Timers; Example - Siemens bt300 Operator's Manual

Chapter 4 - Parameters and Menu Structure
Parameters (M3)

Timers

Timers can be used to set a time channel as active during a certain time by commanding from a digital input (or a
time channel). For example, the settings below will set the timer as active when Digital Input 1 on slotA is closed
and kept active for 30 seconds after it opened.
Duration: 30s
Timer: DigIN SlotA.1
Timer 1 (M3.11.6)
Structure Parameter
P3.11.6.1 Duration
P3.11.6.2 AssignToChannel
Timer 2 (M3.11.7)
Structure Parameter
P3.11.7.1 Duration
P3.11.7.2 AssignToChannel
Timer 3 (M3.11.8)
Structure Parameter
P3.11.8.1 Duration
P3.11.8.2 AssignToChannel

Example

Problem:
We have a variable frequency drive for air conditioning in a warehouse. It needs to run between 7:00 A.M. until
5:00 P.M. on weekdays, and 9:00 A.M. until 1:00 P.M. on weekends. Additionally, the drive must be manually
forced to run outside working hours if there are people in the building, and must continue to run for 30 minutes
afterwards.
84 | 180
Siemens Industry, Inc.
Building Technologies
Table 52: Timer 1.
Unit Min Max
s 0 72000
Not Used Time Channel 3
Table 53: Timer 2.
Unit Min
s 0 72000
Not Used Time Channel 3
Table 54: Timer 3.
Unit Min
s 0 72000
Not Used Time Channel 3
Siemens BT300 HVAC Drive
Default ID
0 1489
Not Used 1490
Max Default
0 1491
Not Used 1492
Max Default
0 1491
Not Used 1494
Description
Defines the amount of time to added to
AssignToChannel (P3.11.6.2)
Defines the affected time channel (1-3)
for the timer.
0 = Not used
1 = Time Channel 1
2 = Time Channel 2
3 = Time Channel 3
ID Description
See description for P3.11.6.1
See description for P3.11.6.2
ID Description
See description for P3.11.6.1
See description for P3.11.6.2
DPD01809
2016-06-07