Hardware Reference Guide
SST-DN3-104-1 and SST-DN3-104-2
44
Troubleshooting
Document Edition: 1.0, Document #: 715-0082, Template Edition: 1.1, Template #: QMS-06-045
Use, duplication or disclosure of this document or any of the information contained herein is subject to the restrictions on page ii of this document.
4.1 HLTH or PWR LED is Red
This section describes strategies for troubleshooting, using a red HLTH or PWR LED.
Note
For information on LED flash codes, refer to Section A.3,
Fatal Hardware Self-Test Flash Codes
4.1.1 HLTH LED is Red
If the HLTH LED is red, the channel’s processor is not running or there has been a firmware
run-time error. Check the WdTout bit (refer to Table 7,
Control Register Bit Descriptions
determine whether or not there has been a watchdog timeout, and consult the appropriate
firmware manual if necessary. If you continue to experience difficulties, please refer to
Section 4.4,
Note
The firmware must be reloaded to restart the processor.
4.1.2 PWR LED is Red
If the PWR LED is red, there is no power applied to the V+ and V- DeviceNet Network Power
pins. Check the network power supply and network cable connectors.
Caution
Excessive voltage may damage the card permanently.