Allen-Bradley micrologix 1500 Reference Manual

Publication 1762-RM001C-EN-P
Process Control Instruction 19-7
Output Parameters
The table below shows the output parameter addresses, data formats, and
types of user program access. See the indicated pages for descriptions of
each parameter.
Control Variable (CV)
The CV (Control Variable) is user-defined. See the ladder rung below.
Control Variable Percent (CVP)
CVP (Control Variable Percent) displays the control variable as a
percentage. The range is 0 to 100%. If the PD10:0/AM bit is off (automatic
mode), this value tracks the control variable (CV) output. Any value
written by the programming software is overwritten. If the PD10:0/AM bit
is on (MANUAL mode), this value can be set by the programming
software, and the control variable output tracks the control variable
percent value.
Scaled Process Variable (SPV)
The SPV (Scaled Process Variable) is the analog input variable. If scaling is
enabled, the range is the minimum scaled value (MinS) to maximum
scaled value (MaxS).
If the SPV is configured to be read in engineering units, then this
parameter corresponds to the value of the process variable in engineering
units. See Analog I/O Scaling on page 19-17 for more information on
scaling.
Output Parameter Descriptions Address Data Format Range Type User Program
Access
For More
Information
CV - Control Variable User-defined word (INT) 0 to 16,383 control read/write 19-7
CVP - Control Variable Percent PD10:0.CVP word (INT) 0 to 100 control read/write 19-7
SPV - Scaled Process Variable PD10:0.SPV word (INT) 0 to 16383 status read only 19-7
Output Parameter
Descriptions
Address Data
Format
Range Type User Program
Access
CV - Control Variable User-defined word (INT) 0 to 16,383 control read/write
Output Parameter
Descriptions
Address Data
Format
Range Type User Program
Access
CVP - Control Variable Percent PD10:0.CVP word (INT) 0 to 100 control read/write
Input Parameter
Descriptions
Address Data
Format
Range Type User Program
Access
SPV - Scaled Process Variable PD10:0.SPV word (INT) 0 to 16383 status read only
0000
PID
PID
PID File PD10:0
Process Variable N7:0
Control Variable N7:1
Setup Screen
PID

Allen-Bradley micrologix 1500 Specifications

General

Brand	Allen-Bradley
Model	micrologix 1500
Category	Controller
Language	English