SEW MDR60A, Руководство по эксплуатации

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Operating Instructions – MOVIDRIVE® MDR60A/61B
15
Operating displays
Operation and Service (MDR60A1320-503-00)
15.2 Operating displays
The 5 LEDs in the cover of the regenerative power supply unit show the respective op-
erating state. Refer to chapter "LED signals" (page 123). The same LEDs are also lo-
cated on the internal control card for easier control during maintenance. There is, how-
ever, a separate orange LED on the board; its function is assigned to the two-color
(green/orange) LED in the cover.
If an error message is generated during the braking process, leading to the disconnec-
tion of the regenerative power supply unit, the regenerative power supply unit may not
be confirmed until the braking process is complete and the DC link voltage has dropped
to the standard value.
We recommend that you block the pulse enable of the drive controller via the centralized
alarm relay to prevent any possible problems.
15.2.1 U
CE
disconnection
The regenerative power supply unit switches off via the U
CE
protective device if the max-
imum current specified for the respective unit is exceeded. The operating principle of this
protective device does, however, cause an overload of the IGBTs for less than a milli-
second far in excess of its rating for standard operation. This does usually not represent
a problem for the unit. However, if this overcurrent disconnection occurs often or regu-
larly, the result will be an accelerated aging of the power semiconductors and ultimately
premature failure of the component.
Frequent U
CE
disconnections due to overcurrents can be triggered by:
• Overload
• Undervoltage in the supply system
• Defective or oscillating controller, such as in the drive controller
• An oscillating control value of the controller
• Incorrect dimensioning of the system
1877453195
off/collective error
phase failure
overcurrent/UcE
operation
overtemperature
reset
GN
RD
RD
YE
OG