24
Rev. 1.0
8/26/2015
STM11 Hardware Manual
5 Troubleshooting
LED Error Codes
The STM11 uses bi-color LED to indicate status. When the motor is enabled, the green LED
flashes slowly. When the green LED is solid, the motor is disabled. Errors are indicated by
combinations of red and green flashes as follows:
Code
Error
Solid green
motor disabled
Flashing green
motor enabled
1 red, 1 green,
motor stall
1 red, 2 green
can’t move(disabled)
2 red, 1 green
CCW limit
2 red, 2 green
CW limit
3 red, 1 green
drive over temp
3 red, 2 green
internal voltage out of range
4 red, 1 green
supply voltage high
4 red, 2 green
supply voltage low
5 red, 1 green
over current
7 red, 1 green
communication error
LEDs
Green - Power
Red - Alarm
