Introduction
The embedded Ethernet I/O scanner service in the M580 PAC scans network modules.
However, you can enable the controller scanner service as an EtherNet/IP adapter. When the adapter functionality is enabled, network scanners can access controller data that is mapped to adapter assembly objects in the controller program.
The controller scanner service continues to function as a scanner when it is enabled as an EtherNet/IP adapter.
To get data from the primary controller, make the connection to the Main IP address of the Controller.
The controller scanner service supports up to 16 instances of adapters (adapter 1 ... adapter 3). Each enabled adapter instance supports these connections:
one exclusive owner connection
one listen-only connection
Process Overview
These are the steps in the adapter configuration process:
Stage |
Description |
|---|---|
1 |
Enable and configure the controller scanner service as an adapter. |
2 |
Configure adapter instances in the scanner service. (Adapter instances correspond to each enabled adapter that is scanned.) |
3 |
Specify the size of adapter input and output assemblies in the scanner service. (Use sizes that match the input and output sizes of the enabled adapter.) |
Implicit and Explicit Messaging
In its role as an EtherNet/IP adapter, the controller scanner services responds to these requests from network scanners:
implicit messages: Implicit messaging requests are sent from a network scanner device to the controller. When the adapter functionality is enabled, network scanners can perform these tasks:
read messages from the controller scanner service
write messages to the controller scanner service
Implicit messaging is especially suited to the exchange of peer-to-peer data at a repetitive rate.
explicit messages: The controller scanner service responds to explicit messaging requests that are directed to CIP objects. When adapters are enabled by the controller, explicit messaging requests can access the controller scanner service CIP assembly instances. (This is a read-only function.)
Third-Party Devices
If the controller scanner service that communicates with the adapter can be configured using Control Expert, use DTMs that correspond to the controller to add those modules to your configuration.
Third-party EtherNet/IP scanners that access the adapter assembly instances through the controller’s scanner service do so with respect to the assembly mapping table. The controller scanner service is delivered with its corresponding EDS file. Third-party scanners can use the contents of the EDS file to map inputs and outputs to the appropriate assembly instances of the controller scanner service.