Mitsubishi Electric MELSEC iQ-R Series User Manual page 96

Data consistency area
This area is used to maintain data consistency.
For details on the data consistency dedicated instruction, refer to the following.
 MELSEC iQ-R Programming Manual (Module Dedicated Instructions)
■Data consistency setting (Un\G1587)
Set whether to enable the data consistency for refresh or the data consistency dedicated instruction.
• b0: Data consistency dedicated instruction setting for the master function
• b1: Data consistency dedicated instruction setting for the slave function
• b2 to b7: Not used (Fixed to 0)
• b8: Data consistency setting for refresh
• b9 to b15: Not used (Fixed to 0)
Set this area before turning on 'I/O communication request' (Y11).
The following table lists the setting values and available dedicated instructions.
: Available, : Not available
Setting value
0000H (Default value)
0001H
0002H
0003H
0100H
• Precautions
When the master function is used, disable the data consistency dedicated instruction setting for the slave function.
If the I/O communication is stared with the data consistency dedicated instruction setting for the slave function enabled, an
error occurs.
Check the communication error code and take action. ( Page 59 Error code for module diagnostics (own node error),
Page 62 Event code (other node error))
When the slave function is used, disable the data consistency dedicated instruction setting for the master function.
If the I/O communication is stared with the data consistency dedicated instruction setting for the slave function enabled, an
error occurs.
Check the communication error code and take action. ( Page 59 Error code for module diagnostics (own node error))
■Data consistency setting status (Un\G1588)
The setting status of the data consistency for refresh and the data consistency dedicated instruction is stored.
• b0: Master function data consistency dedicated instruction setting status
• b1: Slave function data consistency dedicated instruction setting status
• b2 to b7: Not used (Fixed to 0)
• b8: Data consistency setting status for refresh
• b9 to b15: Not used (Fixed to 0)
The value to be set and usable dedicated instruction are the same as those of 'Data consistency setting' (Un\G1587). (
Page 94 Data consistency setting (Un\G1587))
APPX
94
Appendix 3 Buffer Memory
Usable dedicated instruction
Master function
DNTMRD DNTMWR
 
 
 
 
 
Slave function
DNTSRD DNTSWR
 
 
 
 
 
Data consistency
for refresh




