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Data type conversions.

Created by: JJbGUD at: 10/22/2014 10:16 AM (1 Replies)

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10/22/2014 10:16 AM	Rate (0)
JJbGUD Member Joined: 6/19/2014 Last visit: 4/25/2019 Posts: 8 Rating: (0)	Hello all... A little problem I've not seen before, I must be missing something obviouse.. S7-1215C PLC using modbus comms, I am reading in modbus registers and populating a DB with the read values. For each register the DB has an "INT" data type location. So, when converting to real I use a convert block, no wories, can normalise and scale, all is fine. Now, I am receiving a value I am told it is either negative or posative, so I convert to a SINT no problem, the resultant value is signed correctly, however when I the convert the SINT to real, the real isn't signed, a negative in results in 0.0... If someone could point me in the right direction I'd be most greatful. I bet it's something daft I'm doing or not doing... Thanks

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10/22/2014 11:51 AM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 11/9/2019 Posts: 8266 Rating: (1393)	Try sint to int then real.
	science guy
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