Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual

Publication 1763-RM001C-EN-P - October 2009
296 Process Control Instruction
CV Lower Limit Alarm (LL)
The control variable lower limit alarm bit is set (1) when the calculated CV
output is less than the lower CV limit.
Setpoint Out Of Range (SP)
This bit is set (1) when the setpoint:
• exceeds the maximum scaled value, or
• is less than the minimum scaled value.
PV Out Of Range (PV)
The process variable out of range bit is set (1) when the unscaled process
variable
• exceeds 16,383, or
• is less than zero.
Done (DN)
The PID done bit is set (1) for one scan when the PID algorithm is
computed. It resets (0) whenever the instruction is scanned and the PID
algorithm was not computed (applies to timed mode only).
Tuning Parameter
Descriptions
Address Data Format Range Type User Program
Access
LL - CV Lower Limit Alarm PD10:0/LL binary (bit) 0 or 1 status read/write
Tuning Parameter
Descriptions
Address Data Format Range Type User Program
Access
SP - Setpoint Out of Range PD10:0/SP binary (bit) 0 or 1 status read/write
Tuning Parameter
Descriptions
Address Data Format Range Type User Program
Access
PV - PV Out of Range PD10:0/PV binary (bit) 0 or 1 status read/write
Tuning Parameter
Descriptions
Address Data Format Range Type User Program
Access
DN - Done PD10:0/DN binary (bit) 0 or 1 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