Liquistation CSF22 MODBUS
®
-Guideline
Hauser
© Copyright Dez. 2011
17
5.4.1.
AO Analog values (Modbus
Device)
The parameters transferred via Modbus to the device can be used and configured accordingly to the given example
of configuring the Limit switch 1 to the Analog Ouput 1 value (AO 1) of the control system. This means the Limit
switch 1 monitors the AO 1 value from Modbus and switches accordingly the configured limit value.
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step Description
Example
Select a Component which uses a selectable
data source as input. In this example we use a
Limit switch
Press “Limit switches”
1
Press “Limit switch 1”
2
Select the Source of data
Press “Source of data”
3
Press “Modbus”
4
Select the value of this Source of data
Press “Measured value”
5
Press “Modbus AO 01
6
Verify the assignment
Check assignment of “Controlled variable”
5.4.2.
DO Digital values (Modbus
Device)
Digital values transferred via Modbus to the device can be used as trigger for an action in the device.
For example a sampling cycle can be triggered with a DO device variable. The configuration is similar to the use of
the AO (Analog Output variables).
5.4.3.
Overview of possible setpoint parameter
Path: The selection of the device variables is done in the menu of the relevant function.
Path
Used Modbus function block
Menu/Setup/Additional functions/Limit switch/data source
Modbus AO x
Menu/Setup/Additional functions/Cleaning/Cleaning X/Start signal
Modbus DO x
Menu/Setup/General Settings/Hold Settings/External Hold
Modbus DO x
Menu/Setup/Logbooks/Data logbooks/Data source
Modbus AO x / DO x
Menu/Display/User definable screens/Data source
Modbus AO x / DO x
