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X8 Instruction Set Reference Manual
5-14
Using the High-Speed Counter and Programmable Limit Switch
HSC Mode 4 - Two Input Counter (up and down)
Blank cells = don’t care,
↑
= rising edge,
↓
= falling edge
Mode 5 - Two Input Counter (up and down) with External Reset and Hold
Blank cells = don’t care,
↑
= rising edge,
↓
= falling edge
Using the Encoder
The Encoder is used for determining direction of rotation and position for
rotating.
The figure below shows a encoder connected to inputs 0, 1, and 2. The count
direction is determined by the phase angle between A and B. If counter input
A leads counter input B, the counter increments. If the counter input B leads
the counter input A, the counter decrements.
HSC Mode 4 Examples
Input
Terminals
X1.0.0.0 (HSC0)
X1.0.0.0 (HSC0)
X1.0.0.0 (HSC0)
X1.0.0.0 (HSC0)
CE
Bit
Comments
Function
Count Up
Count Down
Not Used
Not Used
Example 1
↑
on
(1)
↓
off
(0)
on
(1)
HSC Accum1
count
Example 2
on
(1)
↓
off
(0)
on
(1)
HSC Accumulator -1
count
Example 3
off
(0)
Hold accumulator
value
Input
Terminals
I1:0.0/0 (HSC0)
I1:0.0/1 (HSC0)
I1:0.0/2(HSC0)
I1:0.0/3(HSC0)
CE
Bit
Comments
Function
Count
Direction
Reset
Hold
Example 1
↑
on
(1)
↓
off
(0)
on
(1)
↓
off
(0)
off
(0)
on
(1)
HSC Accum1
count
Example 2
on
(1)
↓
off
(0)
on
(1)
↓
off
(0)
off
(0)
on
(1)
HSC Accumulator -1
count
Example 3
on
(1)
↓
off
(0)
on
(1)
Hold accumulator
value
Example 4
on
(1)
↓
off
(0)
off
(0)
Hold accumulator
value
Example 5
on
(1)
↓
off
(0)
on
(1)
↓
off
(0)
Hold accumulator
value
Example 6
↑
Clear accumulator
(=0)
Summary of Contents for X8 Series
Page 1: ...Catalog Number s X8 M14DDT X8 M16DDR X8 M32DDT X8 Instruction Manual Reference Manual ...
Page 16: ......
Page 64: ...X8 Instruction Set Reference Manual 2 12 X8 Series PLC Memory and Data Table ...
Page 166: ...X8 Instruction Set Reference Manual 7 8 Relay Type Bit Instructions ...
Page 180: ...X8 Instruction Set Reference Manual 8 14 Timer and Counter Instructions ...
Page 205: ...X8 Instruction Set Reference Manual Math Instructions 10 17 ...
Page 206: ...X8 Instruction Set Reference Manual 10 18 Math Instructions ...
Page 212: ...X8 Instruction Set Reference Manual 11 6 Converion Instructions ...
Page 218: ...X8 Instruction Set Reference Manual 12 6 Logical Instructions ...
Page 236: ...X8 Instruction Set Reference Manual 15 8 Shift and FIFO LIFO Instructions ...
Page 242: ...X8 Instruction Set Reference Manual 16 6 Sequencing Instructions ...
Page 252: ...X8 Instruction Set Reference Manual 18 4 Input and Output Instructions ...
Page 280: ...X8 Instruction Set Reference Manual 20 12 PID Control ...
Page 296: ...X8 Instruction Set Reference Manual 21 16 ASCII Instructions ...
Page 308: ...X8 Instruction Set Reference Manual 22 12 Communications Instructions ...
Page 312: ...Appendix A 4 System Error Code ...
Page 313: ...Appendix B MSG Instruction Error Code MSG Instruction Error Code ...
Page 322: ...Appendix B 10 MSG Instruction Error Code ...
Page 325: ...ASCII Character Set Appendix C 3 ...
Page 326: ...Publication number X8 RM001A EN September 2012 ...
Page 327: ...Copyright 2012 RS Automation Co Ltd All rights reserved ...