Select the Message Type
After entering the MSG instruction and specifying the MESSAGE structure, select the
Configuration
tab of the Message Configuration dialog to specify the details of the message.The
Configuration
tab also includes a check box for setting and clearing the .TO bit.The details you configure depend on the message type you select.
If the target device is a: | Select one of these message types: |
|---|---|
Logix 5000 controller | CIP data table read
CIP data table write |
I/O module that you configure using the Logix Designer application | Module Reconfigure
CIP Generic |
PLC-5® controller* | PLC-5 typed read
PLC-5 typed write
PLC-5 word range read
PLC-5 word range write |
SLC™ controller*
MicroLogix™ controller* | SLC typed read
SLC typed write |
Block transfer module* | block transfer read
block transfer write |
PLC-3® processor* | PLC-3 typed read
PLC-3 typed write
PLC-3 word range read
PLC-3 word range write |
PLC-2® processor* | PLC-2 unprotected read
PLC-2 unprotected write |
* When redundancy is enabled for ControlLogix 5580 or GuardLogix 5580 controllers, these message types are not supported.
Specify this configuration information:
In this field: | Specify: |
|---|---|
Source Element | If you select a read message type, the Source Element is the address of the data you want to read in the target device. Use the addressing syntax of the target device. If you select a write message type, the Source Tag is the first element of the tag that you want to send to the target device. I/O structure tags and Booleans are not supported. All other data types, for example INT, DINT, can be used. |
Number of Elements | The number of elements you read/write depends on the message type and on the type of data you are using. For "word range" and "unprotected" messages, the size of an element is indicated in the dialog box. For CIP and "typed" messages, an element is a single element of the array that you specify as the source of a write or destination of a read |
Destination Element | If you select a read message type, the Destination Tag is the first element of the tag in the Logix 5000 controller where you want to store the data you read from the target device.If you select a write message type, the Destination Element is the address of the location in the target device where you want to write the data. |
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