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7
PROGRAMMING
7.2 Program for Refresh and for Receiving LRDP/LWTP Instruction
7 - 6
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
(c) Program example
Figure 7.7 Program example
Transfers W to the local module.
Transfers B to the local module.
At power-on, or at STOP to RUN of the CPU
module, turns on RUN status and refresh request.
Refresh request
RUN status
No refresh request
In refresh ready status, starts refresh.
Refresh in execution
Obtains the presence or absence status of the
refresh information table.
W transmission (First half):
Start No.=Z0, No. of words=Z1
Transfers W of the host station to the local module.
(First half)
W transmission (Latter half):
Start No.=Z0, No. of words=Z1
Y device transmission:
Start No.=Z0, No. of words=Z1
Transfers W of the host station to the local module.
(Latter half)
B transmission (First half):
Start No.=Z0, No. of words=Z1
Transfers Y of the host station to the local module.
Transfers B of the host station to the local module.
(First half)
Divides the buffer memory address by 16 (bits).
Divides the buffer memory address by 16 (bits).
Saves the relevant device data in the save area.
At power-on, initializes B/W devices.