Omron CQM1H - 08-2005, Operation Manual

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Appendix B
Troubleshooting
56
Error Remedy Description Expansion
Master
Master
T/R RDY ALM NODE END T/R T/R
RDY
RDY
Errors
before
normal
operation
f f Y
X
Y
––
f Y
Input/output type of
Master/Expansion Master
differs from input/output type of
the corresponding Slave. Match input/output type of
Master/Expansion Master to
input/output type of the
corresponding Slave.
Expansion Masters exist with
different input/output type but
duplicate unit #. Expansion Masters exist with
different input/output type but
duplicate Slave address.
Correct settings to give unique
unit # and Slave address.
A 4-point unit is set between
#24 and #27. The #24 to #27 area is
reserved for 8-point and
16-point units. Set 4-point units
between #0 and #23.
Transmission to Slaves whose
addresses are set correctly is possible
for this display status. Slaves with errors
can be identified by checking the T/R
indicators, which will be lit on Slaves
with errors. The Slave address of an
8-point unit is set to an odd
value between #0 and #23.
The Slave address of a
16-point unit is set to an odd
value between #0 and #27. Refer to Word Allocations and
correct the Slave address.
Duplicate bit addresses set for
4-, 8-, and 16-point units.
Errors
after
normal
f
X
f
X –– ––
f fY
Transmission path shorted.
Transmission path
discontinuity. Correctly wire the transmission
path.
operation
X Power off at Slave. Turn on the Slave power
supply.
Slave CPU out of control Turn Slave power off and back
on. Replace Slave if same error
re-occurs.
f f Y
X X
f f Y
Error occurred in the output of
a Slave with error detection
function. Replace defective relay or
normally return load line.
Note The error check shown in the table above is conducted when the CQM1H/CQM1 is turned on (even if the
CQM1H/CQM1 is not in RUN mode). The indicator display on the CQM1H/CQM1 CPU is unrelated to the
indicator display on the G730 Interface Unit.
System Error
The error shown below is a CQM1H/CQM1 error which prevents CQM1H/CQM1 operation.
Error Description Cause Remedy
I/O Unit
overflow An I/O overflow error occurred
in the CPU. The total number of I/O words in
the system exceeds the
maximum I/O words of the CPU. Correct the system, referring to
1-2 System Configuration and
4-1 Word Allocation.
Operation Flowchart and Indicator Status
The indicator status are shown below after CQM1H/CQM1 power on, during normal operation, and after an error.
Status Master Expansion
Master
RDY T/R
RDY
T/R END NODE ALM RDY T/R
CQM1H/CQM1 power on X X X X X X X X
CQM1H/CQM1 initial check OK
f
X
Y f
X X
f
X
G730 transmission line check – terminator found
f
*
f
*
Y
* X* X* X*
f
*
Y
*
Note *Normal operation status