X8 Instruction Set Reference Manual
1-24
I/O Configuration
I/O Forcing
I/O forcing is the ability to On/Off the specific bit at the user's discretion.
Input Forcing
When an input is forced to specified value, the value in the input data file will
be set to a user-defined state.
For digital inputs, you can force an input "on" or "off ".
When an input is forced, it no longer reflects the state of the physical input.
For embedded input port in the base module, the PLC reacts as if the force is
applied to the physical input terminal.
Output Forcing
When an output is forced, the PLC overrides the status of the control
program, and output port will be set the output to the user-defined state.
Digital I/O can be forced "on" or "off ".
The value in the output port is unaffected by the force.
It maintains the state determined by the logic in the control program.
However, the state of the physical output will be set to the forced state.
Input Filtering
Configurable Input
The
X8 Series PLC
allow users to configure embedded digital I/O of DC
inputs for high-speed or normal operation. Users can configure each input's
response time.
That is, it can be set the duration time that can recognize input signal form the
PLC through a configurable input filter function.
If it is set to long time, the most absolute element to recognize the signal by
the PLC is how long to keep the input signal must be "on". If it is used in
electrically noisy environments, data can be entered through this function.
If it is set to short time, similarly, high-speed or short pulse signal operation
can be set through the filtering function.
TIP
When an input is forced, it has no effect on the input device
connected to the controller.
TIP
If you force an output controlled by an executing PTO or PWM
function, an instruction error is generated.
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 ...