General Communication Status - Communication Attempted Bit; Rio Baud Rate Status - Allen-Bradley 1747-SN User Manual

4–22 Scanner Configuration and Programming
General Communication Status Word, Word 0
Publication 1747 6.6 - July 1996

General Communication Status - Communication Attempted Bit

Word 0, bit 1 – is the Communications Attempted status bit. When
RIO communication has been attempted with all configured devices,
this bit is set to 1. There are no further transitions of this bit until a
processor change of state occurs (i.e., Program mode to Run mode or
Test mode, or Test mode to Run mode).
Until this bit is set, all devices in M1 file word 10 (active device
status) appear to be inactive. This bit can be used to condition the
Enabled Device Fault bit. If the Communications Attempted bit is 1,
the Enabled Device Fault bit is valid.
M1 (Status) File Word 0
Bit Number (decimal) 15 14
x x

RIO Baud Rate Status

Word 2, bits 0 to 1 – displays the RIO communication/baud rate
you have set the scanner to via its DIP switch. Writing to word 2
does not change the scanner baud rate.
M1 (Status) File - Word 2
Bit Number (decimal) 15 14
x x
RIO Baud Rate, Word 2
As illustrated by the table below, bit 0 = SW1 and bit 1 = SW2.
13 12 11 10 9 8
x x x x x x
13 12 11 10 9 8
x x x x x x
Bit 1 - 0 Baud Rate
11 57.6 KBaud
01 115.2 KBaud
10 230.4 KBaud
00 230.4 KBaud
7 6 5 4 3 2
x x x x x x
Communications Enable Device
Attempted Fault Bit
Status Bit
7 6 5 4 3 2
x x x x x x
Baud Rate
SW 1 - 2
11
10
01
00
1 0
M1 File
1 1
M1:e.0
1 0
M1 File
0 1
M1:e.2