Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 273

No analog output
■No analog output when the normal output mode is selected
Check item
Check whether the 24 V DC external power supply is supplied.
Check whether there is any problem with the wiring, such as looseness or
disconnection of analog signal lines.
Check whether the CPU module is in the STOP state.
Check whether the offset/gain setting in the user range setting is correct.
Check whether the output range setting is correct.
For the desired channel for output, check whether the CH D/A conversion
enable/disable is set to D/A conversion disable.
For the desired channel for output, check whether 'CH Output enable/
disable flag' (Un\G70, b1 to b4) is set to OFF.
Check whether the digital value writing program has an error.
Check whether 'Operating condition setting request' (Un\G70, b9) has been
executed.
■No analog output when the wave output mode is selected
Check item
Check the connection Check whether the 24 V DC external power
method supply is supplied.
Checking the module Check whether the operation mode setting is
parameter settings of GX correct.
Works3
Check whether the output module setting is
correct.
Check whether the user range setting was
selected.
Action
Check 'External power supply READY flag' (Un\G69, b7). If it is off, supply 24
V DC to the external power supply terminal.
Identify the faulty area of signal lines by a visual check and continuity check.
Change the state of the CPU module to RUN.
Check that the offset/gain setting is correct.
If a user range setting is in use, change it to another default output range and
check that the D/A conversion is performed normally.
If the D/A conversion is correct, retry the offset/gain setting.
Check the CH Input range setting monitor with the GX Works3 monitor.
If the output range setting is incorrect, retry to set the GX Works3 output range
setting or CH Range setting.
Check CH D/A conversion enable/disable setting and set it to D/A
conversion enable using a sequence program or the GX Works3.
Check the ON/OFF setting of 'CH Output enable/disable flag' (Un\G70, b1 to
b4).
If 'CH Output enable/disable flag' (Un\G70, b1 to b4) is off, review the
sequence program. In addition, check whether the CPU module is in the
STOP state.
Check the CH Digital value using the GX Works 3 monitor (buffer memory
batch monitor). If the value as specified for the digital value has not been
stored, review the writing program.
By turning offonoff 'Operating condition setting request' (Un\G70, b9),
check whether the normal analog output is generated.
If it is normal, review the sequence program.
Action
Check 'External power supply READY flag' (Un\G69, b7). If it is off, supply 24
V DC to the external power supply terminal.
Check that Offset/gain setting mode flag (Un\G69, b10) is off, and the
operation mode setting is normal mode.
If the normal mode is not set, retry to set the operation mode to the normal
mode with the module parameter setting of GX Works 3.
Check the output mode to examine whether it is set to the wave output mode.
If the wave output mode is not set, retry to set the output mode to the wave
output mode with the module parameter setting of GX Works 3.
When the wave output mode is selected with the output mode setting, the
user range setting (current) or (voltage) cannot be selected as the output
range.
If the user range setting (current) or (voltage) was selected as the output
range, retry to select a range other than the user ranges.
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2.10 Troubleshooting
2