Mitsubishi Electric MELSEC iQ-R Series User Manual page 530

■Calculating range
The following shows specification examples of the calculating range of Length.
Packet
element 1
Packet
Header
format
Example 1
Example 2
Example 3
Example 1: Calculating range when 1 and n are specified as the start and the end respectively.
Example 2: Calculating range when 3 and n-2 are specified as the start and the end respectively.
Example 3: Calculating range when 3 and n are specified as the start and the end respectively.
APPENDICES APPENDIX
528
Appendix 5 Operation Image and Data Structure of Predefined Protocol
Packet Packet
element 2 element 3
Length Static data
Calculating range when specifying 1 to n
Calculating range when specifying 3 to (n-2)
Calculating range when specifying 3 to n
Packet Packet
element n-2 element n-1
Variable Terminator
Packet
element n
Check code