192
6 INTER-MODULE SYNCHRONIZATION FUNCTION
Precautions
• Turn "[Cd.183] Execution prohibition flag" OFF after "[Md.503] Pre-reading data analysis status" is set to "2: Completed".
• Because each positioning module operates independently after starting, it operates as follows. (Even though an error
occurs and the module stops, the module where an error has not occurred continues to operate. Even though the stop
signal is input in the program at the same time, the detection timing of the stop signal may not be the same and the stop
position may differ.)
• When the inter-module synchronization is enabled, "[Cd.183] Execution prohibition flag" is read during the processing
caused by the interrupt of the inter-module synchronous interrupt (I44). Therefore, even if "[Cd.183] Execution prohibition
flag" is operated without the inter-module synchronous interrupt (I44), "[Cd.183] Execution prohibition flag" is not read. If
the inter-module synchronous interrupt (I44) is used, the processing is executed without any operation of "[Cd.183]
Execution prohibition flag" in the event. However, the inter-module synchronization start is not guaranteed.
• When the inter-module synchronous interrupt (I44) exceeds the internal operation process time of the Simple Motion
module, the warning "Inter-module synchronization cycle time over" (warning code: 0CC0H) occurs. Even at the time, the
module where an error has not occurred continues to operate.
■
RD77MS16 operation example
t
v
Simple Motion
module 1
Standby
Analyzing
Standby
t
v
[Cd.183] Execution
prohibition flag
Positioning control
Positioning start signal
[Y10-Y1F]
[Md.503] Pre-reading data
analysis status
[Md.26] Axis operation
status
Standby
Standby
Analyzing
Completed
Standby
Analyzing
Positioning
data
analysis
Analyzing
Standby
Waiting for
an execution
prohibition OFF
Completed
Simple Motion
module 2
[Cd.183] Execution
prohibition flag
Positioning control
Positioning start signal
[Y10-Y1F]
[Md.503] Pre-reading data
analysis status
[Md.26] Axis operation
status
Inter-module
synchronization
cycle
Inter-module
synchronization
cycle
Inter-module
synchronization
cycle
Inter-module
synchronization
cycle
Inter-module
synchronization
cycle
Position control
Position control
Positioning
data
analysis
Waiting for
an execution
prohibition OFF
Summary of Contents for RD77MS16
Page 1: ...MELSEC iQ R Simple Motion Module User s Manual Application RD77MS2 RD77MS4 RD77MS8 RD77MS16 ...
Page 2: ......
Page 316: ...314 9 COMMON FUNCTIONS 9 4 External Input Signal Select Function Program example ...
Page 317: ...9 COMMON FUNCTIONS 9 4 External Input Signal Select Function 315 9 ...
Page 575: ...13 PROGRAMMING 13 4 Positioning Program Examples 573 13 Error reset program Axis stop program ...
Page 643: ......