Mitsubishi Electric MELSEC iQ-R Series User Manual page 81

Operation
■Inter-module synchronization processing for the D/A converter module
When the D/A converter module is used in the synchronization normal output mode, 'CH1 Synchronization digital value'
(Un\G9500) is imported at the timing when the inter-module synchronous interrupt program is executed and the D/A
conversion is performed in the next inter-module synchronization cycle. By setting 'CH1 Synchronization digital value'
(Un\G9500) to multiple D/A converter modules using the inter-module synchronous interrupt program, the analog output can
be performed from the multiple modules at the same timing.
Ex.
The following figure shows the inter-module synchronization processing of two D/A converter modules (module A and module
B).
CH1 Synchronous
digital value
CH2 Synchronous
Module digital value
A
CH3 Synchronous
digital value
D/A conversion
processing
CH1 Synchronous
digital value
Module
CH2 Synchronous
B
digital value
CH3 Synchronous
digital value
D/A conversion
processing
CH1 Analog output
value
Module
CH2 Analog output
A
value
CH3 Analog output
value
CH1 Analog output
value
Module
CH2 Analog output
B
value
CH3 Analog output
value
(1) When the inter-module synchronous interrupt program is executed, the D/A converter module imports CH Synchronization digital value.
(2) The analog output is performed in the inter-module synchronization cycle after (1). The digital value to which the D/A conversion is performed is CH
Synchronization digital value set in the previous inter-module synchronization cycle.
(3) The values in CH Synchronization digital value are converted in analog in order of CH1, CH2, and CH3 at the start timing of the inter-module
synchronization cycle and the converted analog values are output sequentially. The values are output in analog from the channel 1 of the module A and
the channel 1 of the module B simultaneously.
Inter-module synchronization cycle
Synchronous interrupt program
(1)
CH1 CH1
Synchronous digital value 1 Synchronous digital value 2
CH2 CH2
Synchronous digital value 1 Synchronous digital value 2
CH3 CH3
Synchronous digital value 1 Synchronous digital value 2
(2)
CH1 CH2 CH3
CH1 CH1
Synchronous digital value 1 Synchronous digital value 2
CH2
CH2
Synchronous digital value 1 Synchronous digital value 2
CH3
CH3
Synchronous digital value 2
Synchronous digital value 1
(2)
CH1 CH2 CH3
Synchronous interrupt program
CH1
Synchronous digital value 3
CH2
Synchronous digital value 3
CH3
Synchronous digital value 3
CH1 CH2 CH3
CH1
Synchronous digital value 3
CH2
Synchronous digital value 3
CH3
Synchronous digital value 3
CH1 CH2 CH3
(3)
D/A converted value of CH1
Synchronous digital value 2
D/A converted value of CH2
Synchronous digital value 2
D/A converted value of CH3
Synchronous digital value 2
(3)
D/A converted value of CH1
Synchronous digital value 2
D/A converted value of CH2
Synchronous digital value 2
D/A converted value of CH3
Synchronous digital value 2
Output delay time
1.15 Inter-Module Synchronization Function
Synchronous interrupt program
CH1 CH2 CH3
CH1 CH2 CH3
D/A converted value of CH1
Synchronous digital value 3
D/A converted value of CH2
Synchronous digital value 3
D/A converted value of CH3
Synchronous digital value 3
D/A converted value of CH1
Synchronous digital value 3
D/A converted value of CH2
Synchronous digital value 3
D/A converted value of CH3
Synchronous digital value 3
Channel switching time
1 FUNCTIONS
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