B Troubleshooting - Omron CQM1 Operation Manual

Indicator Status During Normal Operation
: Lit, : Flashing, X: Not lit
Master
RDY T/R T/R
RDY
X
Any other indicator display indicates an error. Refer to the table below.
Indicator Alarm Table
The table below shows the description and remedy of an error occurring in the G730 Interface Unit.
: Lit, : Flashing, X: Not lit, "––": Status not relevant.
Error
RDY T/R T/R
RDY
Errors X –– ––
before or
after nor-
mal oper-
ation
–– X X
Errors X
before
normal
X
operation
X
Appendix B
Troubleshooting
Expansion
END NODE ALM RDY
X X
Master Expansion
Master
END NODE ALM RDY
–– –– – X
X X X ––
X ––
X ––
X ––
Slave
Master
T/R PWR T/R
Description
T/R
–– Power not turned on.
Units not completely connected.
End cover not attached.
–– Abnormal Master.
Slave address set between #28
and #30.
No terminator set.
Multiple terminators exists in a
system.
Different types of communica-
tions Master exist.
Transmission path shorted.
Transmission path discontinuity.
Transmission path + and –
wiring reversed.
Expansion Masters exist with
the same input/output type and
duplicate unit #.
Expansion Masters exist with
the same input/output type and
duplicate system address.
The Slave set as terminator is
not turned on.
The terminator is set to Slave
address #31.
Multiple terminators set
Comments
All T/R indicators flash.
Remedy
Turn the power on.
Refer to unit manual and correct
set up.
Turn power off and back on.
Replace Master if same error re-
occurs.
Set Slave address between #0
and #27.
Set the Slave connected at the
end as the terminator.
Only one terminator allowed per
system. Wire separate systems
with one Master each.
Do not mix Master (G7M21) with
different types of communica-
tions Master.
Correctly wire the transmission
path.
Correct settings to give unique
unit # and Slave address.
Turn on the terminator Slave.
Set terminator Slave address
between #0 and #27.
Set only the final Slave to termi-
nator.
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