125
Outputs Don’t Turn ON
The output indicators on the E5ZD can be used to see when outputs turn ON.
The following are the probable causes of output problems.
Possible cause
Remedy
Reference
No external power supplied to open-collector
outputs.
Wire correctly.
Page 42
Control
Outputs
The voltage is falling when the output is ON,
because the output current exceeds the rating.
To avoid internal damage, reduce current to within speci-
fication range.
App. A
Power supply polarity is reversed.
Wire correctly.
Sec. 1-4-1
Pin numbers are incorrect.
Wire correctly.
Page 45
Table for
pin alloca-
tion
Internal circuitry damaged because a relay was
connected with no diode to the output.
Repairs to E5ZD are required.
Page 42
Control
Outputs
Excessive current flowing to alarm output due
to faulty wiring.
Alarm outputs have no protective circuits, so care is re-
quired when connecting them. If there has been internal
damage, repairs are required.
Sec. 1-4-1
Memory bank designation is incorrect.
Correct the designation.
When contact inputs are designated, the same memory
banks are valid for all points.
Check whether inputs are continued at time of contact
input designation. Inputs must be continued during des-
ignation.
Sec. 1-4-1,
3-3
Point designation is incorrect.
Make correct designation. Begin from point No. 0.
Sec. 4-2-1
Control not starting.
Begin control.
Sec. 4-2-6
Sensor disconnected or short-circuited.
Replace sensor.
Sec. 4-2-9
Controlled temperature setting is incorrect.
Correct the setting.
Sec. 4-2-2
Switches set to halt operation after power inter-
ruptions.
Restart operation or change switch setting.
Sec. 2-1-5
Control is executed with the wrong memory
bank.
Correct the host program.
Sec. 3-3
Power not supplied to I/O Relay Terminal.
Provide the specified fixed power supply.
Sec. 2-3-6
G79-
jjj
is not being used for connecting
with I/O Relay Terminal.
Use the specified cable.
Sec. 2-3-1,
2-3-2
Attempt is being made to designate memory
bank with communications, but setting is for
designation by contact inputs.
Correct the setting with the DIP switch.
Sec. 3-3
Attempt is being made to designate memory
bank with contact inputs, but setting is for des-
ignation by communications.
Correct the setting with the DIP switch.
Sec. 3-3
Troubleshooting Lists
Section 6-1
Содержание E5ZD
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