Communicating With Intelligent Function Module - Mitsubishi QJ71LP21 Reference Manual

3 SPECIFICATIONS
Methods for communicating with the intelligent module
By cyclic transmission (common parameters) +
(a) intelligent function module parameters
(Automatic refresh object device W).
Dedicated instructions for the intelligent function module
(b)
(REMFR,REMTO)
By cyclic transmission (common parameters) +
intelligent function module parameters
(c) (Automatic refresh object device D).
Remote I/O station parameters (parameters for
transmitting between devices)
Dedicated link instructions (READ,WRITE)
(d) Intelligent function module parameters
(Automatic refresh object device D)
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(2) Communicating with intelligent function module

The remote master station can communicate with the intelligent function module
mounted to the remote I/O station in the following four ways.
In communication methods (a), (c) and (d), when there is communicating
between remote master station and remote I/O station, the network parameters
are written to the remote master station and the PC parameters and intelligent
function module parameters are written to the remote I/O station.
The device range for communicating with each remote I/O station is set by the
remote master station common parameters.
PC parameters written to the remote I/O station will not cause problems with the
intelligent function module communication, even with the default settings.
Change the settings of the PLC parameters as needed.
POINT
(1) Note that the number of intelligent function module parameters (initial setting,
automatic refresh setting) that may be set is limited. If the number of
parameters set exceeds the limited number, the remote I/O module detects
the "SP. PARA ERROR (3301)" error. If the error has been detected,
read/write the data of the intelligent function modules using the
REMFR/REMTO instruction.
(a) The following is the number of parameters that may be set for initial
setting.
Sum total of the numbers of parameters within the setting ranges of all
intelligent function modules
(b) The following is the number of parameters that may be set for automatic
refresh setting.
Sum total of the numbers of parameters within the setting ranges of all
intelligent function modules
The number of parameters for initial setting is preset to each intelligent
function module. To confirm the numbers of parameters for initial setting, refer
to the user's manuals of the corresponding intelligent function modules.
Refer to Section 6.3 for the way to count the number of parameters for
automatic refresh setting.
(2) A remote master station cannot execute the dedicated instructions for
intelligent function module to the intelligent function modules mounted in a
remote I/O station.
Features
When the intelligent function module is mounted to a
nearby slot of the CPU module, the same kind of
sequence program can be created.
Regular time data can be read without regard to timing
The GX Configurator is not needed.
Data can be communicated only when needed.
When the intelligent function module is mounted to a
nearby slot of the CPU module, the same kind of
sequence program can be created.
In a way different from method 1, it is also possible to set
the intelligent parameters in the same was as setting for
the host.
When the intelligent function module is mounted to a
nearby slot of the CPU module, the same kind of
sequence program can be created.
Data can be communicated only when needed.
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MELSEC-Q
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