X8 Instruction Set Reference Manual
1-28
I/O Configuration
Input Channel Filtering
The analog input channels use on-board signal conditioning to distinguish AC
power line noise from normal variations in the input signal. Frequency
components of the input signal at the filter frequency are rejected.
Frequency components below the filter bandwidth (-3 dB frequency) are
passed with under 3 dB of attenuation. This pass band allows the normal
variation of sensor inputs such as temperature, pressure and flow transducers
to be input data to the processor.
Noise signals coupled in at frequencies above the pass band are sharply
rejected. An area of particular concern is the 50/60 Hz region, where pick-up
from power lines can occur.
Converting Analog Data
The analog input circuits are able to monitor voltage signals and convert them
to digital data.
The followings show sample Analog Signal and Data Word values using the
nominal transfer function formula:
Analog to data word conversion (12 Bits)
Analog to data word conversion (16 Bits)
Converting Analog Input Data
Analog to data word conversion (12 Bits)
Analog Signal
Data Word
0V
0
5V
2048
10V
4095
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 ...