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3
SPECIFICATIONS
3.6 Details of Buffer Memory
3.6.5 LWTP instruction receive request/receive result/work area
3 - 24
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
3.6.5 LWTP instruction receive request/receive result/work area
When a device write (LWTP instruction) is requested to a Q series local station from the
master station, execute receive processing to the LWTP instruction in a sequence
program.
CHAPTER 7 PROGRAMMING
The following shows operations of a local module at the time of receiving the LWTP
instruction.
Figure 3.10 Operation of local module at the time of receiving LWTP instruction
0 END 0 END
LWTP
0 END 0 END
100
0 END 0 END 0 END
0 END 0 END
100
0 END
100
Write command
Write completion device
Write data storage device
CPU moduleCPU module
Sequence scan
Link moduleLink module
Refresh ready status (X7)
Sequence scan
Write data (DC
H or later)
Local moduleLocal module
LWTP instruction receive request
(AE
H)
5 (Processing completed)
(1scan)
CPU moduleCPU module
Link scan
Write data storage device
4 (Processing
requested)