150
Determining Errors from Indicators
Section 7-2
HFU
Status
Possible causes
Countermeasure
RUN
Green, flashing
There is an error in a channel
that is currently running.
Read status to determine the channel that has
an error and then determine the cause from the
status of the ERR and ALM indicators.
ERR
Red, flashing
There is an input error.
Check the wiring for the input to be sure it is
wired correctly, not broken, and not shorted.
Also check the input type.
An error has occurred for which
the Operation During Error
parameter is set to MV at PV
Error or Stop control.
Read status to determine the nature of the error
and take appropriate measures.
An error has occurred in commu-
nications with a connected TC4/
TC2.
Check the connection to the TC4/TC2 and take
appropriate measures.
ALM
Red, lit
One of the following alarms has
occurred: heater burnout alarm,
heater short alarm, or tempera-
ture alarm.
Read the Error Channel A to D and the Channel
Alarm Status to determine the channel with the
alarm and the nature of the alarm, and take
appropriate measures.
The power supply to the PLC
was interrupted after communi-
cations were established
between the PLC and EJ1G.
Supply power to the PLC.
If the Operation Command Response Bits in the
Programless Upload Area set in PLC memory
are EEEE, write FFFF to the Operation Com-
mand Request Bits to restart communications.
The communications cable was
broken after communications
were established between the
PLC and EJ1G.
Connect the cable.
If the Operation Command Response Bits in the
Programless Upload Area set in PLC memory
are EEEE, write FFFF to the Operation Com-
mand Request Bits to restart communications.
An error has occurred in pro-
gramless communications.
Check the following and correct any problems,
and then restart operation.
• Check the communications line lengths (trunk
and branch).
• Check the communications line for shorts,
breaks, or looseness.
• Check that terminating resistance is set only
on the ends on the trunk line.
• Check for excessive noise.
Содержание EJ1G
Страница 1: ...USER S MANUAL Modular Temperature Controllers for Gradient Temperature Control EJ1G Cat No H143 E1 01 ...
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Страница 53: ...32 Unit Configuration Examples Section 2 4 ...
Страница 69: ...48 Changing SPs During Operation Section 3 3 ...
Страница 81: ...60 Other Functions Section 4 5 ...
Страница 145: ...124 Other HFU Functions Section 5 7 ...
Страница 167: ...146 Detailed Description of Services Section 6 4 ...
Страница 189: ...168 Determining the Error from the Current Situation for Heater Burnout Alarm Errors Section 7 8 ...
Страница 229: ...208 Parameters That Can Be Allocated for Programless Communications Appendix ...
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