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10.1.6
Set Up Transactions
Set up the communication between the node and the master.
In this example, the communication between the Temperature Regulator and the PLC.
The Temperature Regulator has two Modbus transactions:
•
One registers holding the setpoint temperature.
•
One registers holding the actual temperature.
Procedure
1.
Select the
Temp Regulator
node.
Configure the
temperature setpoint
transaction:
2.
To add a transaction, click
Add
.
3.
Select the transaction to configure.
4.
In the transaction sidebar, on the right side of the screen.
Enter values for the transaction settings.
Setpoint temperature transaction settings:
Setting
Value
Description
Transaction
name
Temp
Setpoint
Give the transaction a name.
Modbus
transaction
Write
Multiple
Registers (16)
The PLC writes a block of contiguous registers to the temperature regulator.
Address/
Register
Address: 0
Register: 1
Address 0 is Register 1.
Quantity
1
The transaction will address one data object.
Update
mode
Cyclically
The temperature regulator sends a new message cyclically, every 1000 ms.
Update time 1000 ms
The update cycle is 1000 ms.
Anybus
®
Communicator
™
User Manual
SCM-1202-152 1.10 en-US