Rockwell-automation 56AMXN/B ControlLogix AutoMax Comm Module Manual de usuario descargar pdf (Pagina 53)

AutoMax DCSNet/RE RIO Module Page 53

Publication number 56AMXN-UM002A-EN-P November 2002

Using DDE/OPC to Access DCS Data on the Module

You can use a DDE or OPC server such as RSLinx, or any other HMI

capable of accessing the ControlLogix backplane, to access the DCS data

directly on the 56AMXN. The module “emulates” PLC-5 integer files

100-155. Each file corresponds to a DCS drop. For example, if you

create tags to access N102, N102:0 to N102:63 represent Drop 2’s DCS

registers.

The 56AMXN supports Word Range Read/Write, Typed Read/Write,

Read/Modify/Write, and PLC-3 Bit Write messages, with either logical

ASCII or logical binary addressing.

To configure a topic in RSLinx to access data on the 56AMXN:

1. Create a new topic. From the main menu select DDE/OPC/Topic

Configuration. Click New and give the topic a name.

2. Select the Data Source tab, browse the path to the 56AMXN module

and click Apply.

3. On the Data Collection tab, set the Processor Type to PLC-5. Check

Polled Messages and select an appropriate update rate. Leave

everything else unchecked. Click Apply

4. You do not need to set anything on the Advanced Communication

tab.

5. Click Done to complete the topic configuration.

You should now be able to access data using any client capable of

communicating with RSLinx.

If you write to a register that is also mapped to ControlLogix scheduled

data, the value you write will be overwritten when the next scheduled

data update occurs.

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Rockwell-automation 56AMXN/B ControlLogix AutoMax Comm Module Manual de usuario Pagina 53