Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

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8 COMMON FUNCTIONS
8.4 External I/O Signal Logic Switching Function
8.4
External I/O Signal Logic Switching Function
This function switches the signal logics according to the external device connected to the RD75.
For the system in which Drive unit READY signal handled as a normally closed contact, upper limit switch, and lower limit
switch are not used, controlling can be performed by this function without wiring if the parameter logic setting is changed to
Positive logic.
When Drive unit READY signal, upper limit switch, and lower limit switch are used, ensure to use them as normally closed
contacts.
Parameter setting details
To use the external I/O signal logic switching function, set the parameters shown in the following table.
Precautions on the parameter setting
• The parameters for the external I/O signal logic switching function become valid at the timing when PLC READY signal [Y0]
is turned off and on. (The logic is negative right after the power is turned on.)
• If the logic of each signal is set incorrectly, the operation may not be performed properly. Before setting logics, check the
specifications of the device used.
Setting item Setting detail Initial value at
the factory Buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4
[Pr.22] Input signal
logic
selection • Set the logic of each input signal according to the external device. 0 31 181 331 481
b0 Lower limit signal 0: Negative logic
1: Positive logic
b1 Upper limit signal
b2 Drive unit READY signal
b3 Stop signal
b4 External command signal
b5 Zero signal
b6 Near-point dog signal
b7 Use prohibited Set 0.
b8 Manual pulse generator input 0: Negative logic
1: Positive logic
b9 to
b15 Use prohibited Set 0.
[Pr.23] Output signal
logic
selection • Set the logic of each output signal according to the external
device.
0 32 182 332 482
b0 Command pulse signal 0: Negative logic
1: Positive logic
b1 to b3 Use prohibited Set 0.
b4 Deviation counter clear signal 0: Negative logic
1: Positive logic
b5 to
b15 Use prohibited Set 0.