Rockwell Automation 1788-EN2PAR EtherNet/IP and ControlNet to PROFIBUS PA Linking Device User Manual - Manual (Page 52)

52 Rockwell Automation Publication 1788-UM058B-EN-P - September 2014
Chapter 4 Diagnostics
Field Device is Not
Configured Use these diagnostic checks to help you identify and fix the problem when the
field device is not configured.
Field Device Faults Use these diagnostic checks to help you identify and fix the problem when the
field device indicates faults.
Table 5 - Field Device is Not Configured Diagnostic Checks
Symptoms Checks
The field device is attached but is not producing process variables
in the controller.
Devices are blue or switch blue/red. This condition usually
indicates the configuration is incorrect. Verify that the field device configuration is correct.
Certain field devices require an output process variable (for example, a set-point for valve positioner) to stay
connected.
If the configuration is incorrect, the field device switches between green and blue. The field device indicates
green after it is configured, but changes to blue (not-configured) when it does not receive any process variables.
See the manual for the field device for more information regarding PROFIBUS PA configuration.
See all checks in Field Device is Not Detected on page 50 .
Table 6 - Field Device Faults Diagnostic Checks
Symptoms Checks
The field device indicates red in the AOP.
The field device indicates Err on LCD of module.
No process variable is found in the process variable tag of the field
device.
Verify that the field device has power.
If a display is present, verify that the display is illuminated.
If no display is present, use a voltmeter to check the voltage across the PA terminal in the field device (verify
correct polarity). See the field device manual to see minimum input voltage. The longer the cable and the bigger
the load (number of field devices and junction boxes), the bigger the voltage drop across the cable.
See
Cable Lengths on page 20 and Table 1 on page 19 for a description of cable length guidelines.
Verify that the cable is not damaged or is not near a source of noise.
Replace a damaged cable, and route the cable away from any source of noise.
Read the status indicators on the junction box (if short-circuit protection is provided and indicated).
Verify that the linking device can see the field device when doing a scan in the AOP?
If the linking device cannot see the field device, see all checks in
Field Device is Not Detected on page 50 .
Check the field device
PV status in the
Studio 5000 Logix
Designer application.
If the field device has
an error that affects
the PV, the PV status
changes from GOOD
to UNCERTAIN or BAD.