Deadband, sometimes referred to as Offset, is used to create a band or offset at which a relay takes action. This is used to prevent short cycling of a relay.
The deadband value is the value above and below the setpoint at which points the output will act.
Below is an example of the deadband configuration used in a Value (Setpoint) feed.
This example shows a typical bleed feed driven by a Conductivity probe (input).
Setpoint = 2500uS/cm
Direction = Force LOWER
Deadband = 50
In this example when the Conductivity probe reports a value of 2550uS/cm (setpoint plus deadband) the relay will engage. When the Conductivity probe reports a value of 2450uS/cm (setpoint minus deadband) the relay will disengage.
Please note that the deadband value is applied both ABOVE and BELOW the setpoint. In the example above the deadband of 50uS/cm, creates an offset range of 100uS/cm.
Related Articles
Setting the Deadband
When configuring an output and a probe value is being used to drive the relay, the Feed Type may include a Deadband option. A Deadband is the offset created to prevent short cycling or toggling of a relay. This offset allows the value to climb above ...
Minimum Relay Run Time
When a relay is turned on or off the relay has a default STATE time of 5 seconds. This 5 second minimum STATE time is built into the operation system and may not be overridden by a user. Motorized valves often require a minimum amount of time to ...
Testing an output (relay)
When configuring an output, specifically a powered relay it is common for the operator to drive the relay to perform a visual inspection that the pump or device powered by the relay runs and is working as expected. Once an OUTPUT is configured, ZEUS ...
Manual run time for a relay
A user may override a relay's programming and drive the relay (output) for a define period of MINUTES. This is sometimes referred to as a "slug feed" or "hand mode". To drive a relay for a set period of time: 1. From the Summary Page click on the ...
Value Feed, Setpoint Feed
The Value Feed, sometimes referred to as a Setpoint Feed, drives the output by the value provided by a target input (i.e. a probe) to determine when an output (relay) turns on or off. Configuration options Enable - Slide the Toggle to GREEN, this ...