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Chapter 14 Common Functions
14.5 External I/O signal logic switching function
This function switches the signal logic according to the following signals.
• External equipment connected to Simple Motion module
• [Cd.44] External input signal operation device
• External input signal of servo amplifier (upper/lower limit switch, near-point dog)
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
negative logic (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
QD77MS2
QD77MS4
QD77MS16
[Pr.22]
Input signal logic
selection
• Selection of logic of signals input from external
device to Simple Motion module
0 31+150n
b0 Lower limit
0: Negative logic,
1: Positive logic
b1 Upper limit
b2 Not used Set "0".
b3 Stop signal
0: Negative logic,
1: Positive logic
b4
External
command/
switching signal
0: Negative logic,
1: Positive logic
b5 Not used Set "0".
b6
Near-point dog
signal
0: Negative logic,
1: Positive logic
b7 Not used Set "0".
b8
Manual pulse
generator input
1
0: Negative logic,
1: Positive logic
b9 to b15 Not used Set "0".
n: Axis No.-1
1: Only the value specified against the axis 1 is valid for the logic selection of manual pulse generator input (b8).
: Refer to Section 5.2 "List of parameters" for the information on detail settings.