Abstracts |
K.U. Kasemir, L.R. Dalesio
The Allen-Bradley ControlLogix line of programmable logic controllers (PLCs)[1] offers several interfaces: Ethernet, ControlNet, DeviceNet, RS-232 and others. The ControlLogix Ethernet interface module 1756-ENET uses EtherNet/IP, the ControlNet protocol[2], encapsulated in Ethernet packages, with specific service codes[3].
A driver for the Experimental Physics and Industrial Control System (EPICS) has been developed that utilizes this EtherNet/IP protocol for controllers running the vxWorks RTOS as well as a Win32 and Unix/Linux test program. Features, performance and limitations of this interface are presented.
[1] Rockwell Automation, ^QControlLogix Selection Guide^R, Publication 1756-SG001A-US-P, July 2000
[2] ControlNet International, Ltd., ^QControlNet Specifications Release 2.0, Errata 2^R, 2000
[3] Rockwell Automation, ^QLogix5000 Data Access^R, Publication 1756-RM005A-EN-E, March 2000
{*} Work supported by US Department of Energy
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C011127
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ICALEPCS 2001
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