Manual

1779KP5 Troubleshooting Tools
Chapter 6
66
Diagnostic Status Bytes for Data Highway Plus
Data Highway Plus diagnostic status bytes can be read from an intelligent
device (computer) connected to your Data Highway Plus network. The
following table contains a list of the 1779-KP5’s diagnostic status bytes
for Data Highway Plus:
Byte
Number
Description
1 00 = Not Used
2 Interface/Processor T ype EE = See Expansion Bytes (Bytes 3 and 4)
3 Interface Type Expansion Byte 1A = 1779KP5
4 Processor Type Expansion
Byte
17 = Data Highway Plus Information
5, 6 00 = Not Used
7, 8 Address of Active Node T able Byte 7 = Low Byte
Byte 8 = High Byte
9, 10 Diagnostic Counter Address Byte 9 = Low Byte
Byte 10 = High Byte
11 Series and Revision Bits 04
0 = Revision A
1 = Revision B
Etc.
Bits 57
0 = Series A
1 = Series B
Etc.
12 Option Switches Bits 03: SW 5 Data Highway Plus Baud Rate
02 = 230 Kb
04 = 1 15 Kb
06 = 57.6 Kb
Bits 47: SW
4 Route Updates
00 = Route Updates Disabled
03 = Route Updates Enabled