Liquiline System CA80SI Operation
Endress+Hauser 87
11.5.3 PROFIBUS DP
Device variables (device → PROFIBUS)
Here you can specify which process values should be mapped to the PROFIBUS function
blocks and are thereby available for transmission via PROFIBUS communication.
You can define a maximum of 16 device variables (AI Blocks).
1. Define the data source.
You can choose from sensor inputs, current inputs and mathematical functions.
2. Choose the measured value to be transmitted.
3. Define how the device should behave in the hold state (for sensors). (Configuration
options of Source of data, Measured value and Hold behavior) → 81
Please note that if you select Hold behavior = Freeze , the system not only flags the status
but also actually "freezes" the measured value.
In addition, you can define 8 binary variables (DI Blocks):
1. Define the data source.
2. Select the limit switch or relay whose status is to be transmitted.
PROFIBUS variables (PROFIBUS → device)
A maximum of 4 analog (AO) and 8 digital (DO) PROFIBUS variables are available as
measured values in the controller, limit switch or current output menus.
Example: Using an AO or DO value as the set point for the controller
Menu/Setup/Additional functions/Controller 1
1. In the specified menu, define PROFIBUS as the data source.
2. Select the desired analog output (AO) or digital output (DO) as the measured value.
Further information on "PROFIBUS" can be found in the Guideline for Communication
via PROFIBUS, SD01188C
11.5.4 Modbus RS485 and Modbus TCP
Specify which process values should be output via Modbus RS485 Communication or via
Modbus TCP.
In the case of Modbus RS485, you can switch between the RTU and the ASCII protocol.
You can define a maximum of 16 device variables.
1. Define the data source.
You can choose from the analyzer as well as sensor inputs and controllers.
2. Select the measured value to be output.
3. Define how the device should behave in the hold state (for sensors). (Configuration
options of Source of data, Measured value and Hold behavior) → 81
Please note that if you select Hold behavior = Freeze , the system not only flags the status
but also actually "freezes" the measured value.
Further information on "Modbus" can be found in the Guideline for Communication via
Modbus, SD01189C
11.5.5 EtherNet/IP
Specify which process values should be output via EtherNet/IP communication.
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