Introduction; Function Block Elements - Allen-Bradley Logix5000 Reference Manual

Introduction

Function Block Elements

Input Reference (IREF)
Function Block Attributes
This appendix describes issues that are unique with function block instructions.
Review the information in this appendix to make sure you understand how your
function block routines will operate.
IMPORTANT
To control a device, use these elements.
Function Block
Input Wire
Connector
(ICON)
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
When programming in function block, restrict the range of
+/-15
engineering units to +/-10
point calculations are done by using single precision
floating point. Engineering units outside of this range may
result in a loss of accuracy if results approach the
limitations of single precision floating point (+/-10
Output Reference (OREF)
B
Appendix
because internal floating
+/-38
).
Output Wire
Connector
(OCON)
655