Rockwell Automation 1756-HYD02 ControlLogix Hydraulic Servo Module - Manual (Page 78)

78 Publication 1756-UM525A-EN-P - June 2003
Chapter 5 Troubleshooting the 1756-HYD02 Module
Using the OK Indicator The module’s OK indicator is shown below.
The table below explains the OK indicator.
OK indicator
43454
OK Indicator Displays
If the OK
indicator
displays: The module status is: Take this action:
Off The module is not operating. • Apply chassis power.
• Verify the module is completely inserted into the
chassis and backplane.
Flashing green
light The module has passed internal diagnostics, but it is not
communicating axis data over the backplane. • Configure the module to begin communications.
• If you have configured the module, check the slot
number in the 1756-HYD02 Properties dialog box.
Steady green
light One of the following:
· Axis data is being exchanged with the module.
· The module is in the normal operating state.
None
Flashing red light One of the following:
• A major recoverable failure has occurred.
• A communication fault, timer fault, or NVS update is
in progress.
• The OK contact has opened.
If a Non-Volatile Storage (NVS) update is in progress,
complete the NVS update.
If an NVS update is not in progress, follow these steps:
1. Check the Servo Fault word for the source of the error.
2. Clear the servo fault condition using the Motion Axis
Fault Reset instruction.
3. Resume normal operation.
4. If the flashing persists, reconfigure the module.
Steady red light One of the following:
• A potential non- recoverable fault has occurred.
• The OK contact has opened.
Follow these steps:
1. Reboot the module.
2. If the solid red persists, replace the module.