Honeywell HC900 - DLAY Function Block

Function Blocks
DLAY Function Block
144 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
DLAY Function Block
Description
The DLAY label stands for On Delay/Off Delay Timer.
This block is part of the
Counters and Timers categories.
Function
Block is configurable as On Delay or Off Delay.
For On Delay, output turns ON when timer expires.
For Off Delay, output turns OFF when timer expires.
Input
TSPI
- Delay time set point in seconds.
INPUT - Edge detection starts the timer. ON delay timer is triggered by rising edge of input. OFF delay
timer is triggered by falling edge of input.
Output
TSPO -
Timer set point in seconds. Based on the TSPI pin at the point when the timer started. If TSPI
changes after the timer starts, TSPI is ignored and TSPO maintains the current timer set point.
TREM -
Remaining time in seconds; counts from TSPI down to 0.
TELPS - Elapsed time in seconds; counts from 0 to TSPI.