Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 3)

Summary of Changes
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Summary of Changes
This edition of this publication contains new and updated information.
To help you find new and updated information in this manual, we have
included change bars as shown to the left of this paragraph.
New Information
For detailed information on this subject: See:
Three new function calls were added to the API library:
• DTL_READ_W_IDX
• DTL_RMW_W_IDX
• DTL_WRITE_W_IDX
Appendix B
Two new Ethernet R communication features were added. You can now:
• send/receive communication using AllenĆ Bradley's INTERCHANGEt
software and the INTERD daemon
• use the SNMPD daemon
Chapter 6
Updated Information
For detailed information on this subject: See:
All of the COMM ports on the coprocessor and expander are no longer
initialized at the factory for connection to a terminal. The 9Ćpin serial port
COMM 0, used for configuring the coprocessor, retains the factory settings
for connection to a programming terminal. In Series A Revision E (1.30)
and later of the firmware, however, COMM1, COMM2, and COMM3 have
all of their serialĆport settings prepared for raw binary data transfers.
Chapter 7
The control coprocessor and the expander now provide solid support for
RSĆ485 communications. The modules now have the necessary
hardware and lowĆlevel drivers on COMM1, COMM2, and COMM3.