X8 Instruction Set Reference Manual
Using the High-Speed Counter and Programmable Limit Switch
5
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19
Underflow
The Underflow flag is set when the accumulated value decreases the lower
setpoint or Underflow value. If this flag is set, any PLC error does not
generated.
OutputMaskBits
The OutputMaskBits define which outputs on the PLC can be directly
controlled by the HSC. The HSC sub-system has the ability to directly
(without control program interaction) turn outputs ON or OFF based on the
HSC accumulator reaching the High or Low presets. The bit pattern stored in
the OMB variable defines which outputs are controlled by the HSC and which
outputs are not controlled by the HSC.
The bit pattern of the OMB variable directly corresponds to the output bits on
the controller. Bits that are set (1) are enabled and can be turned on or off by
the HSC sub-system. Bits that are clear (0) cannot be turned on or off by the
HSC sub-system. The mask bit pattern can be configured only during initial
setup.
This table illustrates this relationship:
Affect of HSC Output Mask on Base Unit Outputs
Description
Data Format
HSC Mode
Function
User Program
Access
HSC.0.Underflow
Bit
0~9
Status
Read/Write
Description
Data Format
HSC Mode
Function
User Program
Access
HSC.0.OutputMaskBits
Word (16 bit
binary)
Status
Read Only
OutputMaskBis Output Example
Output Example
16-Bit Signed Integer Data Word
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
HSC:0.HPO (high preset output)
0
0
1
1
0
0
0
1
1
0
0
1
HSC:0.OMB (output mask)
0
1
1
0
0
0
1
1
0
0
1
1
Y0.0.0
0
0
1
0
0
0
0
1
0
0
0
0
Содержание X8 Series
Страница 1: ...Catalog Number s X8 M14DDT X8 M16DDR X8 M32DDT X8 Instruction Manual Reference Manual ...
Страница 16: ......
Страница 64: ...X8 Instruction Set Reference Manual 2 12 X8 Series PLC Memory and Data Table ...
Страница 134: ...X8 Instruction Set Reference Manual 5 38 Using the High Speed Counter and Programmable Limit Switch ...
Страница 166: ...X8 Instruction Set Reference Manual 7 8 Relay Type Bit Instructions ...
Страница 180: ...X8 Instruction Set Reference Manual 8 14 Timer and Counter Instructions ...
Страница 205: ...X8 Instruction Set Reference Manual Math Instructions 10 17 ...
Страница 206: ...X8 Instruction Set Reference Manual 10 18 Math Instructions ...
Страница 212: ...X8 Instruction Set Reference Manual 11 6 Converion Instructions ...
Страница 218: ...X8 Instruction Set Reference Manual 12 6 Logical Instructions ...
Страница 236: ...X8 Instruction Set Reference Manual 15 8 Shift and FIFO LIFO Instructions ...
Страница 242: ...X8 Instruction Set Reference Manual 16 6 Sequencing Instructions ...
Страница 252: ...X8 Instruction Set Reference Manual 18 4 Input and Output Instructions ...
Страница 280: ...X8 Instruction Set Reference Manual 20 12 PID Control ...
Страница 296: ...X8 Instruction Set Reference Manual 21 16 ASCII Instructions ...
Страница 308: ...X8 Instruction Set Reference Manual 22 12 Communications Instructions ...
Страница 312: ...Appendix A 4 System Error Code ...
Страница 313: ...Appendix B MSG Instruction Error Code MSG Instruction Error Code ...
Страница 322: ...Appendix B 10 MSG Instruction Error Code ...
Страница 325: ...ASCII Character Set Appendix C 3 ...
Страница 326: ...Publication number X8 RM001A EN September 2012 ...
Страница 327: ...Copyright 2012 RS Automation Co Ltd All rights reserved ...