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MELSEC-Q
8 COMMUNICATION WITH INTELLIGENT FUNCTION MODULE/SPECIAL
FUNCTION MODULE
8.1.5 Communication using the instructions dedicated for intelligent function modules
(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.
b15
b0
S2
+0
+1
+2
QCPU
Serial communication module
trans-
mission
set the channel
to use by control
data
Channel
1
Channel
2
trans-
mission
(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) Note
(a) If the instruction dedicated for intelligent function modules are executed and
High Performance model QCPU is switched from RUN to STOP before the
completion device turns ON, the completion device turns ON one scan later
when High Performance model QCPU is switched to RUN next time.
(b) The instruction dedicated for intelligent function modules can be executed to
the intelligent function modules of the main base unit and extension base
unit.
The instruction dedicated for intelligent function modules cannot be
executed to the intelligent function module installed to the remote I/O
station of MELSECNET/H.
REMARK
For the instruction dedicated for intelligent function modules and the completion
device, refer to the manual of the intelligent function module being used.
Содержание QCPU (Q Mode)
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