Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
43
Safety Inputs, Safety Outputs, and Safety Data
Chapter 2
Analog I/O Status Data
Individual input status indicates whether each analog input point is normal
(ON) or faulted (OFF). In addition, the following diagnostic data is monitored:
•
User 24V Supply Overrange or Underrange
•
Sensor Power Overcurrent or Undercurrent
•
Channel Signal Overrange or Underrange
•
Broken Wire Detected (4…20 mA current mode)
•
Single-channel Discrepancy Error (channel fault)
In SIL 2 or SIL 3 operation, a single-channel discrepancy error occurs
when both measurements (internal to the module) of the same input signal
are not within tolerance. If a single-channel discrepancy occurs, indicating
a problem with the module, input status is set to zero and a zero input
value is reported for that channel.
•
SIL 3 Dual-channel Discrepancy Error (channel fault)
•
Alarms
–
High High and Low Low Alarm Overrange or Underrange
–
High and Low Alarms Overrange or Underrange
–
Dual-channel Tachometer Dual Low Inputs Detected
–
Tachometer Frequency Overrange or Underrange
The alarm status is reported in the Alarm Status attribute for each channel.
Содержание Allen-Bradley 1734-IB8S
Страница 1: ...POINT Guard I O Safety Modules Catalog Numbers 1734 IB8S 1734 OB8S 1734 IE4S User Manual ...
Страница 4: ...4 Rockwell Automation Publication 1734 UM013J EN P July 2014 Summary of Changes Notes ...
Страница 10: ...10 Rockwell Automation Publication 1734 UM013J EN P July 2014 Table of Contents ...
Страница 14: ...14 Rockwell Automation Publication 1734 UM013J EN P July 2014 Preface Notes ...
Страница 22: ...22 Rockwell Automation Publication 1734 UM013J EN P July 2014 Chapter 1 POINT Guard I O Overview Notes ...
Страница 150: ...150 Rockwell Automation Publication 1734 UM013J EN P July 2014 Chapter 8 Replacing POINTGuard I O Modules Notes ...
Страница 180: ...180 Rockwell Automation Publication 1734 UM013J EN P July 2014 Appendix C Specifications Notes ...
Страница 186: ...186 Rockwell Automation Publication 1734 UM013J EN P July 2014 Appendix D Safety Data Notes ...
Страница 190: ...190 Rockwell Automation Publication 1734 UM013J EN P July 2014 Appendix E Configuration Parameters Notes ...
Страница 204: ...204 Rockwell Automation Publication 1734 UM013J EN P July 2014 Appendix G History of Changes Notes ...
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