User's Manual

Table Of Contents
Page 87 SITRANS LR 460 – INSTRUCTION MANUAL 7ML19985JM01
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G: Troubleshooting
Appendix C: Troubleshooting
1. Check the following:
There is power at the instrument.
The LCD shows the relevant data.
Check whether any fault codes are being displayed (see
Acyclic Extended
Diagnostics (General Fault Codes)
on page 51 for a detailed list).
The device can be programmed using the handheld programmer.
2. Verify that the wiring connections are correct.
3. Check the PROFIBUS address and make sure all devices are at unique PROFIBUS
addresses.
4. If the device cannot be programmed via the handheld programmer, make sure local
operation is enabled. See
Local operation enable
on page 26. Also make sure that
Write Locking is Off. See
Write locking
on page 34.
5. If you try to set a SITRANS LR 460 parameter via remote communications, but the
parameter remains unchanged, make sure remote operation is enabled. See
Remote operation enable
on page 26. Also make sure that Write Locking is Off. See
Write locking
on page 27.
6. If you continue to experience problems, go to our website at www.siemens.com/
processautomation, and check the FAQs for SITRANS LR 200, or contact your
Siemens Milltronics representative.
7. If the PLC value equals the display value, but does not correspond to actual material
level, either:
scaling in AIFB1 is incorrect, or
High Calibration Point is incorrectly entered, or
the wrong echo is being selected.
8. If the PLC value is not equal to the displayed value (regardless of actual material
level), either:
you may not be looking at the right spot in the PLC, or
you may have programmed scaling into the PLC, instead of leaving all scaling to
be performed in the LR 200, or
the PLC may not be communicating with the LR 460. Check the network to verify
that you are communicating.