Mitsubishi Electric MELSEC iQ-R Series User Manual page 99

■Operation when a synchronization loss occurs
The phenomenon that the D/A converter module cannot receive inter-module synchronization signals at a normal cycle, or
receives at the timing far from the timing of inter-module synchronization cycle is called "synchronization loss". When a
synchronization loss has occurred, an inter-module synchronization signal error (error code: 2610H) occurs. The
synchronization status of the D/A converter module when an error occurs becomes Synchronization stop or Synchronization
continue depending on the setting of 'Output setting during synchronization error' (Un\G9532).
The following shows the operation of the D/A converter modules of when a synchronization loss has occurred.
• When 'Output setting during synchronization error' (Un\G9532) is set to Synchronization continue (0)
Inter-module
synchronization cycle
Inter-module synchronous
interrupt program
'CH1 Synchronization
digital value' (Un\G9500)
Previous analog
Analog output value in CH1
output value
'Synchronization status
monitor' (Un\G9600)
Inter-module synchronous interrupt program (I44)
(1) A synchronization loss occurs when the D/A converter module cannot accept the inter-module synchronization cycle.
(2) When the D/A converter module did not accept the inter-module synchronization cycle at the timing when the inter-module synchronization cycle was
supposed to be accepted, an inter-module synchronization signal error (error code: 2610H) occurs, but the analog output is updated.
(3) Even if a synchronization loss occurs, D/A conversion is processed in the next inter-module synchronization cycle.
Inter-module synchronization cycle
1A
Analog output
value of 1A
Inter-module synchronization target (during synchronization) (2)
(1)
3A
2A
(2)
Analog output
value of 2A
1.15 Inter-Module Synchronization Function
1
Analog output
value of 3A
1 FUNCTIONS
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