Rockwell-automation 56AMXN/B ControlLogix AutoMax Comm Module Manuel d'utilisateur télécharger pdf (Page 39)

AutoMax DCSNet/RE RIO Module Page 39

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

Using the MSG Instruction to Access 56AMXN Data

You can use ControlLogix MSG instructions to access data in various

objects on the 56AMXN module.

For example, you can access any data on the DCS network using MSG

instructions to the custom DCS data object.

To use a MSG instruction, you create a tag of type MESSAGE to act as a

control for the MSG instruction and source and destination tags for the

MSG data. You must also enter the path to the 56AMXN module.

Figure 16 MSG Block Format

The tables in the following sections list the values you enter in the MSG

tags to perform the various operations.

DCS Data Object

The 56AMXN module implements a custom DCS Data Object that gives

you access to all the data on the DCS network. You can use MSG

instructions to access the data for any drop connected to the 56AMXN

module, not just the drops that have their data mapped into the scheduled

data of the ControlLogix processor.

The following tables show the attributes, instances and services

supported by the DCS Data Object on the 56AMXN. The combination

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 71 72

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Rockwell-automation 56AMXN/B ControlLogix AutoMax Comm Module Manuel d'utilisateur Page 39