Block Assurance - Mitsubishi Electric MELSEC iQ-R RJ71SEIP91-T4 User Manual

9.2

Block Assurance

This function guarantees the I/O data of Class1 communications between the CPU module and the CIP Safety module.
By enabling this function, the I/O data inconsistency can be prevented.
In standard communications, whether or not to guarantee I/O data is determined according to the parameter settings of the
engineering tool.
In safety communications, I/O data is guaranteed regardless of the parameter settings of the engineering tool.
Behavior
When block assurance is enabled, block assurance is applied to I/O data for both write processing to the buffer memory and
read processing from the buffer memory.
CPU module
Device
Connection No.1
(4 words)
Data assurance
Connection No.3
(128 words)
Connection No.2
(32 words)
Connection No.3
Data assurance
(128 words)
Connection No.4
(12 words)
The range in which block assurance is applied is the range set for the auto refresh target of the following buffer memory. Block
assurance is applied per input area and output area. (Not applied per connection)
• 'Class1 Input Area' (Un\G24576 to Un\G57343, Un\G1073152 to Un\G1105919)
• 'Class1 Output Area' (Un\G61440 to Un\G94207, Un\G1110016 to Un\G1142783)
Setting method
For the setting method, refer to the following.
Page 37 Basic Setting
Precautions
• If this function is not enabled for standard communications, I/O data may be separated into new data and old data during
auto refresh.
• If this function is enabled for standard communications, the transmission delay time will be longer.
CIP Safety module
Buffer memory
Connection No.1
(4 words)
Refresh
Connection No.3
(128 words)
Connection No.2
(32 words)
Connection No.3
Refresh
(128 words)
Connection No.4
(12 words)
Data assurance
Data assurance
9.2 Block Assurance
9
9 FUNCTIONS
107