Rob,
read very carefully what John is saying.
The TIME kept by a CALC block is very stable.
What I read between the lines is: use the TIM statement to record/store the beginning
and or end of an event and use the difference as the lapse time.
Looks neater in the code too, but that's more of a personal opinion.
Cheers,
Frits.
BHP-NZSteel
-----Original Message-----
From: Johnson, Alex [mailto:[EMAIL PROTECTED]]
Sent: Friday, February 02, 2001 9:51 AM
To: Foxboro DCS Mail List
Subject: RE: Block Scan Time
I hit the button too quickly.
The time kept by the Station Block and by the CALC block are both stable.
The CALC will give you seconds since midnight. The Station Block provides
year, month, day, hour, and minute (but not second if I remember properly).
I suspect that your best bet is to use the CALC block.
Regards,
Alex Johnson
10707 Haddington
Houston, TX 77043
713.722.2859 (office)
713.722.2700 (switchboard)
713.932.0222 (fax)
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
-----Original Message-----
From: Burnham, Rob C. [SMTP:[EMAIL PROTECTED]]
Sent: Thursday, February 01, 2001 2:32 PM
To: 'Foxboro List'
Subject: Block Scan Time
Can a blocks scan time be used
to accurately count? I am trying to
to count elapsed seconds of overflow
on a tank, the scan time for the block
is 1 second and I increment a memory
register by one on each scan.
Is this accurate?
Rob Burnham
P. H. Glatfelter Co.
920 727-2426
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