Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual

585 Publication 1763-RM001C-EN-P - October 2009
Appendix H
MicroLogix 1100 Firmware Changes in OS
Series B FRN 4
OS FRN 1, 2, and 3 are Series A firmware, and OS FRN 4 is Series B
firmware. There are many changes in the OS Series B FRN 4 firmware. In
this chapter, only new features of OS Series B FRN 4 firmware are
summarized.
To use the newest features below, the firmware in your existing Series A
controllers must be upgraded to OS Series B FRN 4. In addition, RSLogix
500 programming software must be version 7.20.00 or higher.
The latest firmware is FRN 9. See the latest FRN release note
for details.
System Related
RTC information is still retained even when the firmware is upgraded.
Ethernet communication speed is improved compared to the earlier
firmware versions.
Serial Communications
Related
The following functionality is added to the OS Series B FRN 4 firmware.
DF1 Half Duplex Master driver / DF1 Half Duplex Slave driver
This driver supports direct communication through RS485 Network using
1763-NC01 cable without any additional devices. Use “No Handshaking
(485 Network)” in the protocol control tab of the Channel Configuration
File.
Modbus Master RTU driver / Modbus Slave RTU driver
This driver supports user selectable configurations of Stop Bits (1, 1.5, and
2) and Data Bits (8 and 7).
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Allen-Bradley MicroLogix 1100 Specifications

General

Brand	Allen-Bradley
Model	MicroLogix 1100
Category	Controller
Language	English