System Error - Omron CQM1H series Operation Manual

Troubleshooting
Error
RDY T/R T/R
RDY
f f Y
Errors
before
normal
operation
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.
f f
Errors X
after
normal
operation
f f Y
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
I/O Unit An I/O overflow error occurred
overflow in the CPU.
Operation Flowchart and Indicator Status
The indicator status are shown below after CQM1H/CQM1 power on, during normal operation, and after an error.
Status
CQM1H/CQM1 power on
CQM1H/CQM1 initial check OK
G730 transmission line check – terminator found
Note *Normal operation status
56
Master Expansion
Master
END NODE ALM RDY
Y f
X ––
f
X –– ––
f f
X X
Description
RDY
X
f
f*
Description
T/R
Y
Input/output type of
Master/Expansion Master
differs from input/output type of
the corresponding Slave.
Expansion Masters exist with
different input/output type but
duplicate unit #.
Correct settings to give unique
unit # and Slave address.
A 4-point unit is set between
#24 and #27.
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.
Duplicate bit addresses set for
4-, 8-, and 16-point units.
fY
Transmission path shorted.
Transmission path
discontinuity.
X Power off at Slave.
Slave CPU out of control
Y
Error occurred in the output of
a Slave with error detection
function.
Cause
The total number of I/O words in
the system exceeds the
maximum I/O words of the CPU.
Master
T/R T/R END
RDY
X X X
Y f
X
f* Y*
X*
Appendix B
Remedy
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 Slave address.
The #24 to #27 area is
reserved for 8-point and
16-point units. Set 4-point units
between #0 and #23.
Refer to Word Allocations and
correct the Slave address.
Correctly wire the transmission
path.
Turn on the Slave power
supply.
Turn Slave power off and back
on. Replace Slave if same error
re-occurs.
Replace defective relay or
normally return load line.
Remedy
Correct the system, referring to
1-2 System Configuration and
4-1 Word Allocation.
Expansion
Master
NODE ALM RDY
X X X
f
X X
f*
X* X*
T/R
X
X
Y*