Pedestrian Pivot Barrier
MPP-112 / MPP-122 / MPP-132 / MPP-212 / MPP-222
Malfunctions
5817,0016EN / Version 00
77
12.5 Malfunction – motor controller MMC-120
Fig. 24: LEDs on MMC-120
1
Green LED for indication of the power supply state and the safety
input state
2
Red LED for error diagnosis
LED
Description
Possible cause /
Corrective action
To be carried
out by
Green LED is
OFF.
No power supply
Check power supply.
Electrical
specialist
Green LED is
flashing.
Power supply is present. Safety
input signal is missing.
Missing signal at emergency
input IN1 of the MBC-110.
CAN connection between
MBC-110 and MMC-120
defective.
Electrical
specialist
Green LED is
ON.
Normal operation
–
–
Red LED is
OFF.
No error code
–
–
Red LED is
ON.
External error with emergency
stop
Check for error in MBC-110 or
other MMC-120.
Electrical
specialist
Red LED is
flashing
Error
Number of blink impulses
indicates the error code.
See page 78, Table 15.
Electrical
specialist
Red and green
LED are ON
Application programme has been
erased.
Boot loader is waiting for down-
loading the application
programme.
Download software from the
MBC-110 to the MMC-120.
Electrical
specialist
Table 14: Description of the LEDs on the MMC-120