X8 Instruction Set Reference Manual
5-26
Using the High-Speed Counter and Programmable Limit Switch
CountUp
The CountUp flag is used to the HSC mode from 0 to 9. When the
CountingEnabled Bit is set, the CountDown flag is set.
Overflow
The Overflow flag specifies the High Preset of the HSC. When the
accumulator value of HSC is greater than the value defined in the Overflow,
the Overflow interrupt is triggered. HSC is set the Underflow value as
accumulator to keep the count. The data range for the accumulator value is
-2,147,483,648 ~ 2,147,483,647 .
To set the Overflow value, toggles the Setparameter bit (from OFF to ON)
and the Overflow value stored in the SFR is transferred to the HSC.
The value stored in the Overflow must be greater than or equal to the High
Preset or an HSC error is generated.
Underflow
The Underflow flag specifies the Low Preset of the HSC. When the
accumulator value of HSC is less than the value defined in the Underflow, the
Underflow interrupt is triggered. HSC is set the Overflow value as
accumulator to keep the count. The data range for the accumulator value is
-2,147,483,648 ~ 2,147,483,647 .
Description
Data Format
HSC Mode
Function
User Program
Access
HSC:0.CountUp
Bit
0~9
Status
Read Only
Description
Data Format
HSC Mode
Function
User Program
Access
HSC:0.Overflow
Long Word (32 bit
INT)
Status
Read/Write
Description
Data Format
HSC Mode
Function
User Program
Access
HSC:0.Underflow
Long Word (32 bit
INT)
Status
Read/Write
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 ...