Mitsubishi QCPU (Q Mode)

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MELSEC-Q
8 COMMUNICATION WITH INTELLIGENT FUNCTION MODULE/SPECIAL
FUNCTION MODULE
8 COMMUNICATION WITH INTELLIGENT FUNCTION MODULE/SPECIAL
FUNCTION MODULE
(1) Description of intelligent function modules/special function modules
High Performance model QCPU allows the use of the Q Series compatible
intelligent function modules and the AnS series compatible special function
modules.
The intelligent function module/special function module is a module that allows
High Performance model QCPU to process analog values or high speed pulses
which cannot be processed with I/O modules.
For example, an analog value is converted into a digital value with the
analog/digital conversion module, one of the intelligent function modules, before
being used.
(2) Communication with intelligent function modules/special function
modules
The intelligent function module/special function module is equipped with memory
(buffer memory) to store the data received from or output to external devices.
High Performance model QCPU reads/writes the data from/to the buffer memory.
8.1 Communication Between High Performance model QCPU and Intelligent Function
Modules
The following methods enable the communication between High Performance model
QCPU and intelligent function modules:
• Initial setting or automatic refresh setting using GX Configurator
• Device initial value
• FROM/TO instruction
• Intelligent function module device
• Instructions dedicated for intelligent function modules
The following table shows the communication timing for the communication methods
with intelligent function modules described above:
Communication timing Storage location
1
Communication method with intelligent function
modules
Power
ON
High
Performance
model QCPU
reset
STOP
RUN
Instruction
execution
END
processing
2
High
Performance
model QCPU
3
Intelligent
Initial setting
—— —
GX Configurator
Automatic refresh setting
————
—
Device initial value
—— —
FROM/TO instruction
4
——— — —
Intelligent function module device
4
——— — —
Instructions dedicated for intelligent function modules
4
——— — —
: Can be stored. —: Cannot be stored.
REMARK
1: Indicates whether the data (designated by the GX Configurator, of the device
initial value, etc.) is stored in High Performance model QCPU or in an intelligent
function module.
2: Represents the internal memory of High Performance model QCPU or a
memory card.
3: "Intelligent" represents an intelligent function module.
4: Represents the program using the intelligent function module device, the
FROM/TO instruction, or the instructions dedicated for intelligent function
modules.
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