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Counters In Logo Web Editor

Created by: JPC Consulting at: 7/21/2021 9:48 PM (13 Replies)

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7/21/2021 9:48 PM	Rate (0)
JPC Consulting Member Joined: 4/20/2021 Last visit: 7/22/2021 Posts: 9 Rating: (0)	Does anyone know if it is possible to show the current value of a counter in the LWE? I do not want the status / completion but I want the actual iteration / count number. Thanks

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7/21/2021 9:51 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 5/21/2022 Posts: 26837 Rating: (3245)	Yes, it's possible by using Parameter-VM-Mapping. It's a DInt value, a VD in mapping table.

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7/21/2021 9:59 PM	Rate (0)
JPC Consulting Member Joined: 4/20/2021 Last visit: 7/22/2021 Posts: 9 Rating: (0)	Would you have time to send me a small example Logo ladder and LWE project?

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7/21/2021 10:03 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 5/21/2022 Posts: 26837 Rating: (3245)	Yes, but not these evening. It's 22:00 o'clock and I want to go to bed. In this example I made also with a on delay timer for you.

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7/21/2021 10:04 PM	Rate (0)
JPC Consulting Member Joined: 4/20/2021 Last visit: 7/22/2021 Posts: 9 Rating: (0)	Good night! Thanks

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7/22/2021 5:51 AM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 5/21/2022 Posts: 26837 Rating: (3245)	In attachment the example. Attachment JPC Consulting.zip (49 Downloads)

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7/22/2021 11:54 AM	Rate (0)
JPC Consulting Member Joined: 4/20/2021 Last visit: 7/22/2021 Posts: 9 Rating: (0)	Thanks for the example, it runs very well. I want to know how did you know the mapping of the virtual words and double words? Counter 1 mapped VD10, VD14, VD18 & VD22 ---- How did you determine this? Document from Siemens? Same with Timers. T002 mapped to VW26, VW28 & VW30 T003 mapped to VW32, VW34 & VW36

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7/22/2021 12:16 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 5/21/2022 Posts: 26837 Rating: (3245)	The addressing in the VM area is byte oriented. Bit: Vx.y. x = byte number, y = bit number in the byte. V9.4 = Byte number 9, bit number 4. Byte: One byte consists of 8 consecutive bits. VB0 = V0.0 - V0.7. Word: One word consists of 2 consecutive bytes. VW0 = VB0 and VB1 = V0.0 - V1.7. DWord: One DWord consists of 2 consecutive words. VD0 = VW0 and VW2 = VB0 - VB3 = V0.0 - V3.7. The VM area has 851 Bytes, VB0 - VB850.

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7/22/2021 1:09 PM	Rate (0)
JPC Consulting Member Joined: 4/20/2021 Last visit: 7/22/2021 Posts: 9 Rating: (0)	Is the order of assignment "top down" "first in first out"? C0001 starts at VD10 because it was first read by plc in ladder code? If T002 was T001 (and C0001 was C0002) it would start with V10???? Thanks

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7/22/2021 1:14 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 5/21/2022 Posts: 26837 Rating: (3245)	No, the addresses are freely selectable. You just have to be careful not to duplicate or overlap. Example: You have the bit signals V0.0 - V0.3. Then you are not allowed to use the VB0, neither the VW0 nor the VD0. Attachment LOGO! Bit, Byte, Word and DWord.pdf (49 Downloads)

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