
Message Packet Formats
Chapter 5
5-13
Table
5.B Continued
Contents of Status DA
T
A for 1771-KA2, -KC/KD, -KE/KF; 1770-KF2; 1771-KG, 1774-KA; and
1785-KA Modules
Byte Bit Value Meaning
10
Cont’d
1771-KG MODULE
0 0
1
Half-Duplex Protocol
Full-Duplex Protocol
1 0
1
Physical Writes Enabled
Physical Writes Disabled
2 0
1
Unprotected Commands Enabled
Unprotected Commands Disabled
3 0
1
Embedded Responses Enabled
Embedded Responses Disabled
4 0
1
Even Parity
No Parity
5-7 0
1
2
3
4
5
6
7
19,200 bps
9,600 bps
4,800 bps
2,400 bps
1,200 bps
600 bps
300 bps
110 bps
1774-KA MODULE
0 0
1
Unprotected Commands Enabled
Unprotected Commands Disabled
1 -- Not Used
2 0
1
Physical Writes Enabled
Physical Writes Disabled
3 0
1
T
ransmission of Unprotected Commands Enabled
T
ransmission of Unprotected Commands Disabled
4 0
1
Data Highway Port B Is Connected
Data Highway Port A Is Connected
5 0
1
PLC Outputs Held in Last State
PLC Outputs Turned Off
6-7 0
1
2
3
57,600 bps
76,800 bps
38,400 bps
115,200 bps
1770-KF2 MODULE
0-1 0
1
2
3
57,600 Bits per Second
Undefined
Undefined
undefined
2 -- Not Used
3-7
Logical Complement of the State of Option Switch SW
-1, Switches 1 through 5
1785-KA MODULE
0 0
1
57,600 Bits per Second
Data Highway Baud Rate Switch
Undefined
1 0
1
57,600 Bits per Second
PCL Baud Rate Switch
Undefined
2-3 -- Not Used
4 -- Not Used
5 -- Not Used
6-7 -- Not Used
11
Address of the PCL Active Node T
able
12
(Low Byte First)
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