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Siemens
HMI-LED
CB1P3946en
Building Technologies
HMI-LED Programming
2013-08-19
4.3.2 Humidity display
The engineering unit of humidity displayed on the HMI-LED screen is “%RH”.
For example, for controller “X2” which connects to humidity sensor, there is a
humidity variable as below.
The humidity variable is sent to the Input register 6, and the “VL_Unit” need to be
defined as “2”. If the humidity variable is with one factional digital, the
“VL_Factional” should also be defined as “0”.
4.3.3 Input register
To show the value with exact engineering unit and factional digital, the Input
register should be defined in SAPRO.
For example, if the Input register 1 is defined as Boole variable, then the “VL_In”
needs to be converted from Boole to REAL, and the “VL_Unit” should be
configured as “0” as well as the “VL_Factional”.
Later the value will be transferred to the Input register 1, and the configuration will
be written to the Input register 51 as predefined.
4.3.4 Input register quantity
For different applications, the different quantity values can be displayed on the
HMI-LED screen.
The Input register quantity should be defined as “50” in the Input register 135.
Max. 5 values can be displayed alternately on the default page, which can be
defined by users as below.
