Table of Contents
Advertisement
6.4
Troubleshooting
This section provides a flowchart on the procedures for troubleshooting when recovering errors and when
errors occur.
As the EH-OLNK is equipped with e bypass function, it is possible to replace modules with units other than
link modules without amending the architecture of the link system. (Note that it is necessary to terminal link
system operations temporarily when replacing link modules.)
* You must supply 5VDC from the outside to make a bypass function effective.
6.4.1
Self-diagnosis errors
It is possible to detect errors and make recovery decisions with the use of the link module's ERR LED when
errors occur with link modules. In addition to this, '59H' (link module error) is set in the special WRF000
internal output (self-diagnosis error code) of the CPU module onto which the link module has been installed
when errors occur.
6.4.2
Error troubleshooting by error
The procedures for resolving each type of error are explained below.
When station No.0 is not exist, the link operation will not start but own error information(WRF0E0,
WRF140) is H0000. Namely, the information of no station No.0 is not stored in own error information.
At this time, RUN LED turns off or flickers every 0.5 s.
Before the check by below flow chart, confirm if station No.0 exists.
(1) Watchdog timer errors, ROM/RAM errors
ERR LED
Light
Check to ascertain if the power supply
has been switched on and off several
times.
Does this happen frequently?
NO
It may be assumed that this is a
temporary problem caused by noise,
etc. Switch the power supply on and off
(or press the reset switch,) and then
observe developments.
* The CPU module will detect a "Link Module Error (error code: 59H)" when the
reset switch is pressed. Resolve the CPU module error after the link module
resumes normal operations when the reset switch has been pressed.
Chapter 6. Errors and error recovery
YES
Replace the module with a spare one,
if available.
Notify your local authorized distributor
of it
6-3
Advertisement
Table of Contents
