Filter
Top Products
3
SPECIFICATIONS
3.6 Details of Buffer Memory
3.6.4 LRDP instruction receive request/receive result/work area
3 - 22
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
FUNCTIONS
5
PREPARATORY
PROCEDURES BEFORE
OPERATION
6
LINK DATA SEND/
RECEIVE PROCESSING
AND PROCESSING TIME
7
PROGRAMMING
8
TROUBLESHOOTING
3.6.4 LRDP instruction receive request/receive result/work area
When a device read (LRDP instruction) is requested to a Q series local station from the
master station, execute receive processing to the LRDP instruction in a sequence
program.
CHAPTER 7 PROGRAMMING
The following shows operations of a local module at the time of receiving the LRDP
instruction.
Figure 3.9 Operation of local module at the time of receiving LRDP instruction
0 END 0 END
LRDP
0 END 0 END
100
100
0 END 0 END 0 END
0 END 0 END
100
0 END
Read command
Read completion device
Read data storage device
CPU moduleCPU module
Sequence scan
Link moduleLink module
Refresh ready status (X7)
Sequence scan
Read data (B4
H or later)
Local moduleLocal module
LRDP instruction receive request
(AC
H
)
5 (Processing completed)
(1 scan)
CPU moduleCPU module
Link scan
Read data storage device
4 (Processing
requested)