14 - 10
Chapter 14 Common Functions
14.5 External I/O signal logic switching function
This function switches the signal logic according to the external equipment connected
to the QD77MS, "
Cd.44
External input signal operation device
" 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
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.
Buffer memory address
Setting item
Setting details
Factory-
set initial
value
QD77MS2
QD77MS4
QD77MS16
• Selection of logic of signals input from external
device to QD77MS
b0
Lower limit
b1
Upper limit
0: Negative logic,
1: Positive logic
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
Pr.22
Input signal logic
selection
b9 to b15 Not used
Set "0".
0 31+150n
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.
Summary of Contents for MELSEC-Q QD77MS
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Page 27: ...A 26 MEMO...
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Page 232: ...5 111 Chapter 5 Data Used for Positioning Control MEMO...
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Page 337: ...6 22 Chapter 6 Sequence Program Used for Positioning Control...
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Page 433: ...8 20 Chapter 8 OPR Control MEMO...
Page 458: ...9 25 Chapter 9 Major Positioning Control MEMO...
Page 593: ...10 30 Chapter 10 High Level Positioning Control MEMO...
Page 625: ...11 32 Chapter 11 Manual Control MEMO...
Page 659: ...12 34 Chapter 12 Expansion Control MEMO...
Page 767: ...13 108 Chapter 13 Control Sub Functions MEMO...
Page 813: ...14 46 Chapter 14 Common Functions MEMO...
Page 831: ...15 18 Chapter 15 Dedicated Instructions MEMO...
Page 846: ...16 15 Chapter 16 Troubleshooting MEMO...
Page 892: ...16 61 Chapter 16 Troubleshooting MEMO...
Page 971: ...Appendix 62 Appendices MEMO...
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