Measuring (AI - subsystem-specific extension)

The Analog Input (AI) object supports following properties of the subsystem-specific extension Measuring.

Index, BACnet objects editor > Properties > Configuration

✳ Indicates a Siemens proprietary property.

Supported signal types ✳
"Supported signal types" defines which signal types are supported by the hardware.
Signal types of analog input
Description (en)	Name for import
0...10 V DC 4...20 mA 0...10 V Normaized 4...20 mA Normaized Temperature (LG-Ni1000 -50...180 °C) Temperature (Pt1000, NA) Temperature (Pt1000, EU) Temperature (PTC) Temperature (NTC 10k) Temperature (NTC 100k) 0...2500 Ohm	AI 0-10V AI 4-20mA AI 0-10 V DC (0-100 %) AI 4-20 mA (0-100 %) AI Ni1000 AI PT1K375 AI PT1K385 AI T1(PTC) AI NTC10K AI NTC100K AI 2500 Ohm
The signal type defined in the property "Signal type" has to be set to "True".

Signal type
'Signal type' defines the signal type for its I/O channel. The available signal types depend on the specific hardware, e.g. I/O module type or Onboard-I/O type.
Property ID: 4968

Process value 1 and Process value 2 ✳
"Signal value 1" (X1), "Signal value 2" (X2), "Process value 1" (Y1) and "Process value 2" (Y2) are used to calculate the linear function (f). The linear function is needed to calculate the present value out of the measured signal value. Unit: Depends on the process value. Range: -1 if the function needed to calculate the present value out of the measured signal value is completely defined by the selected signal type. Example: Ni1000 Any Value ≠-1 if the function needed to calculate the present value out of the measured signal value is not completely defined by the selected signal type.

Process value 1 and Process value 2 ✳

"Signal value 1" (X1), "Signal value 2" (X2), "Process value 1" (Y1) and "Process value 2" (Y2) are used to calculate the linear function (f). The linear function is needed to calculate the present value out of the measured signal value.

Unit: Depends on the process value.

Range:

-1 if the function needed to calculate the present value out of the measured signal value is completely defined by the selected signal type. Example: Ni1000

Any Value ≠-1 if the function needed to calculate the present value out of the measured signal value is not completely defined by the selected signal type.

Signal value 1 and Signal value 2 ✳
"Signal value 1" (X1), "Signal value 2" (X2), "Process value 1"(Y1) and "Process value 2" (Y2) are used to calculate the linear function (f). The linear function is needed to calculate the present value out of the measured signal value. Unit: Depends on the selected signal type. Range: -1 if the function needed to calculate the present value out of the measured signal value is completely defined by the selected signal type. Example: Ni1000 Any Value ≠-1 if the function needed to calculate the present value out of the measured signal value is not completely defined by the selected signal type.

Signal value 1 and Signal value 2 ✳

"Signal value 1" (X1), "Signal value 2" (X2), "Process value 1"(Y1) and "Process value 2" (Y2) are used to calculate the linear function (f). The linear function is needed to calculate the present value out of the measured signal value.

Unit: Depends on the selected signal type.

Range:

-1 if the function needed to calculate the present value out of the measured signal value is completely defined by the selected signal type. Example: Ni1000

Any Value ≠-1 if the function needed to calculate the present value out of the measured signal value is not completely defined by the selected signal type.

COV repetition time ✳
"COV repetition time" defines the repetition time in 1/10 sec to be used for process value reporting. The interval values for T1, T2, T3 can be configured in the Fieldbus-Management-Object.
T1	Highest priority. Typical interval value: < 10 s.
T2	Medium priority (default). Typical interval value: 10 s.
T3	Low priority. Typical interval value: > 10 s.

COV increment signal value ✳
"COV increment signal value" defines the COV limit to be used for signaling a change of the raw value by the TX-IO module.