Bit shifts

jd_hartzell@yahoo.co · Jun 28, 2019

Guys,
Good morning I'm drawing a blank here. I have a Studio5000 and i'm writing a program one of the Turck I/O blocks I am reading from is a IOLink device and the input has multiple functions in the word the 1st 2 bits are the outputs and the last 14 bits are the analog value of the device. I need to read the last 14 bits. In logic how do I do this?

Vlad Romanov · Jun 28, 2019

If I understand correctly, you should be able to use a BSL instruction to shift the data by 2 bits. This will leave you with the 14 bits at the least significant bit.

Dhitzfelder · Jun 28, 2019

Are the first 2 bits LSB or MSB?

If they are least significant, then Bit Shift Right. If most significant, I would copy to an INT (value), then use OTUs to set value.14 and value.15 to false

Picklemon · Jun 28, 2019

I used a BTD command for this type of situation last year.

the_msp · Jun 28, 2019

Picklemon said:
I used a BTD command for this type of situation last year.

+1

Source: NotShifted
Source bit: 2
Dest: shifted
Dest bit: 0

If the data looks non-sensical after this, maybe an Endian-ness issue, resolve with a SWPB mode Reverse.

And welcome to the forum!

chavak · Jun 28, 2019

Picklemon said:
I used a BTD command for this type of situation last year.

+1 too

Bit shifts

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