Installation Instructions

TECHNICAL MANUAL GS 4x.00 KNX – ENGLISH
11
3. CO
2
Control
Designation
Options
Description
Type of CO
2
control
Inactive
CO
2
control disabled.
1-step
One threshold available – see description chapter 3.1.
2-step
3-step
PI
Two thresholds available – see description chapter 3.1.
Three thresholds available – see description chapter 3.1.
PI-Control – see description chapter 3.2.
Control value
output format
Switching command
Priority
Percent
Byte
Scene
A switching telegram is sent. There is one object available for every stage.
A priority telegram is sent. There is one object available for every stage.
A percentage value is sent. All steps are sending via one object.
A byte value is sent. All steps are sending via one object.
A scene value is sent. All steps are sending via one object.
Send control value
when change-over
Disabled
Enabled
No function.
When exceeding or falling below a threshold, a defined object is sent.
Send control value
when changing
(PI control only)
Disabled
If change above 1% … 25%
No function.
If there is a change, the recent control value is sent.
Send control value
cyclically
Disabled
Every two minutes up to 12 hours,
once a day
No function.
Cyclic sending of the recent control value.
Hysteresis
(symmetrical)
(single-stage, two-
stage, three-stage)
50 to 300 ppm
The hysteresis can prevent a frequent switching for fast and small changing values.
Allow to change base
set point via bus
No
Yes
Does not allow changes of base set point via bus.
Allows changes of base set point via bus.