Rockwell Automation PLC-5 Fieldbus Solutions for Integrated Architecture User Manual - Manual (Page 212)

Publication 1757-UM006A-EN-P - May 2002
A-32 Standard Function Block Parameters
Pxxx Blocks Table A.86 PV
Table A.87 PV_D
Table A.88 PV_FTIME
Classification Record
Description Represents either the primary analog value for use in executing the function,
or a process value associated with it. It may also be calculated from the
READBACK value of an Analog Output block.
FF Data Type DS-65
Usage C/Process Variable
Length 5
Valid Views VIEW_1, VIEW_3
Storage Dynamic
Remarks Read Only
The data type consists of the value and status of floating point parameters
that are Inputs or Outputs. It uses the following two elements.
• Status
• Value
Classification Record
Description Represents either the primary discrete value for use in executing the function,
or a process value associated with it. It may also be calculated from the
READBACK_D value of a Discrete Output block.
FF Data Type DS-66
Usage C/Process Variable
Length 2
Valid Views VIEW_1, VIEW_3
Storage Dynamic
Remarks Read Only
The data type consists of the value and status of discrete value parameters. It
uses the following two elements.
• Status
• Value
Classification Simple Variable
Description Defines the time constant of a single expotential filter for the Process Variable
in seconds.
FF Data Type Float
Range Positive
Usage C/Contained