201-3 alarm A x-axis 4802E6

[tox]

Getting this alarm. OSP 5000-LG control LC40-1SC. LV leds lit on X axis servo, C axis servo and DC power supply. Power coming into the machine is 240V AC

DC power supply

R2 207V AC
S2 207V AC
T2 207V AC

X axis servo (BDU)

VH 150 V DC
VL 140
U 140
V 140
W 140

C axis servo (BDU)

same as above

Z axis servo (something else) (LV LED not lit)

150
140
130
130
130

thoughts?

thanks

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[underthetire]

I believe those should be 300VDC from the power supply to the drives. Bad power supply my guess.

[tox]

Thank you for your help.

[Algirdas]

I don't believe it could be 300V for power supply of OSP5000 equipped machine (OPUS 5000 most likely)
Generally there is nothing to believe. Just check documentation and that's it.
This alarm comes when minor power module is faulty. These are old fashioned Drive units and power modules go dead quickly. It's very normal to have spares stored (I prefer from eupec - it's cheaper and better than Fujitsu or Mitsubishi)

[underthetire]

huh? BLD servo amps have a 300 volt DC bus from the power supply to each drive. Multiple LV alarms on seperate drives, with a 140DC reading would shure lead me to believe its a power supply.

[littlerob]

Didn't we make you go away for a while Al? I am not happy.

"generally there is nothing to believe"????????????????? It's a machine, not a Yogi.

[Algirdas]

no problem. I just try to help Mr.tox
the problem is very common in my area.
Measurements on LV HV W U V terminals are improper at this case. The voltage U V W is applied to the motor, so measurement must be appropriate.

[tox]

Changed the power supply. So far it's good to go. thanks