Communication With Intelligent Function Module - Mitsubishi Q-Series User Manual

8 COMMUNICATION WITH INTELLIGENT FUNCTION MODULE

8 COMMUNICATION WITH INTELLIGENT FUNCTION MODULE
8.1 Communication Between Basic model QCPU and Q-series Intelligent Function Modules
Communication method with intelligent function modules
GX Configurator
Intelligent function module device
Instructions dedicated for intelligent function modules
4
8
4
FROM/TO instruction
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(1) Description of intelligent function modules
Basic model QCPU allows the use of the Q series-compatible intelligent function
modules.
The intelligent function module is a module that allows Basic 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
The intelligent function module is equipped with memory (buffer memory) to store
the data received from or output to external devices.
Basic model QCPU reads/writes the data from/to the buffer memory.
The following methods enable the communication between Basic model QCPU and
intelligent function modules:
• Initial setting or automatic refresh setting using the GX Configurator
• Intelligent function module device
• Instructions dedicated for intelligent function modules
• FROM/TO instruction
The following table shows the communication timing for the communication methods
with intelligent function modules described above:
Power ON
Initial setting
Automatic refresh setting
4
Communication timing .............. : Executed
Storage location ........................ : Can be stored
REMARK
1: Indicates whether the data (designated by the GX Configurator, of the device
initial value, etc.) is stored in Basic model QCPU or in an intelligent function
module.
2: Represents the internal memory of Basic model QCPU.
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.
Communication timing
Basic
model Instruction
STOP
QCPU RUN execution
reset
— — —
— — —
— — —
— — —
MELSEC-Q
Storage location
2
END
Basic
processing
model Intelligent
QCPU
— —
—
—
—
—
—: Not executed
—: Cannot be stored
8 - 1
1
3
—
—
—
—
—