External I/O Signal Logic Switching Function - Mitsubishi Electric QD75MH1 User Manual

13 COMMON FUNCTIONS

13.5 External I/O signal logic switching function

Setting item
Input signal logic
Pr.22
selection
1: The input signal logic selection (positive/negative logic) is valid to the forced stop of the servo amplifier when
" Pr.80 External input signal selection" is set to "1".
2: Refer to Section 5.2 "List of parameters" for the information on detail settings.
This function switches the signal logic according to the external equipment connected
to the QD75MH or the external input signal (upper/lower limit switch, near-point dog) of
the servo amplifier.
For the system in which 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 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.
• Selection of logic of signals input from external
device to QD75MH
1
b0
1
b1
b2
b3
b4
b5
1
b6
b7
b8
b9 to b15
[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.
Setting details
Lower limit
0: Negative logic,
1: Positive logic
Upper limit
Not used Set "0".
Stop signal
0: Negative logic,
External
1: Positive logic
command/
switching signal
Not used Set "0".
0: Negative logic,
Near-point dog
signal
1: Positive logic
Not used Set "0".
0: Negative logic,
Manual pulse
generator input
1: Positive logic
Not used Set "0".
13 - 8
MELSEC-Q
Buffer memory address
Factory-
set initial
Axis Axis Axis
value
1 2 3
0 31 181 331
Axis
4
481