Справочник Пользователя для Mitsubishi Electronics QD75MH4
13 - 8
MELSEC-Q
13 COMMON FUNCTIONS
13.5 External I/O signal logic switching function
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.
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
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.
shown in the following table.
Buffer memory address
Setting item
Setting details
Factory-
set initial
value
Axis
1
Axis
2
Axis
3
Axis
4
• Selection of logic of signals input from external
device to QD75MH
b0 1
Lower limit
b1 1
Upper limit
0: Negative logic,
1: Positive logic
1: Positive logic
b2
Not used
Set "0".
b3
Stop
signal
b4
External
command/
switching signal
command/
switching signal
0: Negative logic,
1: Positive logic
1: Positive logic
b5
Not used
Set "0".
b6 1
Near-point dog
signal
signal
0: Negative logic,
1: Positive logic
1: Positive logic
b7
Not used
Set "0".
b8
Manual pulse
generator input
generator input
0: Negative logic,
1: Positive logic
1: Positive logic
Pr.22
Input signal logic
selection
selection
b9 to b15
Not used
Set "0".
0 31
181
331
481
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.
[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.)
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.
Before setting, check the specifications of the equipment to be used.