Troubleshooting For Each Phenomenon - Mitsubishi NZ2GF2B-60DA4 User Manual

11.6

Troubleshooting for Each Phenomenon

This section describes troubleshooting for each phenomenon.
Perform troubleshooting for each phenomenon when the D/A converter module does not operate properly with no
error. When an error occurs in the D/A converter module, identify the error cause with GX Works2.
(1) When the analog output value is not output
Check item
Is there any problem with wiring, such as off or
disconnection of analog signal lines?
Is the CPU module in the STOP status?
Is the offset/gain setting correct?
Is the output range setting correct?
Is D/A conversion disabled for the channels where the
analog value is to be output?
Is CH Output enable/disable flag (RY10 to RY13)
set to OFF for the channels where the analog value is
to be output?
Is a digital value written to the channel to output the
analog value?
Is Initial data setting request flag (RY9) executed?
If the analog output value cannot be output even after the above actions are taken, the D/A converter module may be failed.
Please consult your local Mitsubishi representative.
(2) When the analog output value is not held
Check item
Is the setting for the analog output HOLD/CLEAR
function correct?
Check the faulty area by checking signal line visually or conductively.
Change the status of the CPU module to RUN.
Check if the offset/gain setting is correct.
When the user range setting is selected, change the output range to the factory
default setting. Then check if the D/A conversion is executed. If the D/A
conversion is properly executed, configure the offset/gain setting again.
Check Range setting (address: 0103
instruction.
When the output range setting is wrong, set the range again with the program or
the parameter setting.
Check D/A conversion enable/disable setting (address: 0102
the dedicated instruction. Then, set the D/A conversion enable with the program or
the parameter setting.
Check the setting for CH Output enable/disable flag (RY10 to RY13) on the
monitor of GX Works2.
When CH Output enable/disable flag (RY10 to RY13) is off, check the program
again.
Check the setting for CH Digital value (RWw2 to RWw5) on the monitor of GX
Works2.
Check if the analog value is output properly after turning on and off Initial data
setting request flag (RY9) in GX Works2.
When the output is performed properly, check the program again.
Set HOLD for the analog output HOLD/CLEAR function using GX Works2. Also,
check the setting value for Analog output HOLD/CLEAR setting (address: 0104
CHAPTER 11 TROUBLESHOOTING
Action
) with GX Works2 or the dedicated
H
) with GX Works2 or
H
Action
11
).
H
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