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#temp Bits

Created by: Boosted6 at: 4/7/2021 2:56 AM (8 Replies)

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4/7/2021 2:56 AM	Rate (0)
Boosted6 Posts: 17 Rating: (0)	I am working on a handful of 840D Powerline machines, and they all have a bunch of #temp bits that I'm trying to ID as I need. I've attached a picture of the "Environment/Interface" from the top of the project. Can anyone help with what this is telling me address wise? Thank you, Rick Attachment #temp bits.PNG (155 Downloads)
Boosted6 Posts: 17 Rating: (0)
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4/7/2021 3:05 AM	Rate (0)
Boosted6 Posts: 17 Rating: (0)	I'm going to add 1 more attachment to this to show the context. Attachment Z4 Logic.PNG (155 Downloads)
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4/7/2021 5:30 AM	Rate (0)
PISCEAN 2010 Posts: 8092 Rating: (884)	Hello, Please refer below topics which shall help you to understand temp bits. Temporary bit and data used in FB - Entries - Forum - Industry ... & TEMP variable and STAT variable - Entries - Forum - Industry ...
PISCEAN 2010 Posts: 8092 Rating: (884)
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This contribution was helpful to 1 thankful Users Boosted6

4/8/2021 5:21 AM	Rate (0)
Boosted6 Posts: 17 Rating: (0)	Hi Piscean, I've already read through those, and they just confused me even more. These are used in the interlocking of an axis, and I'm just trying to figure out what they are supposed to be.
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4/8/2021 6:20 AM	Rate (0)
PISCEAN 2010 Posts: 8092 Rating: (884)	Can you attach your PLC project here? so that forum meembers can help you to undertsand temp bits used in logic
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4/8/2021 10:53 AM	Rate (0)
Pee El Sea Gold Member Joined: 1/19/2008 Last visit: 10/20/2025 Posts: 998 Rating: (65)	Hi, They are just bits that are used locally within the block they are declared. They are in your case flags L0.0 to L0.6 Their status is not valid outside of the block in which they are declare. Pee

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4/13/2021 3:45 PM	Rate (0)
Boosted6 Posts: 17 Rating: (0)	Okay I think I'm understanding a little bit better, but I'm a little confused with what I see in the attached FC. You'll see in NW16 that #Temp3 is read as "true", but then another #Temp3 written as false in the write coil position. Now I thought I understood that it had to be written first and then read, but if that's the case, then where does the #Temp3 "true" read come from? Regards, Rick Attachment #Temp3 Snip.PNG (133 Downloads)
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4/15/2021 2:37 PM	Rate (0)
Pee El Sea Gold Member Joined: 1/19/2008 Last visit: 10/20/2025 Posts: 998 Rating: (65)	Hi, NW15 and NW16 both write to #temp3. It's status is checked in NW16 after being written to in NW15. Pee

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This contribution was helpful to 1 thankful Users Boosted6

4/15/2021 2:57 PM	Rate (0)
Boosted6 Posts: 17 Rating: (0)	Perfect, thank you for the clarification. Pee El Sea Hi, NW15 and NW16 both write to #temp3. It's status is checked in NW16 after being written to in NW15. Pee
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