Proportional plus integral control - PENN Controls - LIT-12011458 - C450Cxx - C450Rxx - C450Sxx - C450Yxx - System 450 Multi-Purpose Modular Control System - C450CBN Standard Control Module One Relay Output - C450CCN Standard Control Module Two Relay Outputs - C450CEN Communications Control Module for Ethernet - C450CPN Standard Control Module One Analog Output - C450CPW-400 Hybrid Control Module for EC Motor - C450CQN Standard Control Module Two Analog Outputs - C450CRN Communications Control Module for Modbus - C450RBN Reset Control Module One Relay Output - C450RCN Reset Control Module Two Relay Outputs - C450SBG Expansion Module One Low-Voltage Relay Output - C450SBN Expansion Module One Relay Output - C450SCG Expansion Module Two Low-Voltage Relay Outputs - C450SCN Expansion Module Two Relay Outputs - C450SPN Expansion Module One Analog Output - C450SQN Expansion Module Two Analog Outputs - C450YNN‐1 Power Module

System 450 Series Modular Controls Product Bulletin
Product
Controls > Multi-Purpose Modular Controls > C450CBN Standard Control Module One Relay Output
Controls > Multi-Purpose Modular Controls > C450CQN Standard Control Module Two Analog Outputs
Controls > Multi-Purpose Modular Controls > C450SPN Expansion Module One Analog Output
Controls > Multi-Purpose Modular Controls > C450CRN Communications Control Module for Modbus
Controls > Multi-Purpose Modular Controls > C450CPW-400 Hybrid Control Module for EC Motor
Controls > Multi-Purpose Modular Controls > C450CPN Standard Control Module One Analog Output
Controls > Multi-Purpose Modular Controls > C450SCN Expansion Module Two Relay Outputs
Controls > Multi-Purpose Modular Controls > C450SBG Expansion Module One Low-Voltage Relay Output
Controls > Multi-Purpose Modular Controls > C450SQN Expansion Module Two Analog Outputs
Controls > Multi-Purpose Modular Controls > C450SCG Expansion Module Two Low-Voltage Relay Outputs
Controls > Multi-Purpose Modular Controls > C450RBN Reset Control Module One Relay Output
Controls > Multi-Purpose Modular Controls > C450SBN Expansion Module One Relay Output
Controls > Multi-Purpose Modular Controls > C450CCN Standard Control Module Two Relay Outputs
Controls > Multi-Purpose Modular Controls > C450CEN Communications Control Module for Ethernet
Controls > Multi-Purpose Modular Controls > C450RCN Reset Control Module Two Relay Outputs
Document type
Product Bulletin
Document number
LIT-12011458
Revision date
2021-07-21

In addition to standard proportional only control analog signals, a System 450 control system provides integral control capability and six time integral selections that you can use to set up analog outputs to generate a proportional plus integral signal.

Proportional plus integral (PI) control incorporates a time-integral control action with proportional control action. If correctly set up, a PI control loop can effectively eliminate offset error and enable a controlled system to drive much closer to the preferred setpoint, even under large constant loads. On a properly sized system with predictable loads, PI control can maintain the controlled system very close to the setpoint.

The integration constant that you select establishes the rate at which the control readjusts the analog output signal. The faster the integration constant, the faster the control readjusts the output signal, and the faster the recovery rate of a properly sized and setup control loop. See Table 1 for information on the System 450 control modules with this feature.