Mitsubishi Electric MELSEC-L LD75D, User Manual

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13.4
External I/O Signal Logic Switching Function
This function switches the signal logic according to the external equipment connected to the LD75.
For the system in which drive unit READY with b-contact, upper limit switch, and lower limit switch are not used, the
parameter logic setting can be controlled without wiring if it is changed to a "positive logic".
When the drive unit READY, upper limit switch, and lower limit switch are used, ensure to use them with b-contact.
The details shown below explain about the "external I/O signal logic switching function".
• Parameter setting details
• Precautions on parameter setting
(1) Parameter setting details
To use the "external I/O signal logic switching function", set the parameters shown in the following table.
Refer to  Page 118, Section 5.2 for the information on detail settings.
(2) Precautions on parameter setting
• The external I/O signal logic switching parameters are validated when the PLC READY signal [Y0] is turned
OFF to ON. (The logic is negative right after power-on.)
• If each signal logic is set erroneously, the operation may not be carried out correctly. Before setting, check
the specifications of the equipment to be used.
Setting item Setting details
Factory-set
initial value
Buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4
[Pr.22]
Input signal
logic selection
• Selection of logic of signals input from external source to LD75
0 31 181 331 481
b0 Lower limit
0: Negative logic
1: Positive logic
b1 Upper limit
b2 Drive unit READY
b3 Stop signal
b4 External command signal
b5 Zero signal
b6 Near-point dog signal
b7 Unused Set "0".
b8
Manual pulse generator
input 0: Negative logic
1: Positive logic
b9 to b15 Unused Set "0".
[Pr.23]
Output signal
logic selection
• Selection of logic of signals output from LD75 to external
source
0 32 182 332 482
b0 Command pulse signal
0: Negative logic
1: Positive logic
b1 to b3 Unused Set "0".
b4
Deviation counter clear
signal 0: Negative logic
1: Positive logic
b5 to b15 Unused Set "0".