Rockwell Automation 193-EC1_2_3_5, 193-ECPM,592-EC1_2_3_5 E3 and E3 Plus Solid-State Overload Relay User Manual - Manual (Page 195)

Rockwell Automation Publication 193-UM002I-EN-P - December 2011 195
Logic Controller Communication Examples Chapter 10
For more information on configuring the scanlist of a DeviceNet Scanner, refer
to DeviceNet™ Node Commissioning on page 95.
Explicit Messaging The E3 Overload relay supports Explicit Messaging via DeviceNet. This allows a
controller to read and write various parameters from an E3 Overload Relay using
the unused bandwidth of the DeviceNet network. In these examples, a
CompactLogix L32E controller will read a parameter or group of parameters
from the E3 Overload Relay located on Node 6 on a DeviceNet network using
the following DeviceNet objects:
• Parameter Object (0x0F)
• Control Supervisor Object (0x29)
• Overload Object (0x2C)
• E3 Status Object (0x0375)
Reading Device Status using the Parameter Object Class (0x0F)
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 Device
Status of the E3 Plus Overload Relay using the Parameter Object Class. The
supporting ladder logic was added to execute a MSG instruction every time this
Periodic Task executes
.
The Device Status is located in Parameter 21 within the E3 Plus Overload Relay.
Setup the MSG instruction in the Configuration tab to read Parameter 21 using
the Parameter Object Class by configuring the following fields: