I have DS9490R and "1-wire bus short circuit" in logs. 

Cable don't connected. What is this mean? How to test device? 

logs: 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_select.c:(66) Selecting a
path (and device) path=/ SN=00 00 00 00 00 00 00 00 last path=00 00 00 00 00
00 00 00 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_select.c:(79) Continuing
root branch 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_ds9490.c:(495) DS9490
RESET. changed 0, flex: 1 
Apr 13 10:37:18 localhost OWFS[2461]:    DATA: ow_usb_msg.c:(174) Status
byte[0]: A 
Apr 13 10:37:18 localhost OWFS[2461]:    DATA: ow_usb_msg.c:(177) short
detected 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_ds9490.c:(543)
DS9490_Reset: SHORT 
Apr 13 10:37:18 localhost OWFS[2461]: CONNECT: ow_reset.c:(36) 1-wire bus
short circuit. 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_ds9490.c:(683) Got 16
bytes from USB search 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_ds9490.c:(711) gulp.
Adding element 0:00 00 00 00 00 00 00 00 
Apr 13 10:37:18 localhost OWFS[2461]:    DATA: ow_ds9490.c:(713) CRC error 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_ds9490.c:(607) Index 1 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_select.c:(66) Selecting a
path (and device) path=/ SN=00 00 00 00 00 00 00 00 last path=00 00 00 00 00
00 00 00 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_select.c:(79) Continuing
root branch 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_ds9490.c:(495) DS9490
RESET. changed 0, flex: 1 
Apr 13 10:37:18 localhost OWFS[2461]:    DATA: ow_usb_msg.c:(174) Status
byte[0]: A 
Apr 13 10:37:18 localhost OWFS[2461]:    DATA: ow_usb_msg.c:(177) short
detected 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_ds9490.c:(543)
DS9490_Reset: SHORT 
Apr 13 10:37:18 localhost OWFS[2461]: CONNECT: ow_reset.c:(36) 1-wire bus
short circuit. 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_ds9490.c:(683) Got 16
bytes from USB search 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_ds9490.c:(711) gulp.
Adding element 0:00 00 00 00 00 00 00 00 
Apr 13 10:37:18 localhost OWFS[2461]:    DATA: ow_ds9490.c:(713) CRC error 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_ds9490.c:(607) Index 2 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_select.c:(66) Selecting a
path (and device) path=/ SN=00 00 00 00 00 00 00 00 last path=00 00 00 00 00
00 00 00 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_select.c:(79) Continuing
root branch 
Apr 13 10:37:18 localhost OWFS[2461]:   DEBUG: ow_ds9490.c:(495) DS9490
RESET. changed 0, flex: 1 
Apr 13 10:37:18 localhost OWFS[2461]:    DATA: ow_usb_msg.c:(174) Status
byte[0]: A 
Apr 13 10:37:18 localhost OWFS[2461]:    DATA: ow_usb_msg.c:(177) short
detected 
Apr 13 10:37:18 localhost rsyslogd-2177: imuxsock begins to drop messages
from pid 2461 due to rate-limiting 
Apr 13 10:37:18 localhost OWFS[2507]:   DEBUG: ow_tcp_read.c:(114) read: 24
- 0 = 24 
Apr 13 10:37:18 localhost OWFS[2507]:   DEBUG: ow_cache.c:(468) Won't cache
empty directory 
Apr 13 10:37:18 localhost OWFS[2507]:   DEBUG: ow_cache.c:(1361) Delete from
cache sn 00 00 00 00 00 00 00 00 in=0xb6f7b2b4 index=0 
Apr 13 10:37:18 localhost OWFS[2507]:    CALL: ow_parsename.c:(99)
path=[/bus.0] 
Apr 13 10:37:18 localhost OWFS[2507]:   DEBUG: ow_parsename.c:(62) /bus.0 



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