On Delay Timer Function - Metasys - LIT-1201793 - Software Application - Metasys Site Management Portal - 12.0.50

Metasys Site Management Portal Help
Product
Building Automation Systems > Building Automation Systems > Metasys Site Management Portal
Document number
LIT-1201793
Version
12.0.50
Revision date
2023-06-02

The following table and figures illustrate the function of the On Delay timer.

Table 1. On Delay Timer Function

Feature

Description

Activation

Goes inactive in a low to high Input transition, depending on the state of the input during the duration period. If the Input returns to a low state (inactive), the timing cycle is canceled and the Output remains inactive. If the Input remains in a high state, the Output goes to the high state at the next execution of logic.

In a high to low Input transition, the Output becomes inactive the next time the logic executes (logic executes every 5 seconds).

Output

See row above.

Reset

Cancels timer activity and makes the output inactive. If the Reset goes from active to inactive, the timer re-evaluates the Input at the next low to high transition.

Example

Delays the supply fan start 20 seconds after the return fan starts.
Figure 1. On Delay Timer Example 1

Figure 2. On Delay Timer Example 2