Troubleshooting By Symptom - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

Troubleshooting by Symptom

When the PWR LED does not turn ON
Check item
Whether the power is supplied
Whether the FX5-4DA-ADP is attached normally to the CPU module
When the analog output value is not given
Check item
Whether the analog signal cable is connected normally to the FX5-4DA-ADP
Whether the external equipment is wired correctly
Whether 24 V DC is supplied as the external power to the FX5-4DA-ADP
Whether the "D/A conversion enable/disable setting" is set to "enable" for the
channel to be used
Whether the "D/A output enable/disable setting" is set to "enable" for the
channel to be used for output
Whether the digital value is written to the channel to be used for output
When the analog output value does not change
Check item
Whether the CPU module operation status is "STOP" or "STOP (by stop
error)"
When a value is not converted into the expected analog output value
Check item
Whether the output range is set correctly
Whether the offset/gain is set correctly
Whether the scaling function is set correctly
Whether the shift function is working with a proper setting value
Whether a digital value above the warning output upper limit value or below
the warning output lower limit value is set
3 FX5-4DA-ADP
124
3.7 Troubleshooting
Action
Check whether the voltage supplied to the FX5-4DA-ADP is within the rated
range.
Check the FX5-4DA-ADP attached status.
Action
Check the signal cables visually, and wire the analog signal cable correctly.
Wire the external equipment correctly to the FX5-4DA-ADP.
Supply 24 V DC to the FX5-4DA-ADP.
Check the "D/A conversion enable/disable setting" for the channel to be used
in the parameter setting of GX Works3, and set "enable" in the parameter of
GX Works3 or in the program.
Check the "D/A output enable/disable setting" for the channel to be used in
the parameter setting of GX Works3, and set "enable" in the parameter of GX
Works3 or in the program.
Check the digital value in GX Works3.
Action
The analog output HOLD/CLEAR function is being executed.
Set the CPU module to the "RUN" status, and check whether analog output is
given normally. When an error causing stop occurs, remove the cause of the
error, and then turn OFF and ON the CPU module or reset the CPU module.
Action
Check the output range setting in the parameter setting of GX Works3. If the
contents of setting are wrong, set the output range again.
Check whether the offset/gain is set correctly.
Check whether D/A conversion is executed correctly.
When D/A conversion is executed correctly, set the offset/gain again.
When the scaling function is used, check the scaling function setting in the
parameter setting of GX Works3. If the contents of setting are wrong, set the
scaling function again.
Set the input value shift amount suitable for the system.
When the warning output function is used, check the warning output function
setting in the parameter setting of GX Works3. When the contents of setting
are all right, check whether the digital value is not set outside the warning
output range.