RE: Inconsistency of image rate in ADVimba

["Engbretson, Mark S. via Tech-talk" <tech-talk@aps.anl.gov>]

Was wondering if since at some points , since it was running at speed, network issues were then dropping down to slower ones. I.e., someone perhaps with multiple GigE cameras on the same network. These are cheap these days, and people are using them as web cams . . . but still setting the FPS to be fast.

 

 

From: Mark Rivers <rivers@cars.uchicago.edu>
Sent: Monday, October 5, 2020 4:19 PM
To: Engbretson, Mark S. <engbretson@anl.gov>; Jong Woo Kim <Jong.Woo.Kim@asu.edu>
Cc: tech-talk@aps.anl.gov
Subject: RE: Inconsistency of image rate in ADVimba

 

>  Is this camera on a shared network cable or on a dedicated private network? Is the ethernet MTU setting (jumbo packets) as large as the ethernet adapter supports?

 

Note that in my previous post the Manta camera was connected to the public network, and was not using jumbo packets, the packet size was 1500.  It was still able to run at the maximum specified frame rate of 21 frames/s.  That is 2464*2056*21 bytes/s = 106,385,664 bytes/s , which is very close to the maximum bandwidth of 1 Gbit Ethernet, which is what this camera uses.  The camera was connected to the same switch as the computer.

 

Mark

 

 

 

From: Tech-talk <tech-talk-bounces@aps.anl.gov> On Behalf Of Engbretson, Mark S. via Tech-talk
Sent: Monday, October 5, 2020 3:41 PM
To: Jong Woo Kim <Jong.Woo.Kim@asu.edu>
Cc: tech-talk@aps.anl.gov (tech-talk@aps.anl.gov) <tech-talk@aps.anl.gov>
Subject: RE: Inconsistency of image rate in ADVimba

 

Area any errors being thrown in the iocConsole?  Is this camera on a shared network cable or on a dedicated private network? Is the ethernet MTU setting (jumbo packets) as large as the ethernet adapter supports?

 

 

From: Tech-talk <tech-talk-bounces@aps.anl.gov> On Behalf Of Jong Woo Kim via Tech-talk
Sent: Monday, October 5, 2020 3:32 PM
To: tech-talk@aps.anl.gov
Subject: Inconsistency of image rate in ADVimba

 

Hi, 

 

I found that the Image rate (PV:13VMB1:cam1:ArrayRate_RBV) varies randomly. 

When I set the Frame rate to be 10 and ROI to be 2464x2056 (full image size), The image rate is sometimes 22 or 2 or 8. There is also no tendency with ROI. The camera is Mako. Do you have any idea about this issue? 

 

Best,

Jong Woo