Parker PVSG, User Manual

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PVSG User Guide
15
The•USB•is•intended•for•PVSG•configuration•and•programming.•It•may•also•be•used•to•access•logs•
(depending•on•version)•and•as•a•Data•Link•Adapter•to•connected•modules.
The•following•table•provides•specifications•for•the•USB•port:
Item Min Nom Max Unit
Communication speed
Full speed
High speed
12
480
Mbps
Mbps
Capacitance of I/O to ground
Host
Device
134
2
µF
µF
VBUS output current limit 254 292 336 mA
VBUS output current rating 200 mA
ESD suppression, data pins 0.25 pF
ESD suppression, ID pin 68 nF
Reverse standoff voltage (see
note 1) 5 V
Note 1: ••USB•connectors•are•not•rated•to•survive•a•short•to•vehicle•battery.
Note:
•If•the•USB•from•the•PVSG•is•plugged•into•the•PC•and•doesn’t•work.••Try•unplugging•the•
USB•cable,•power•cycle•the•PVSG,•then•plug•the•USB•cable•back•in.••Repeat•until•the•USB•is•
successfully•connected.
6.4. SAE J1708
SAE•J1708•is•a•legacy•standard•used•for•serial•communications•between•ECUs•on•a•heavy•duty•vehicle•
and•also•between•a•computer•and•the•vehicle.•The•PVSG•can•has•1•of•this•type•communication•port.
The•J1708•port•is•provided•to•connect•J1939•networks•to•legacy•J1708•protocol•devices.
Note: On•power•up•the•PVSG•J1708•communication•port•is•briefly•held•dominant.•The•PVSG•
J1708•communication•port•is•also•briefly•held•dominant•while•PVSG•prepares•to•go•to•sleep,•
and•while•it•is•being•reprogrammed.•While•the•PVSG•J1708•communication•port•is•dominant,•
message•transmission•is•not•possible•on•the•J1708•communication•bus•connected•to•the•
PVSG.
6.5. Local Interconnect Network
The•LIN•(Local•Interconnect•Network)•protocol•is•a•compliment•to•the•CAN•protocol•and•may•be•used•for•
applications•that•are•not•time•critical•or•do•not•need•extreme•fault•tolerance.•
The•PVSG•may•have•up•to•4•LIN•ports•depending•on•configuration.
As•a•cost-effective•network•solution,•LIN•is•mainly•used•for•less•critical•functions,•and•implementing•low•
cost•automotive•sensors.•LIN•is•not•quite•as•robust•as•the•CAN•protocol.•
6.6. Ethernet
The•PVSG•has•up•to•1•Ethernet•port•depending•on•version.•The•port•meets•standard•IEEE•802.3,•
10/100BaseTx•and•has•a•transmission•rate•of•10/100•Mbits•per•second.