Input Units - Omron SYSMAC C200HS Installation Manual

Input Units

6-6

Input Units

Error
Indicator lights are turned off, and no
inputs turn ON. pu s u O
Indicator lights are turned ON, but no
inputs turn ON.
All inputs remain ON, and will not turn
OFF.
Inputs do not turn ON for particular p p
R l Relay numbers. b
Inputs do not turn OFF for particular p
R l Relay numbers. b
Inputs are turning ON and OFF p g
i irregularly. l l
Malfunctioning Relays are in groups of g y
eight. i h
Operation is normal, but the input
indicator does not light.
82
Probable cause
No external input power supply is
provided.
The external input voltage is low.
Terminal screws are loose.
Terminal block connectors are making
poor contact.
The input circuit is defective.
The input circuit is defective.
An input device is defective.
Input wiring is disconnected.
Terminal screws are loose.
Terminal block connectors are making
poor contact.
The ON time for external inputs is too
short.
The input circuit is defective.
An input bit address is used for an
OUT instruction in the program.
p
The input circuit is defective.
An input bit address is used for an
OUT instruction in the program.
The external input voltage is low.
There is malfunctioning due to noise.
Terminal screws are loose.
Terminal block connectors are making
poor contact.
g p
Common terminal screws are loose.
Terminal block connectors are making
poor contact.
The CPU is defective.
The LED is defective.
Section 6-6
Possible correction
Provide a power supply.
Supply the rated voltage.
Tighten the terminal screws.
Securely lock the connectors, or
replace them if necessary.
Replace the Unit.
Replace the Unit.
Replace the input device.
Check the input wiring.
Tighten the terminal screws.
Securely lock the connectors, or
replace them if necessary.
Adjust the input device.
Replace the Unit.
Correct the program.
Replace the Unit.
Correct the program.
Supply the rated voltage.
Apply noise countermeasures such as
installing a surge suppressor,
installing an isolation transformer, and
using shielded cables.
Tighten the terminal screws.
Securely lock the connectors, or
replace them if necessary.
Tighten the terminal screws.
Securely lock the connectors, or
replace them if necessary.
Replace the CPU.
Replace the Unit.