Determining Errors From Indicators - Omron EJ1 User Manual

Determining Errors from Indicators

7-2

Determining Errors from Indicators

Status
PWR Not lit
RUN Not lit
ERR Not lit
ALM Not lit
PWR Green, flashing 0.5 s
RUN ---
ERR Red, lit
ALM ---
PWR Green, flashing 1 s
RUN Not lit
ERR Red, lit
ALM ---
PWR Green, lit
RUN Not lit
ERR Red, lit
ALM Not lit
TC4/TC2
Status
RUN Green, flashing
ERR Red, flashing
ALM Red, lit
The following table shows indicator status, possible error causes, and coun-
termeasures.
Possible causes
There is no power supply.
The power supply voltage is out-
side the allowable range.
The Unit is malfunctioning.
The Unit is malfunctioning.
The settings data is corrupted.
The Unit configuration informa-
tion is corrupted (Basic Units
only).
The Unit is malfunctioning.
A Unit is not connected correctly. Check Unit models and the order of connection.
The registered Unit configura-
tion does not match the actual
Unit configuration (Basic Units
only).
The same unit number is set for
more than one connected G3ZA
(Basic Units only).
There is an error in a connected
G3ZA (Basic Units only).
In addition to the above, the status of the following indicators can be used to
determine the cause of and countermeasures for errors.
Possible causes
There is an error in a channel
that is currently running.
There is an input error or a
remote SP input error.
An error has occurred for which
the Operation During Error
(Selection B) parameter is set to
MV at PV Error or Stop control.
An error has occurred in commu-
nications with a connected
G3ZA.
One of the following alarms has
occurred: heater burnout alarm,
heater short alarm, or heater
overcurrent alarm.
Countermeasure
Check to see if the Units are linked properly.
Adjust the voltage to within the range.
Replace the Unit.
Cycle the power supply. If the problem persists,
replace the Unit.
Send the Parameter Initialization operation com-
mand to initialize the parameters and then set
them again.
Send the Register Unit Configuration: Reset
operation command and then cycle the EJ1
power supply.
Replace the Unit.
Restore the registered Unit configuration or re-
register the configuration.
Correct the G3ZA unit number settings and then
cycle the power supply.
Refer to the G3ZA User's Manual (Cat. No.
Z200) and take the required countermeasures.
Countermeasure
Read status to determine the channel that has
an error and then determine the cause from the
status of the ERR and ALM indicators.
Check the wiring for the input or remote SP
input to be sure it is wired correctly, not broken,
and not shorted. Also check the input type.
Read status to determine the nature of the error
and take appropriate measures.
Check the connection to the G3ZA and take
appropriate measures.
Read the Error Channel A Status, the Channel
Status, and the Channel Alarm Status to deter-
mine the channel with the alarm and the nature
of the alarm, and take appropriate measures.
Section 7-2
165