Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual

Publication 1763-RM001C-EN-P - October 2009
Process Control Instruction 285
Setpoint MIN (MINS)
If the SPV is read in engineering units, then the MINS (Setpoint Minimum)
parameter corresponds to the value of the setpoint in engineering units
when the control input is at its minimum value.
Scaled errors greater than +32767 or less than -32768 cannot be
represented. If the scaled error is greater than +32767, it is represented as
+32767. If the scaled error is less than -32768, it is represented as -32768.
Old Setpoint Value (OSP)
The OSP (Old Setpoint Value) is substituted for the current setpoint, if the
current setpoint goes out of range of the setpoint scaling (limiting)
parameters.
Input Parameter
Descriptions
Address Data
Format
Range Type User
Program
Access
MINS - Setpoint
Minimum
PD10:0.MINS word
(INT)
-32,768 to +32,767 control read/write
TIP
MinS - MaxS scaling allows you to work in engineering
units. The deadband, error, and SPV are also displayed
in engineering units. The process variable, PV, must be
within the range of 0 to 16383. Use of MinS - MaxS does
not minimize PID PV resolution.
Input Parameter
Descriptions
Address Data
Format
Range Type User
Program
Access
OSP - Old
Setpoint Value
PD10:0.OSP word
(INT)
-32,768 to +32,767 status read only
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Allen-Bradley MicroLogix 1100 Specifications

General

Processor	32-bit
Programming Software	RSLogix 500
Mounting	DIN rail or panel mount
Power Supply	24V DC
Type	Compact PLC
Digital Inputs	12
Digital Outputs	8
Analog Inputs	4 (depending on model)
Analog Outputs	Optional with expansion module
Programming Language	Ladder Logic
Operating Temperature	0 to 55 °C (32 to 131 °F)
Series	MicroLogix