User Manual

Rockwell Automation Publication 193-UM002I-EN-P - December 2011 199
Logic Controller Communication Examples Chapter 10
Currently OUT A of the E3 Plus Overload Relay is energized as shown in Bit 2 in
Integer_Files[1].
Reading the Trip Class using the Overload Object Class (0x2C)
In this example a Periodic Task has been configured within the L32E to execute
every 1000 ms in which a message instruction will be used to read the Trip Class
of the E3 Plus Overload Relay using the Overload Object Class. The supporting
ladder logic was added to execute a MSG instruction every time this Periodic
Task executes.
Set up the MSG instruction in the Configuration tab to read the Trip Class by
using the Overload Object Class by configuring the following fields:
• Message Type: CIP Generic
• Service Type: Get Attribute Single
• Service Code: 0x0E (hex)
• Class: 0x2C (hex)
• Instance: 0x01 (hex)
• Attribute: 0x81 (hex)
• Destination: Integer_Files[2]