Omron E5AJ-A2H01, Operation Manual

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6-1 Error Display and Output
The Thermac E5 J Temperature Controller incorporates a self-diagnostic func-
tion. The following table lists the process values and outputs that the E5 J has
when errors result.
PV display Error Output Items to be checked
Control
output
Alarm
output
Abnormal input OFF (2 mA
max.) Processed
as an
abnormally
high
temperature.
•
Whether or not the input has exceeded the
possible controlling range (
±
10% of the set
temperature range) (see note).
•
Whether or not the setting of the input type is
incorrect.
•
Whether or not the input has been incorrectly
wired, broken, or short-circuited.
Abnormal memory OFF (2 mA
max.) OFF Turn the E5 J OFF and ON. If the display does
not change, the E5 J need repairs. If the display
returns to normal, the E5 J may have been
influenced by noise. Check for noise interference.
Abnormal A/D
converter OFF (2 mA
max.) OFF
Abnormal
calibration data.
Displayed for 2 s
when the E5
J is
turned on.
Normal operation (accuracy
not guaranteed) The E5 J needs calibration. Contact your
OMRON representative.
Note If the input is within the possible controlling range but exceeding the possible
display range (–1999 to 9999), (((( will be displayed if the value is smaller than
–1999 and
))))
will be displayed if the value is larger than 9999, at which time, the
control output and alarm output will work normally.
6-2 Troubleshooting
Refer to the following table for troubleshooting.
Phenomenon Probable cause Countermeasure
Nothing is displayed when the E5 J
is turned on.
The internal mechanism is not
inserted properly into the housing. Properly insert the internal mechanism
into the housing.
The power supply is not connected to
the power supply terminals properly. Properly connect the power supply to
the power supply terminals.
No power is supplied or the supplied
power is not within the specified
range. Supply a voltage of 85 to 264 VAC to
the power supply terminals of the
E5
J.
No setting is possible. The key protection switch is set to ON. Set the key protection switch to OFF.
The E5 J with a communications
function is in remote mode.
The E5 J must be in local mode or
no front key is available.
When the Up Key is pressed for set
point value setting, the value flashes
within the set temperature range and
the setting is not possible. The set point limit function is active. Properly set the set point lower limit
and set point upper limit values.
No alarm, heater current value display,
or heater burnout alarm is displayed. The alarm mode switch is set to 0. Select the proper alarm mode.
A Current Output Unit is used for
control output. No heater burnout is detected if the
Current Output Unit is used for control
output.
Troubleshooting
Section 6-2