Mitsubishi Electric D75D4, User Manual

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Appendix - 116
MELSEC-Q
APPENDICES
Appendix 10.10 External I/O signal logic switching function
This function switches the signal logic according to the external equipment connected
to the QD75.
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".
[1] Parameter setting details
[2] 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.
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
QD75
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 QD75 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".
Refer to Section 5.2 "List of parameters" for the information on detail settings.
[2] Precautions on parameter setting
(1) 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.)
(2) 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.