System Error - Omron CQM1 Operation Manual

Troubleshooting
Error
RDY T/R T/R
RDY
Errors
before
normal
operation
Transmission to Slaves whose addresses
are set correctly is possible for this dis-
play status. Slaves with errors can be
identified by checking the T/R indicators,
which will be lit on Slaves with errors.
Errors X
after nor-
mal oper-
ation
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 overflow An I/O overflow error occurred 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
60
Master Expansion
Master
END NODE ALM RDY
X ––
X –– ––
X X
Description
RDY
X
*
Description
T/R
Input/output type of Master/
Expansion Master differs from
input/output type of the corre-
sponding 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.
Transmission path shorted.
Transmission path discontinuity.
X Power off at Slave.
Slave CPU out of control
Error occurred in the output of a
Slave with error detection func-
tion.
Cause
The total number of I/O words in
the system exceeds the maxi-
mum I/O words of the CPU.
Master
T/R T/R
RDY
X X X
X
* * X*
Appendix B
Remedy
Match input/output type of Mas-
ter/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 nor-
mally return load line.
Remedy
Correct the system, referring to
1-2 System Configuration and
4-1 Word Allocation.
END NODE ALM
X X X
X X
X* X*
Expansion
Master
RDY T/R
X
X
* *