Kollmorgen - December 2011 269
MMC Smart Drive Hardware Manual - DRIVE RESIDENT DIGITAL MMC CONTROL
12.4.3.3 Drive Resident Digital MMC Control Start-Up Diagnostic LEDs
The LED D2 light on the Drive Resident Digital MMC Control lights up briefly while its
diagnostic tests are running and then goes off. If D2 remains on, the Drive Resident
Digital MMC Control has failed one of its tests. Follow these steps:
1. Turn off power to the system and to the application.
2. If the I/O wiring is connected, remove the connector.
3. Remove the defective Drive Resident Digital MMC Control from the drive.
4. Replace with a new Drive Resident Digital MMC Control. Connect the I/O wiring.
5. Turn on power to check diagnostics again.
NOTE
Diagnostics are run only when the system is powered up. It is possible that
a failure might occur during operation. If so, D2 remains off. If you suspect
that a module might be defective, cycle power to run diagnostics again.
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