Endress+Hauser Liquiline CM44P - Page 105

Liquiline CM44P Operation
Endress+Hauser 105
y
t
A
B
C
0
1
A0041544
 90 Signal pattern of a time switch
t Timeline
y Signal level (1 = on, 0 = off)
A Period
B Signal duration
C Start time (Start date, Start time)
Menu/Setup/Additional functions/Time switches/ Time switch 1 ... 8
Function Options Info
Function Selection
• On
• Off
Factory setting
Off
Switches the function on or off
Start date 01.01.2000 to 31.12.2099
Format
DD.MM.YYYY
‣
Enter start date
Start time 00:00:00 to 23:59:59
Format
hh.mm.ss
‣
Enter start time
Signal duration 00:00:03 to 2400:00:00
Format
hh.mm.ss
Duration of the high signal level at the start of a
cycle
Period 00:00:03 to 2400:00:00
Format
hh.mm.ss
Duration of a cycle
Signal Display only Current process value of the time switch
Next signal date Display only Date of the next signal
Next signal time Display only Time of the next signal
Example 1: Time-based set point for a temperature controller
The temperature should increase to 21 °C from 08:00 every day, and then to 23 °C for 5
hours from 12:00. The temperature should be controlled to fall back down to 18 °C from
17.00. Two time switches are defined for this purpose which are used in a MF1: Formula
mathematical function. Using the mathematical function, an analog temperature set point
is thus available for a controller.