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2. DETAILS OF MIGRATION FROM Q17nCPUN(-T) TO RnMTCPU
(12) External signals interface module
The setting of the external signals interface module needs to be reviewed in
MELSOFT GX Works3 since the system setting is read from MELSOFT GX Works3.
When MELSOFT GX Works2 projects are diverted to MELSOFT GX Works3, the input
module is registered as a general-purpose intelligent module in the system parameters.
Refer to the following setting procedures to review the settings according to the replaced
input modules. (Refer to section 2.4.3(1) for details of project diversion.)
[Parameter setting methods]
RnMTCPU uses the common input module with PLC CPU. The following shows the
example in which the signal of RX41C4 input module is set in the external signal parameter
for each axis.
With MELSOFT GX Works3, the module to be used is set.
With MELSOFT MT Works2, the external signal parameter for each axis is set.
Setting item Setting details
1) MELSOFT GX Works3
[system parameter] settings
Set RX41C4 input module on the [System parameter] screen.
(Refer to “MELSEC iQ-R Module Configuration Manual” for details.)
2) MELSOFT MT Works2
[Axis setting parameter]
settings
Set the external signal parameters (FLS, RLS, STOP, DOG) of the target axes
as shown below on the [Axis setting parameter] screen.
[Signal type]→2: Bit device
[Device]→X0 (X device number of the input module set in 1))
[Point]
When the MELSEC-Q series external signals interface module is replaced with the
MELSEC iQ-R series input module, the detection accuracy depends on the operation cycle.
In order to detect signals at high accuracy, set the inter-module synchronization function to
“Synchronize”, and set the signal to “High-accuracy”.
Refer to “MELSEC iQ-R Motion Controller Programming Manual (Common)” for how to set the
inter-module synchronization function.
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