TE Technology TC-24-25 - Manual (Page 19)

19
APPENDIX D RS-485 Troubleshooting Guide
For troubleshooting always set the RS-485 port to 00, until correct communication is established.
You can perform a quick check of the comm. port (without having to initialize variables) by clicking the
“CommCheck” button in the PC COMMUNICATIONS section of the software screen. You should have
the controller connected to a comm. port and the controller powered up when performing the comm.
check. A “COMM ERROR!” message will show if there is no hookup. If the connection is good a
“COMM OKAY” message will quickly appear.
When you initialize, an error message my show up if there is any additional problems. The following
table offers possible solutions corresponding to a particular error:
Error Message
Possible Cause Solution
Comm Port Timeout No power to TC-24-25 unit Apply power to TC-24-25, review
customer-hookup drawing for proper
hookup.
Comm Port Timeout RS-485 Address is wrong Set to 00 the universal address.
Comm Port Timeout Wrong Comm Port selected Check computer hardware setting and set to
the correct Comm Port.
Comm Port Timeout Comm Port is not connected to
converter or computer. Check for correct connection of the
converter to the computer, review converter
specifications & computer for proper
hookup.
Comm Port Timeout Incorrect wiring of Comm Port
to the converter or computer. Check for correct wiring of the converter to
the
computer, review converter
specifications & computer for proper
hookup.
Comm Port Timeout Converter is not connected to
TC-24-25. Check for correct connection of the
converter to TC-24-25, review converter
specifications
& TC-24-25 customer
drawing for proper hookup.
Comm Port Timeout Incorrect wiring of the
converter to TC-24-25
Check for correct wiring of the converter to
TC-24-25, review converter specifications
& TC-24-25 customer drawing for proper
hookup.
Comm Port Open
Error
No Comm Port available at this
port setting. Check computer hardware setting and set to
the correct Comm Port.
Note: See also Appendix F, Section III RS485 or RS232 Communications Parameters regarding the
insertion of a delay between sending characters if you are using your own software program.