Purpose
The Digital Input (DI) block sends and receives digital data (1 or 0) from an I/O driver or OPC server every time the Scan, Alarm, and Control (SAC) program scans the block.
Features
The Digital Input block:
- Is a primary block.
- Can be used as a stand-alone block.
- Generates alarms when values are outside of defined limits.
- Sends and receives values from an I/O driver or OPC server when placed in Automatic mode.
- Receives values from an operator input in the iFIX WorkSpace, from scripts, from Program blocks, or from Easy Database Access programs when operating in Manual mode.
- Can be used in a chain with exception-based or time-based processing.
