Communication Using The Instructions Dedicated For Intelligent Function Modules - Mitsubishi Electric MELSEC-Q Series User Manual

8 COMMUNICATION WITH INTELLIGENT FUNCTION MODULE

8.4 Communication Using The Instructions Dedicated for Intelligent Function Modules

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(1) Description of the instructions dedicated for intelligent function
modules
(a) The instructions dedicated for intelligent function modules are the
instructions that facilitate programming using the functions of the intelligent
function modules.
For example, the OUTPUT instruction, which is the instruction dedicated for
serial communication modules, allows data transmission in user-specified
message format with no handshaking protocol.
In this case, the communication is possible without considering the buffer
memory address of the objective serial communication module.
Basic model QCPU
b15
S2 +0
+1
+2
(b) A completion device should be designated for the instruction dedicated for
intelligent function modules.
The designated completion device turns ON for one scan when the
execution of the instruction dedicated for intelligent function modules is
completed.
When the completion device turns ON, another instruction dedicated for
intelligent function modules can be executed to the same intelligent function
module.
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.
(2) Instructions
(a) If the instruction dedicated for intelligent function modules are executed and
Basic model QCPU is switched from RUN to STOP before the completion
device turns ON, the completion device turns ON one scan later when
Basic model QCPU is switched to RUN next time.
REMARK
For the instruction dedicated for intelligent function modules and the completion
device, refer to the manual of the intelligent function module being used.
Serial communication module
b0
trans-
mission
Channel
1
trans-
mission
Channel
2
MELSEC-Q
set the channel
to use by control
data
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