankMaster to check communication settings.
For TRL2 modems: Baud Rate=4800, Data bits per
character=8, Stop bits=1, no parity.
See Table 4-1 on page 4-48.
Connected to wrong modem
slot
Check which modem is used. Port 7-8 are used for
Host communication. Ports 5-6 can be used for Host
or field device communication depending on
configuration.
Hardware failure
• Check the 2460 System Hub; check the Error LED for
information.
• Check the Field Bus Modem.
• Check the communication port on the control room PC.
• Contact Emerson Process Management/Rosemount
TankGauging service department.