Inter-Module Synchronization Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

1.15

Inter-Module Synchronization Function

This function allows the D/A conversion values to be output at the same timing from multiple modules in which the inter-
module synchronization function is active.
The analog output timing of each module is determined by the inter-module synchronization cycle set with the system
parameter.
Setting procedure
■Setting system parameters
For the setting of the system parameters, refer to the following.
 MELSEC iQ-R Inter-Module Synchronization Function Reference Manual
■Setting module parameters
• Output setting during synchronous error
Select whether to continue or stop the synchronization of the D/A converter modules when an inter-module synchronization
cross-cycles processing error (error code: 2600H) or inter-module synchronization signal error (error code: 2610H) occurs.
• Operation mode setting
Select "Normal mode (D/A conversion process)".
• Output mode setting
Select "Normal output mode".
• Analog output HOLD/CLEAR function setting
The operation differs from the one in the normal mode. For the difference of the operations performed depending on the
setting details of the HOLD/CLEAR setting, refer to the following.
Page 21 In the synchronization normal output mode
■Setting a synchronization digital value
When the synchronization normal output mode is used, 'CH1 Synchronization digital value' (Un\G9500) is output in analog.
Set 'CH1 Synchronization digital value' (Un\G9500) with an interrupt program.
For the setting of interrupt programs, refer to the following.
 MELSEC iQ-R CPU Module User's Manual (Application)
■Setting the inter-module synchronization cycle
Set the inter-module synchronization cycle that establishes the following relation.
(Inter-module synchronization cycle) > (Run time of the inter-module synchronous interrupt program + Sampling cycle)
Ex.
When the D/A conversion is enabled in CH1 to CH3 and disabled in CH4
Sampling cycle = 80s  3CH = 240s
When the above relation is not established and one of the following operations is performed, an inter-module synchronous
cycle time setting enable lower limit shorter error (error code: 1EA0H) occurs and the inter-module synchronization function
does not operate.
• When the CPU module status is changed from STOP to RUN ("D/A conversion enable/disable setting" set with the module
parameter is applied.)
• When 'Operating condition setting request' (Y9) is turned off and on
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1.15 Inter-Module Synchronization Function