Software Configuration
Original instructions
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Introduction
A Quantum DIO Drop consists of a standard module rack installed with I/O modules and a 140 CRA 21• •0 Modbus Plus communication module.
A DIO Bus can either be connected to the Modbus Plus connection on the CPU, or to a 140 NOM 2•• 00 communication module.
NOTE: The Quantum DIO Drop Modules 140 CRA 2•• ••• have no health bits.
For this reason the status for a properly functioning DIO Drop is always ZERO and not ONE as it is for other modules!
Adding a DIO Bus
The following table describes the procedure for adding a DIO Bus.
Step
Action
1
Select the Modbus Plus connection that you want to configure as a DIO Bus from the Project Browser or in the hardware configuration window.
The following configuration window is opened:
2
Activate the DIO Bus check box in the configuration window and confirm your entry.
A DIO Bus is placed in the Project Browser:
3
Open the DIO Bus and select add module rack and select New Device.
The module rack selection list is opened:
4
Select the desired module rack and enter the Modbus Plus address in the address field. Confirm with OK.
A DIO Drop is placed in the Project Browser. The number set, 12 in our example, states the Modbus Plus address of the Drop. The Modbus Plus Coupler 140 CRA 21X X0 is automatically entered in slot 1:
5
To continue configuring the RIO Drop you can carry on as with configuring a local I/O.
Modbus Plus Address
Ensure that the Modbus Plus Station Address that you have entered in the software configuration matches the hardware addresses of the modules used.