7ML19985CL02
SITRANS LR 300 – INSTRUCTION MANUAL
Page 91
m
mmmm
Troub
leshoot
in
g
Troubleshooting
Communication Troubleshooting
Generally:
1.
Check the following:
• There is power at the unit
• The LCD shows the relevant data
• The device can be programmed using the hand programmer
2.
Check the wiring pin-outs and verify that the connection is correct.
3.
Verify that values in set-up parameters P770 to P773 match the settings in the
computer communicating with the unit.
4.
Check that the port you are using on the computer is correct. Sometimes trying a
different Modbus driver will solve the problem. An easy stand-alone driver called
ModScan32 is available from Win-Tech at www.win-tech.com. We have found that
this driver is useful to test communications.
Specifically:
If you try to set an SITRANS LR 300 parameter via remote communications, but the
parameter remains unchanged:
•
Some parameters can only be changed when the device is not scanning. Try putting
the device in program mode using the operating mode function.
•
Try setting the parameter from the keypad. (First make sure that the lock parameter
[P000] is set to
1954
.)
•
The communications control parameter P799 must be set to
1
to be able to write
parameters to the SITRANS LR 300.
SITRANS LR 300.book Page 91 Monday, June 10, 2002 7:18 PM
Summary of Contents for SITRANS LR 300
Page 1: ...SITRANS LR 300 Instruction Manual ITRANS LR 30 July 2002 ...
Page 14: ...Page 12 SITRANS LR 300 INSTRUCTION MANUAL 7ML19985CL02 mmmmm Specifications ...
Page 46: ...Page 44 SITRANS LR 300 INSTRUCTION MANUAL 7ML19985CL02 mmmmm Start Up ...
Page 96: ...Page 94 SITRANS LR 300 INSTRUCTION MANUAL 7ML19985CL02 mmmmm Troubleshooting ...
Page 136: ...Page 134 SITRANS LR 300 INSTRUCTION MANUAL 7ML19985CL02 mmmmm Appendix VIII ...
Page 139: ......