13. Troubleshooting
13-99
13.2.4.2 Digital module troubleshooting
Perform digital module troubleshooting according to Table 13-45.
Table 13-45 Digital input module troubleshooting
Operational error
Check
Corrective action
No input points are
ON.
Are there any mistakes in the terminal
block installation?
Correctly install the terminal block.
Are the screws used to install the
module loose?
Tighten the screws used to install the module.
Have you forgotten to supply the
externally input power?
Supply the power.
Is the externally supplied electrical
voltage too low?
Raise the voltage.
Is the internally supplied electrical
voltage too low? (Voltage check
terminal of the power module)
Replace the power module.
Are there any problems in the external
cabling?
Correct the cabling.
Only a particular input
point is not ON.
Is the terminal block (connector)
loose?
Correctly install the terminal block.
Is the terminal block (connector)
broken?
Replace the terminal block.
Is the externally input ON time too
fast?
Adjust the external device.
Are any cables loose or disconnected? Correct the cabling.
Are there any problems with the I/O
address of the program?
Correct the address.
No input points are
OFF.
Are there any problems in the external
cabling?
Correct the cabling.
Is there an error in the external device? Adjust the external device.
Input changes
irregularly between
ON and OFF.
Is the external input voltage too low?
Raise the external voltage.
Have you taken corrective action with
respect to noise?
Take corrective action to prevent noise, such as
installing a surge absorber and separating the input
cables.
Only a particular input
point is not OFF.
Are there any problems in the external
cabling?
Correct the cabling.
Is there an error in the external device? Adjust the external device.
Errors other than the
above
Does the error persist, even after the
above corrective action has been
taken?
Replace the relevant module.
Summary of Contents for S10VE
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