Kvaser Memorator Professional User’s Guide
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Frequently Asked Questions
Q: How many messages per second can Kvaser Memorator Professional
store on the disk?
A: It depends on the flash disk type. Fast disks can typically accommodate 20000
messages per second. For all practical purposes, this means full busload even at
1 Mbit/s.
Q: What disk brands are the fastest?
A: New models are introduced all the time, but during testing we have had
consistent good results from ATP (http://flash.atpinc.com) and TwinMOS Ultra-X
150x (http://www.twinmos.com). Your mileage may vary, of course.
Q: I have a very busy J1939 network. Will the Kvaser Memorator Professional
be able to handle that?
A: Most likely. J1939 operates at 250 kbit/s, which means up to 2000 8-byte
messages per second. As a contrast, the measured logging capacity of the Kvaser
Memorator Professional is 20000 messages per second, which is around 10 times
higher.
Q: How many hours will a 256 MB disk last?
A: It depends on the CAN bus load. To get a feeling for the numbers involved, see
section Disk capacity on page 24.
Q: Can I use 2 (4, 8, 16, . . . ) GB disks?
A: Yes. As of December 2008, the largest supported disk size is 32 GB. Be sure to
use the latest firmware.
Q: Can I use SDHC disks?
A: Yes.
Q: Can I use any SD/MMC disk?
A: Yes, in principal, but due to the high demands placed on the SD card used by an
industrial product such as the Kvaser Memorator Professional, we can only
support cards tested and sold by Kvaser, see Chapter 3.5.1, Supported disk types,
on Page 12.
Q: Can I use an external SD/MMC card reader to read the logged data?
A: Yes, the Kvaser Memorator Tools can read data from external disk readers, as
well as directly from a connected Kvaser Memorator Professional.
Q: I have logged a lot of data on my Kvaser Memorator Professional and now
I’m trying to open the list of files inside the Kvaser Memorator Tools, but it
seems to hang. What’s up?
Kvaser AB, Mölndal, Sweden — www.kvaser.com