User's Manual

Page 106 SITRANS LR560 (PROFIBUS PA) – OPERATING INSTRUCTIONS 7ML19985LT01
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B: Troubleshooting
Appendix B: Troubleshooting
Communication Troubleshooting
1. Check the following:
• There is power at the instrument.
• The LCD shows the relevant data.
• The device can be programmed using the hand-held programmer.
• If any fault codes are being displayed see
Acyclic Extended Diagnostics
(General Fault Codes) on page 138 for a detailed list.
2. Verify that the wiring connections are correct.
3. Check the PROFIBUS address and make sure all devices are at unique PROFIBUS
addresses.
4. See the table below for specific symptoms (continued on next page).
If you continue to experience problems, go to our website at: www.siemens.com/LR560
,
and check the FAQs for SITRANS LR560, or contact your Siemens Milltronics
representative.
Symptom Corrective action
The device cannot be
programmed via the hand-
held programmer.
•Make sure Write Protection (6.2.1.) on page 101 is set to the
unlock value.
You try to set a SITRANS
LR560 parameter via remote
communications but the
parameter remains
unchanged.
• Ensure Remote Lockout (6.1.1.) on page 101 is disabled.
• Ensure Write Protection (6.2.1.) on page 101 is set to the
unlock value.
• See To reset the PROFIBUS address to 126: on page
55 to disable an address lock.
The PLC value equals the
display value but does not
correspond to actual material
level.
• Ensure Scaling in AIFB1 is correctly entered.
• Ensure High Calibration Point is correctly entered.
• View the echo profile to see if the wrong echo is
being selected. If so, see
Operation Troubleshooting
on page 112 for possible causes and corrective
action.
The PLC value is not equal to
the displayed value
(regardless of actual material
level).
• Confirm you are looking at the right spot in the PLC.
• Ensure scaling has not been programmed into the
PLC: all scaling should be performed by the LR560.
• Check the network to ensure the PCL is communicat-
ing with the LR560.