Production Planning for Process Industries (PP-PI)

An absolute value that the OPC server calculates for OPC Data Access subscriptions.

It specifies the absolute range within which the value of an OPC item must change at least to be reported to the SAP system.

Calculation formula:

Absolute deadband = (upper limit - lower limit) * percentage deadband

Example

A temperature sensor has a range from -100°C to +900°C within which the OPC value can still be shown exactly. A percentage deadband of 0.1% has been set up in the SAP system.

• Lower limit = -100
• Upper limit = +900
• Percentage deadband = 0.1

The absolute deadband is calculated as follows:

(900 - (-100)) * 0.1% = 1

This means that the temperature must change at least by ±1°C in order that the value is reported to the SAP system.