Skip to Content

Register Login

Default Header

(header konnte nicht geladen werden)

Navigation

bit constant for input of FB

Created by: pici_c at: 5/15/2008 2:08 PM (5 Replies)

Rating (0)

Thanks 0

6 Entries

5/15/2008 2:08 PM	Rate (0)
pici_c Posts: 80 Rating: (2)	Hi! I wrote my own FB, which has 2 functions. For input of the FB, I reserved 2 bools which represents the 2 functions (in, out). I want to call this FB from another FB with constant inputs, not with memory bits (see picture). what is the right filling of the inputs? thanks pici_c Attachment FB.JPG (321 Downloads)
pici_c Posts: 80 Rating: (2)
Suggestion To thank Quote Answer

5/15/2008 2:40 PM	Rate (0)
simaticmanager Posts: 150 Rating: (5)	dear pici_c, first of all u can not put constant forOUT and IN_OUT type of variable in any case.and also u have to use log0 and log1 for bool type of IN variable bcos if u want to put constant then block variable should be IN (not IN_OUT orOUT type) and data type may WORD, INT, DINT,REAL etc. BUT not BOOL and BYTE. rgds simatic manager
simaticmanager Posts: 150 Rating: (5)
Suggestion To thank Quote Answer

5/15/2008 3:18 PM	Rate (0)
Aret Posts: 2348 Rating: (265)	You can specify constants as actual input parameters - but in STL:^)
Aret Posts: 2348 Rating: (265)
Suggestion To thank Quote Answer

5/15/2008 3:23 PM	Rate (0)
simaticmanager Posts: 150 Rating: (5)	dear alert, thnks for updating me. i normaly do not write in stl. Can u eaxplain the same in detaills. rgds simaticmanager
simaticmanager Posts: 150 Rating: (5)
Suggestion To thank Quote Answer

5/15/2008 5:53 PM	Rate (0)
Denilson Pegaia Diamond Member Joined: 9/23/2005 Last visit: 1/2/2026 Posts: 4436 Rating: (1487)	Hi, TIP: call your block in LAD/FDB as usual. Fill these inputs with some variable (e.g. M0.0). Go to menu View and change the visualization to STL. Substitue the M0.0 for constants (TRUE/FALSE)
	Denilson Pegaia Siemens Industry Sector Technical Support
Suggestion To thank Quote Answer

5/16/2008 2:46 PM	Rate (0)
Aret Posts: 2348 Rating: (265)	No problems^) 1) When you make STL code you can write something like CALL FC1 .... x := TRUE // input BOOL variable ..... 2) YoucanwriteeverythinginLAD,swithtoSTL,makeFCcall,swithback. 3) In LAD/FBD you can't do it. So i'd suggest using OR command of 2 excluding bits (result is always =1). It's like Pegaia suggestion, but you don't care if M0.0 is 1 or 0.... PS. I'm that alerting:^))) Attachment LAD_1_sample.jpg (310 Downloads)
Aret Posts: 2348 Rating: (265)
Suggestion To thank Quote Answer

|

Share this page:

Share this page on...

Follow us on