User manual

USER MANUAL 1.4 | EC1000
Berghof Automation GmbH | Harretstrasse 1 | 72800 Eningen | www.berghof.com
2VF100179FE04.docx | EC1000_HB_en_2D1652005ZD00.docx
21
USB memory sticks can be plugged in and removed during operation. The plugged-in device is auto-
matically identified and mounted in the /media/usbX directory. When the USB stick is unplugged, the
relevant /media/usbX directory automatically “vanishes” again, if it is no longer being accessed by a
program (see above).
Either the first partition or if there is no partition the entire memory is mounted on the memory
stick, i.e. it appears automatically in the appropriate directory.
The first stick is mounted under /media/usb0, the second under /media/usb1, etc. Maximally 8 sticks
can be plugged in and used at once (/media/usb [0-7]. If a new stick is plugged in (or one which has
previously been plugged in and then removed), it will be placed in the directory with the lowest free
number. By connecting a USB hub it is possible to operate multiple sticks on one USB interface. In this
case attention must be paid that there are no USB devices still attached to the hub itself when it is
plugged in and unplugged.
NOTICE
The mechanical structure of the USB port is designed for max. 1,000 mating
cycles.
USB plug assignment
USB
USB
B1
VCC
B2
D-
B3
D+
B4
GND
CAUTION
The maximum current available on the USB port is 0.5 A! Before you use
the USB device, check its power consumption.
The controller performs a reset if a USB device requires more than the max.
permissible current. A reset immediately stops the controller and the machine
and plant it controls. This may cause more extensive damage.
A USB device requiring more current cannot function and may be damaged by
this.