User manual

Ø Problemsinpracticalconnections
Insomecircumstancesuseradoptsastarco-
nfigurationinpracticalconnection.Thetermina-
tionresistorsmustbeconnectedtothetwoequi-
pment1#and5#inPicture10-4.4.Asthestarcon-
figurationisnotinconformitywiththerequire-
mentsofRS485standards,problemssuchassig-
nalreflections,loweranti-interferenceperform-
ancearisewhenthecablesarelongintheconne-
ction.Thereliabilityofcontrolsignalsisdecrea-
sedwiththephenomenathatthePTZdoesnot
respondtoorjustrespondsatintervalstotheco-
ntroller,ordoescontinuousoperationwithout
stop.
Trouble Possiblecause Solution
PTZcando
self-testing
butcannotbe
controlled
ThePTZcanbe
controlledbut
theoperationis
notsmooth.
ASecuretheconnection
BReplaceRs485BusWires
CAddterminationresistorstothesystem
DInstallRs485distributor
、；
、
、
、
Ø Rs485Bustroubleshooting
Rs485 Distributor
B-
1#
2#
3#
120Ω
120Ω
120Ω
A+
1#
32#
15#
6#
Maincontroller
Picture10-4.4
Picture10-4.5
120Ω
120Ω
ATheRs485Buslineisnotingood
contactwiththeconnectors.
BOnewireoftheRs485Busis
broken.
CThePTZisveryfarfrom
controller.
DTherearetoomanyPTZ
connectedinthesystem.
、
、
、
、
ATheaddressandbaudratesettingofPTZ
arenotinconformitywiththoseofcontroller.
BThe"+"and"-"connectionofRs485Busis
incorrect.
CThePTZisveryfarawayfromcontroller.
DTherearetoomanyPTZsconnectedinthe
System.
、
、
、
、
AChangetheaddressandbaudrateofcontrollerorPTZ
BReplaceRs485Buswires
CMakesuretheconnectionsarefullyseated
、
、
、
Insuchcircumstancesthefactoryrecommends
theusageofRS485distributor.Thedistributorcan
changethestarconfigurationconnectiontothemode
ofconnectionstipulatedintheRS485standards.
Thenewconnectionachievesreliabledatatransmi-
ssion.(RefertoPicture10-4.5).
41
Appendix