X8 Instruction Set Reference Manual
5-16
Using the High-Speed Counter and Programmable Limit Switch
HSC Mode 7 - Quadrature Counter (phased inputs A and B) With External
Reset and Hold
1) Count input A leads count input B.
(2) Count input B leads count input A.
Blank cells = don’t care,
↑
= rising edge,
↓
= falling edge
HSC Mode 8 - Quadrature X4 Counter
HSC Mode 7 - Quadrature Counter (phased inputs A and B) With External Reset and Hold Example
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 A
Count B
Z reset
Hold
Example 1(1)
↑
off
(0)
off
(0)
on
(1)
HSC Accumulator
+1 count
Example 2(2)
↓
↑
off
(0)
off
(0)
off
(0)
on
(1)
HSC Accumulator -1
count
Example 3
↓
off
(0)
off
(0)
on
(1)
Hold accumulator
value
Example 4
on
(1)
Hold accumulator
value
Example 5
on
(1)
Hold accumulator
value
Example 6
off
(0)
on
(1)
Hold accumulator
value
Example 7
off
(0)
off
(0)
HSC Mode 8 - Quadrature X4 Counter
X1.0.0.1(HSC0) (A)
X1.0.0/1(HSC0) (B)
Value of CE Bit
Accumulator and
Counter Action
▲
OFF
TRUE
Count Up Acc. Value
▲
ON
TRUE
Count Down Acc. Value
▼
OFF
TRUE
Count Down Acc. Value
▼
ON
TRUE
Count Up Acc. Value
OFF
▲
TRUE
Count Down Acc. Value
ON
▲
TRUE
Count Up Acc. Value
OFF
▼
TRUE
Count Up Acc. Value
ON
▼
TRUE
Count Down Acc. Value
OFF or ON
OFF or ON
X
Hold Acc.Value
X
X
FALSE
Hold Acc.Value
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 ...