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8.1 Communication Between CPU Module and Intelligent Function Modules
8.1.5 Communication by instructions for Intelli. function modules
8
COMMUNICATION WITH INTELLIGENT FUNCTION
MODULE
8.1.5 Communication by instructions for Intelli. function modules
(1) Description of the instructions dedicated for intelligent function
modules
The instructions dedicated for intelligent function modules are the instructions that
facilitate programming using the functions of the intelligent function modules.
(a) Example of serial communication module dedicated instruction (OUTPUT
instruction)
Use of the OUTPUT instruction allows communication with the external device by
the no-procedure protocol without being conscious of the buffer memory address
of the serial communication module.
[Transmission by OUTPUT instruction]
(2) Processing of intelligent function module dedicated instruction
Some intelligent function module dedicated instructions allow the completion device
to be specified.
This completion device turns ON in one scan when the execution of the instruction is
completed.
To use two or more instructions dedicated for intelligent function modules to one
intelligent function module, be sure to execute the next instruction dedicated for
intelligent function modules after the completion device turns ON.
Figure 8.8 Communication with external device using OUTPUT instruction
b15 b0
to
S2
+0
+1
+2
CPU module Serial communication Module
Channel 1
Channel 2
Set the channel
to use by
control data
Send,
transmit
Send,
transmit
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