Rockwell Automation Allen-Bradley DriveLogix 5730, User Manual

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Communicating with Devices on an ControlNet Link 7-17
1. You must be programming offline.
2. In the controller organizer, double-click the Controller Tags folder and
then click the Edit Tags tab.
3. Select the tag that you want to consume, or enter a new tag, and display
the Tag Properties dialog box.
4. Specify:
All consumed tags are automatically controller-scope.
To consume data from a remote controller, use RSNetWorx software to
schedule the connection over the ControlNet network.
The produced tag in the originating DriveLogix controller must have the
same data type as the consumed tag in the other DriveLogix controller. The
DriveLogix controller performs type checking to ensure proper data is being
received.
Important: If a consumed-tag connection fails, all of the other tags being
consumed from that remote controller stop receiving data.
Guidelines for Configuring
Connections The 1788-CNx communication daughtercard supports 9 scheduled
connections. How you configure these connections determines how many
devices the daughtercard can support.
The NUT and RPI also play a part in determining how many connections a
1788-CNx can support in a given application, assuming the RPIs will be the
same for all connections. You must also make sure that you do not exceed
the maximum number of bytes per NUT.
•
With the NUT = 5ms, the limit is 3 connections
•
With the NUT = 10ms, the limit is 7connections
•
With the NUT > 20ms, the limit is 9 connections
In this field: Type or select:
Tag Type Select Consumed.
Controller Select the name of the other controller. You must have already created the controller in the controller
organizer for the controller name to be available.
Remote Tag Name
Remote Instance Type a name for the tag in the other controller you want to consume.
Important: The name must match the name in the remote controller exactly, or the
connection faults.
If the remote controller is a ControlNet PLC-5, this field is Remote Instance. Select the instance
number (1-128) of the data on the remote controller.
RPI
(requested packet interval) Type the amount of time in msec between updates of the data from the remote controller. The local
controller will receive data at least this fast.
Display Style If you are creating a consumed tag that refers to a tag whose data type is BOOL, SINT, INT, DINT, or
REAL, you can select a display style. This display style defines how the tag value will be displayed in
the data monitor and ladder editor. The display style does not have to match the display style of the
tag in the remote controller.