D-1
Appendix D
Data Highway Plus Interface Module
7-Segment LED Error Codes
The following error codes may be displayed on the 7-segment display.
.0 EPROM checksum failure
0 Gateway parameter error
.1 RAM checksum failure
1 Reply TNS error
.2 RAM AA failure
.3 RAM SS failure
3 Duplicate station detected
.4 RAM address line failure
4 Module not ready
.5 RAM address line clear failure
6 Invalid station address on thumbwheels
7 Module has not been enabled (register 5, bit 0)
.8 Data Highway Plus initialization failure
9 Module re-start in progress
.A Board Reset signal
.b Local watchdog failure
C Local port disconnected
.d AutoMax Processor watchdog failure
.E Power failure
.F Module failure
All errors except 3, 4, 6, 7, and C are fatal errors and indicate a malfunctioning
module.
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