Summary - Allen-Bradley 1779-KFMR User Manual

Summary

This next example shows a large data frame being transmitted on one
circuit, while several data frames are being transmitted on the other
circuit. Then, while the 1,RR1 frame acknowledges one data frame, the
3,RR1 frame acknowledges seven data frames.
Circuit AB 1,D0,2
3,D2,0 3,D3,0 3,D4,0 3,D5,0 3,D6,0 3,D7,0 3,D0,0
Circuit BA
In this chapter, we gave you information about the HDLC data-link layer
of the communication protocol for the RS-422/449 link between the host
computer and the 1779-KFM interface. In the chapters that follow, we
give you information about the other layers of the communication
protocol according to the specific message-set selection that you choose.
Chapter 6
HDLC Data Link Layer
3,RR1
1,RR4
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