Mitsubishi Electric MELSEC iQ-R Series User Manual page 97

• When 'Output setting during synchronization error' (Un\G9532) is set to Synchronization stop (1)
Inter-module
synchronization cycle
Inter-module synchronous
interrupt program
'CH1 Synchronization
digital value' (Un\G9500)
D/A
conversion
Analog output value
in CH1
'Synchronization status
Inter-module synchronization target (during synchronization) (2)
monitor' (Un\G9600)
Inter-module synchronous interrupt program (I44)
(1) A cycle crossing occurs since the D/A conversion has been processed across the inter-module synchronization cycle. After that, the D/A converter module
immediately stops the synchronized operation.
When a cycle crossing has occurred, follow the methods below to resolve the issue.
• The inter-module synchronization cycle may be shorter for the time needed for the D/A conversion. Set a
longer inter-module synchronization cycle so that the D/A conversion is completed within the inter-module
synchronization cycle.
• The possible cause is that the execution time for an inter-module synchronous interrupt program (I44) is
longer. Correct settings such as reducing the number of steps of the inter-module synchronous interrupt
program (I44).
Inter-module synchronization cycle
1A
D/A
conversion
Analog output value of 1A
2A 3A
(1)
D/A
conversion
Analog output value while the
synchronization is being stopped
Inter-module synchronization target
(synchronization stopped) (1)
1.15 Inter-Module Synchronization Function
1
1 FUNCTIONS
95