Okuma OSP 5000, Electrical Maintenance, Training Manual

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Okuma America Corporation
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Rev. 8-21-01
BLD
The BLD type drive system is basically a 2nd generation of the BDU drive. Like the BDU
drives, the BLD series has two types of drives, the BLD-A and BLD-D. The block diagram for
these drives are the same as the BDU types and can be seen in Figure 5-5 and 5-6. The BLD
type drives are physically smaller then the BDU type drives. It is possible to replace a BDU
drive with a BLD type drive. The BLD type drives only have single phase 220 VAC going to
their PCB’s. On the BLD-A, the BDC and SVC boards are combined and called the SVC-A
board.
Like the BDU drives, the same DCPS is used for both BLD-A and BLD-D drives. The PCB on
this power supply only has two LED’s on it. The following table shows what they mean.
The following is a description of the LED’s found on the BLD-A type axis drive amplifier.
Description of LED’s on BLD-A type drive amplifier.
LED Color Description
PSON Green Power is supplied to the DCPS.
OH Red Over Heat-The regeneration circuit is staying on too long.
LED Color Description
PSON Green Power is supplied to the servo amp via connector 10.
SAOP Yellow Sub Amp Operation-Turns off when machine ready signal is received.
MOL Red Motor Over Load
LV Red Low Voltage
VR Red The + or - 15VDC and/or the 5 VDC has dropped below specification.
IOCS Red Instantaneous Over Current in the Servo amplifier.
IOCM Red Instantaneous Over Current in the Motor.
F.OL Red Fin Over Load-Heatsinks are getting too hot.
HV Red High voltage was detected. The 300 VDC went above 430 VDC.
Amp Sat Yellow Amp Saturation-Drive amplifier received a heavy load.