S5 Data Block Use For Logic?

HI,

DUE TO THE LIMITED OF FLAG 0.0 - 255.7, FOR CPU 115 - 943B

CAN I USE THE BIT OF DATA BLOCK TO THE LADDER LOGIC?

EXAMPLE

AT PB 6

CALL DB10

A D0.0
A D0.1
O D0.2
= D0.7

REGARDS

TEH

NOTE : I KNOW THAT IS POSSIBLE FOR CPU 135U... THANKS!

teh said:

I KNOW THAT IS POSSIBLE FOR CPU 135U... THANKS!

Click to expand...

Teh

The easiest way to answer this question is try it out, set up a DB and a bit of logic, load it into your PLC and see if it works. I have used DB bits in a 115U 945 cpu, so I can see no reason why you can't use them in 943U.

Paul

I have used DB bits in a 115U 945 cpu, so I can see no reason why you can't use them in 943U.

Click to expand...

The fact that this is possible is due to the fact that the 115U CPU 945 is in fact an 135U CPU in a 115U housing.

In a 115U CPU's 941 thru 944 you can only use a DB bit as the first test in a network by using the P or PN instruction (don't know the English mnemonics), setting and resetting can only be done unconditionally by the SU and RU commands. And all this can even only be done in an FB.

Kind regards,