Omron CP1E-E14SDR-A - Outputs

6 Troubleshooting
6-16
CP1E CPU Unit Hardware User’s Manual(W479)
6-2-2 Outputs
No. Symptom Cause Remedy
1
Not all outputs turn ON 1. Load is not supplied with power. Supply power.
2. Load voltage is low. Adjust voltage to within rated
range.
3. Terminal block screws are loose. Tighten screws.
4. Unit failure caused by an overcurrent
(possibly caused by a short at the
load).
Replace Unit.
5. Faulty I/O bus connector contact. Replace Unit.
6. Faulty output circuit. Replace Unit.
7. If the INH indicator is lit, the Output
OFF Bit (A500.15) is ON.
Turn A500.15 OFF.
2
Not all outputs turn OFF Output circuit is faulty. Replace Unit.
3
Output of a specific bit
number does not turn ON
and indicator is not lit
1. Output ON time is too short because of
a mistake in programming.
Correct program to increase the
time that the output is ON.
2. Bit status controlled by multiple instruc-
tions in a ladder program.
Correct program so that each
output bit is controlled by only
one instruction.
3. Faulty output circuit. Replace Unit.
4
Output of a specific bit
number does not turn ON
(indicator lit).
1. Faulty output device. Replace output device.
2. Break in output wiring. Check output wiring.
3. Loose terminal block screws. Tighten screws.
4. Faulty output bit (relay output only). Replace Unit.
5. Faulty output circuit. Replace Unit.
5
Output of a specific bit
number does not turn OFF
(indicator is not lit).
1. Faulty output bit (relay output only). Replace Unit.
2. Bit does not turn OFF due to leakage
current or residual voltage.
Replace external load or add
dummy resistor.
6
Output of a specific bit
number does not turn OFF
(indicator lit).
1. Bit status controlled by multiple instruc-
tions in ladder program.
Correct the ladder program.
2. Faulty output circuit. Replace Unit.
7
Output irregularly turns
ON/OFF.
1. Low or unstable load voltage. Adjust load voltage to within
rated range.
2. Bit status controlled by multiple instruc-
tions in ladder program.
Correct program so that each
output bit is controlled by only
one instruction.
3. Malfunction due to noise. Take protective measures
against noise, such as:
• Install surge protector.
• Install insulation transformer.
• Use shielded cables between
the output terminal and the
load.
4. Terminal block screws are loose. Tighten screws.
8
Error occurs in units of 8
points or 16 points, i.e., for
the same common.
1. Common terminal screws are loose. Tighten screws.
2. An overcurrent (possibly caused by a
short at the load) resulted in a blown
fuse for the output.
Replace Unit.
3. Faulty data bus Replace Unit.
4. Faulty CPU Replace CPU Unit.
9
Output indicator does not
light during normal opera-
tion.
Faulty indicator. Replace Unit.