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Author Topic: SAS WMS 550 black magic  (Read 1810 times)
helg1978
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« on: March 18, 2012, 10:06:12 PM »

Hi!
I am trying to connect to WMS 550 by SAS, and I have something weird:
In no action state, machine send SAS adress and sometime 00 or FF bytes - can't unterstand why.
Some polls work fine - i can read meters for example.
But some polls  works incorrectly - for example poll  $54 = Send the SAS ID and machine serial number.
Answer is:
$54 = Message Length = 04
$54 = SAS version ID = 402
$54 = Serial Number  = 0À¢

TX>= 07 54
RX<= 07 54 04 34 30 32 30 E4 B6

Real serial number much longer, so seems like error, but E4 B6 is the right checksum!!

Then, some polls have no response or zero response

I haven't SAS 4.02 manual (have sas 6.02) but sure can not be so big differenses in protocol!
So i am confused.  I've changed board - but same sh*t Sad
Can somebody help?  stir the pot / get cooking
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