Parker Hannifin S.p.A S.B.C. Division SLVDN User’s Manual
Page 50 of 181
8.POWER SUPPLY MODE
8.1. “Low” voltage power supply
This procedure is for those situations in which the operator needs to work in close proximity
to the machine in a situation which could be potentially hazardous. In these conditions, the
operator must move the axes with a drive power supply voltage lower than the nominal rating
(from 40 to 180V~, and from 57 to 255 VDC (*)), so that the maximum allowable speed of
the axes is also lowered.
This mode is enabled by b40.10=1. The motor is actually enabled approx.120ms after closing
the contact that overrides the holding charge resistance. This contact is activated when the
internal continuous voltage in the drive gets over 40VDC, provided that there aren’t any
active alarms and that hardware and software enabling commands are available.
In the same way, an under voltage alarm is generated when the voltage level falls below
40VDC.
Caution:
the switch between low voltage and high voltage modes is potentially
dangerous to the drive. Always switch between modes with the drive disabled
and follow these instructions step by step.
o Low voltage to nominal operating voltage sequence.
a. Disable the drive. Wait 200ms.
b. Change the voltage from low to nominal.
c. Set bit b40.10 to 0
d. Wait 200ms.
e. Enable the drive. The drive will be enabled after about 120ms.
o Nominal operating voltage to low voltage sequence.
a. Disable the drive. Wait 200ms.
b. Set bit b40.10 to 1
c. Change the voltage from nominal to low.
d. Wait 200ms.
e. Enable the drive. The drive will be enabled after about 120ms.
(*) SLVD10N, SLVD15N and SLVD17N must be supplied by X7 and with continuous
voltage. The “bridge” (BR-IN) must be removed. The braking command is disabled.
For SLVDN 1,2,5,7, the braking low threshold is 400Vcc.
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