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analog scaling out of range + tolerance

Created by: ScubaMike at: 1/9/2009 1:49 PM (2 Replies)

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1/9/2009 1:49 PM	Rate (0)
ScubaMike Posts: 3 Rating: (0)	I have used a FC105 to scale a 4-20mA signal. The ENO output provides indication if the input is with range. I want to generate an error alarm if the mA drop below 3.5mA or above 20.5mA. Is the simplest way of doing this to use comparison instructions to check the input.I have nearly a hundred inputs to modify on a remote site with not very able electricians so I want to keep things as simple as possibe. Thanks Mike
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1/9/2009 3:24 PM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 12/2/2024 Posts: 10229 Rating: (1181)	Hello ScubaMike, I don't know if this is the simplest but look at Analog Value Representation for Analog Input Channels (page 199 and 200). Compare and ... regards
	Last edited by: UMENCHO at: 1/9/2009 3:27 PM
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1/9/2009 4:02 PM	Rate (0)
ScubaMike Posts: 3 Rating: (0)	Thanks For the help.. I guess the under/overshoot and under/overflow is detected by using the appropriate SFC? Thanks again Mike
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