Rockwell Automation 1770, D17706.5.16 Ref Mnl DF1 Protocol Command - Manual (Page 30)

Chapter
2
Publication 1770Ć6.5.16 - October 1996
Understanding DF1 Protocol
If you are connecting an interface module to a computer, you must
program the computer to understand and issue the proper protocol
character sequences. This chapter describes the DF1 protocol you
can use with your DF1-link driver for:
•
peer-to-peer (two-way simultaneous) communication
•
master-slave (two-way alternate) communication
This chapter includes these sections:
Section Page
DF1 Protocol 2-2
Character Transmission 2-5
Transmission Symbols 2-6
Important: The 1784-KT and 1784-KT2 cards connect directly to
DH+; the 1784-KR card connects directly to DH-485.
As a result, an asynchronous RS-232 interface is not
used and the information in this chapter does not apply
to software written for these cards, which use the
Standard Driver software.