Manual

1779KP5 Troubleshooting Tools
Chapter 6
65
Diagnostic status bytes contain information about the module, Data
Highway II, and Data Highway Plus.
To read the status bytes, you send a Diagnostic Status command from a
computer on your Data Highway II or Data Highway Plus network. For
information on how to read diagnostic status bytes, refer to the Data
Highway/Data Highway Plus Protocol and Command Set Reference
Manual (Publication 1770-6.5.16).
Diagnostic Status Bytes for Data Highway II
Data Highway II diagnostic status bytes can be read from an intelligent
device (computer) connected to your Data Highway II network. The
following table contains a list of the 1779-KP5’s diagnostic status bytes
for Data Highway II:
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
16 = Data Highway II Information
5 00 = Not Used
6 Data Highway Plus Link
Number
01 = Link 1
02 = Link 2
Etc.
7 Data Highway II Link Number 01 = Link 1
02 = Link 2
Etc.
8 00 = Not Used
9, 10 00 = Not Used
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
1779KP5 Diagnostic Status
Bytes