I/O Blocks > Smart HART Discrete Input (SHDI) function block

Smart HART Discrete Input function block alarm detection

Configure the DISC_LIM parameter to select the state of the output (OUT_D) that causes the alarm condition parameter (DISC_ACT) to be True and to set Discrete Alarm sub-status in the output (OUT_D). You can enter any value between 0 and 255, although only 0 and 1 produce an alarm. However, you can enter state 255 to indicate that you never want an alarm indication.

This block supports conditional alarming. Enabling conditional alarming makes additional parameters available for this block. Enable and disable conditional alarming from the Block Alarms dialog (right-click the block and select Assign Alarm). The block provides the same features as standard Discrete Input conditional alarming.