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Read single bits from word data type SCL

5/12/2025 7:53 AM	Rate (0)
LimakeinPL Joined: 2/8/2024 Last visit: 7/25/2025 Posts: 16 Rating: (0)	Dear all, I have a block where I configured "cfg" inputs (word) to set up type of valve. In TiaPortal V16 it works corrently. On the block I put 16#0001 and in block I prgorament #cfg.%X0 to check first bit (true/false). Now I have V18 Tia and the same block from V16. In online DB instance I see that cfg have 16#0001, but #cfg.%X0 is false. I check program and I have only this value without any reset. Even I check all posibilietes of 16#0000 coding in block and there is no changes. Do you have any idea why FB block with SCL dosen't read my single bits inside the program ? Thank you

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5/12/2025 8:25 AM	Rate (0)
qwazee Platinum Expert Joined: 3/30/2020 Last visit: 9/12/2025 Posts: 5446 Rating: (1064)	I suggest you make a clean, empty project. Place the code block inside the project and put down minimum amount of code. Test again. Post that minimal project here as a ZIP file if you repeat the problem.
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5/12/2025 10:52 AM	Rate (0)
LimakeinPL Joined: 2/8/2024 Last visit: 7/25/2025 Posts: 16 Rating: (0)	I will share my screnshoots in zip file. Im not able to test this in another project, it works even in simulation as I remeber. This line is working and I have to delete some warrnings. Thank you Attachment Screenshots.zip (100 Downloads)

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5/12/2025 11:19 AM	Rate (1)
Zivilin Bronze Member Joined: 5/29/2014 Last visit: 9/4/2025 Posts: 72 Rating: (33)	In your screenshots, the value of #Cfg is 16#0010, while the bit you are checking is Cfg.%X1. This value of #Cfg would correspond to the bit #Cfg.%X4 being TRUE, not Cfg.%X1, since 16#0010 is in hexadecimal notation, not binary. Cfg.%X1 being TRUE would correspond to #Cfg having a value od 16#0002
	Last edited by: Zivilin at: 05/12/2025 12:00:28
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5/12/2025 12:20 PM	Rate (0)
LimakeinPL Joined: 2/8/2024 Last visit: 7/25/2025 Posts: 16 Rating: (0)	Strange, Becuse I use the same type of variable (Dword) between HMI and PLC to control bits. I set bits in HMI and I read in PLC in the same way as I shown

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5/12/2025 1:43 PM	Rate (0)
LimakeinPL Joined: 2/8/2024 Last visit: 7/25/2025 Posts: 16 Rating: (0)	I see the problem... In another project I declarate 2#0001 on block inputs... There was a problem Thank you!

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