Multistate Digital Input Block

Purpose

The Multistate Digital Input (MDI) block provides a means of monitoring the state of one, two, or three related digital inputs. The block produces a raw input value (0 - 7) based on digital values it receives from an I/O driver or OPC server every time the Scan, Alarm, and Control (SAC) program scans the block.

Features

The Multistate Digital Input block:

• Is a primary block.
• Can be used as a stand-alone block.
• Provides more detailed information about a device than a Digital Input block.
• Generates alarms when values are outside of defined limits.
• Receives values from up to three driver I/O addresses or OPC servers.
• Receives values from Program blocks or from Easy Database Access programs.
• Can be used in a chain with exception-based or time-based processing.

See Also

Typical Uses

Example

Fields