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Title: SAS WMS 550 black magic Post by: helg1978 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 = 0ä¶ 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 :( Can somebody help? :79- |