Technical information

GigE camera and driver features

GigE Camera and Drivers Features V3.0.0

This document is a master document for all Allied Vision GigE camera models and is NOT camera specific

Ptp

Precision Time Protocol (PTP) manages clock synchronization of multiple

devices across an Ethernet network, with ±1 s tolerance. Once the clocks of the

devices are synchronized, a synchronous software trigger can be sent to Allied

Vision cameras via the PtpAcquisitionGateTime control. On Allied

Vision GigE cameras, the device clock is represented by the camera GevTime-

StampValue feature.

PtpAcquisitionGateTime [Integer] R/W

PtpAcquisition trigger time. Used to schedule a synchronized software

trigger on multiple PTP synchronized device. PtpAcquisitionGateTime

must be set beyond current camera GevTimeStampValue, i.e., GevTime-

StampValue  PtpAcquisitionGateTime. When set below Gev-

TimeStampValue, image acquisition stalls. PtpAcquisitionGate-

Time resets to zero when PtpMode set to Off.

PtpMode [Enum] R/W

Controls the PTP device behavior.

www



For more information on PTP, see the IEEE 1588-2008

standard:

http://standards.ieee.org/findstds/standard/1588-

2008.html

Range: [0 – (2

-1)] Default: 0 Unit: ns

Note



If using the camera event channel, a EventPtpSyncLost

is sent if PtpMode is changed. EventPtpSyncLocked is

sent once PTP synchronization is reestablished.

Off [Default] This device’s GevTimeStampValue is not

synchronized with any other device. PtpAcquisi-

tionGateTime resets to zero

Slave This device’s GevTimeStampValue is altered to align

with a master device‘s clock

Master This device’s GevTimeStampValue is the master

clock. All other PTP enabled slave devices synchronize

their clock to this camera

Auto This device uses the IEEE1588 best master clock algo-

rithm to determine which device is master, and which are

slaves. It may be assigned as either