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Old September 14th, 2004, 01:39 AM   #1
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russrmartin is offline
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Logix 5000 First Scan Bit

I know that to get the first scan bit out of a CL5000 processor, you need to use a GSV. But that is as far as I get. I cannot find the actual first scan object. Can anyone tell me where to get this, or post a screen shot of a GSV in which they got this bit? Thanks.

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Old September 14th, 2004, 01:59 AM   #2
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Gerry is offline
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Use a XIO or XIC instruction with address S:FS

No GSV required.
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Old September 14th, 2004, 03:53 AM   #3

jvdcande is offline
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Gerry is right. Browse the on-line help for "Monitoring Status Flags". You'll find several S: flags, such as S:C for carry, S:N for negative result and S:MINOR for detection of minor faults, besides S:FS for first scan.

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Old September 14th, 2004, 09:48 AM   #4
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akreel is offline
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Thanks guys! I was wondering about that, too!
Especially since the "power-up" routine is exactly that. Don't expect the power-up tasks to get executed unless you unplug the controller. Switching from Program to Run doesn't do it.

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