When The Analog Output Is Not Performed - Mitsubishi Electric MELSEC iQ-R Series User Manual

When the analog output is not performed

Follow the steps in the table below to find the cause of the trouble.
Description
■Step 1: Checking the digital value
Check whether the digital value is written.
■Step 2: Checking the D/A conversion
status
Check the execution status of the D/A
conversion in the module, such as whether
the D/A converter module have executed
the D/A conversion.
Procedure
When a value is not output in analog
Check the value stored in 'CH1 Digital value'
(Un\G460).
Is the stored value
same as the set value?
YES
Ò
Ò
Check the value stored in 'CH1 D/A
conversion status monitor' (Un\G459).
Is External power supply
OFF (-1) stored?
*2
NO
Is D/A conversion
disabled (0) stored?
NO
Is Analog output
disabled (1) stored?
NO
Ó
Monitor the buffer memory area with the
*1
monitor function of the engineering tool.
The write program has an error or the CPU
module is in STOP status.
NO
Check item 1
Monitor the buffer memory area with the
*1
monitor function of the engineering tool.
The external power supply 24VDC is not
supplied.
YES
Check item 2
The D/A conversion is not enabled.
YES
Check item 3
The analog output is not enabled.
YES
Check item 4
3 TROUBLESHOOTING
3.3 Troubleshooting by Symptom
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