Endress+Hauser Liquiline CM44 series - Device Variables; AI - Analog Input (PlcDevice)

SD01189C/07/EN/04.17
Endress+Hauser
17
4.5 Device variables
The device variables are used to transmit process values to and from the device.
Device
variable
Name
Info
Example
AI1 ... AI16
Analog Input
Process value that is read from the device
Read measured value
DI1 … DI8
Digital Input
Process value that is read from the device
Read limit switch state
AO1 … AO4
Analog Output
Process value that is written to the device
PID controlled variable
DO1 … DO8
Digital Output
Process value that is written to the device
Start cleaning signal
4.5.1 AI – Analog input (PLCDevice)
Each AI device variable consists of the following elements:
Register-Offset
Data type
Element
Description
0-1
Float
Value
Measurement value
2
Unsigned8
Status
Validity of value, see 0
3
Unsigned8
Unitcode
Unit of value, see section 7.3
The mapping between AI device variable and measurement value must be configured in the menu.
Path: Menu/Setup/Outputs/Modbus/AI 1 (Analog Input) … AI 16 (Analog Input)
Function
Options
Info
Source of
data
Options
 None
 Any data source
Factory setting
 None
The data sources presented for selection depend on
your device version. You can choose from all the
sensors connected to the inputs, controllers as well as
mathematic functions and current inputs.
For more information and an overview about the
available options see main operation manual.
Measured
value
Options
 None
 Depends on data source
Factory setting
 None
The measured value that you can choose depends on
the option selected under "Source of data".
For more information and an overview about the
available options see main operation manual.