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CHAPTER7 COMMUNICATIONS WITH INTELLIGENT FUNCTION MODULE
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7.1 C
ommunications between C
P
U Module and Intelligen
t Functio
n Module
7.1.4 C
ommunications using th
e
intelligen
t funct
ion mod
ule de
vice
7.1.4 Communications using the intelligent function module device
(1) Intelligent function module device
The intelligent function module device (
Section 9.5.1) represents the buffer memory of the intelligent
function module as one of the CPU module devices.
The data stored in the buffer memory of the intelligent function module can be treated by the sequence instruction
as well as the device memory.
A programming example is given below for the case where "100" is written to the buffer memory of an address 0
of the intelligent function module whose I/O number is X/Y20 to X/Y2F.
(2) Difference from the FROM and TO instructions
The intelligent function module device processes data read from the intelligent function module with
one instruction as the device can be treated as one of the CPU module devices.
A program example is given below for the case where data read from the intelligent function module
are added and then the result is stored in D2.
This reduces the number of steps in whole program.
The instruction processing time indicates the time required for instruction execution and accessing the intelligent
function module.
Figure 7.4 Use of the intelligent function module device
Figure 7.5 Application example of the intelligent function module device
MOV K100 U2\G0
Buffer memory address
I/O number X/Y20
+ U2\G0 D0 D2
