Allen Bradley OPC Server Configuration Guide

Ethernet	Ethernet Message Format
DF1	DF1 message format
KT	Not available
Full Duplex	Use Full Duplex protocol
Half Duplex	Not available
CRC	Use 16 bit CRC
BCC	Use 8 bit Check Sum
Master	IOServer will initiate all requests.
Slave	IOServer will wait for and response to requests.
Peer to Peer	IOServer will act as Master and Slave
Disable ACK Messages	Disable the transmission of ACK Messages
Station ID	Station Address of IOServer

Module	Use Pyramid Integrator (PLC-5/250) Module
Station Address	Address of Device
PLC Type	Select PLC-5, PLC-3, PLC-2, SLC 5/03, SLC 5/04 or SLC 5/05