kevintfa
Member
If I Got This Correctly,in Order To Make A Sfb Timer, I Need To Add It In One Of The Sfb Blocks In The Library....which In My Case Is Write Protected. Do I Have This Right? If So Does Anyone Know A Way Around It?
Siemens Sfb Timer
- Thread starter kevintfa
- Start date
L D[AR2P#0.0]
Lifetime Supporting Member
Open a block in your project where you want to call the SFB timer, I'm using OB1 in this example. Make sure the overviews button is pressed, then drill down into the libraries and drag SFB4 onto a blank network. Give it an instance DB and then parameterize it and away you go. Once you have used the SFB it will appear in your list of blocks in your project. (If you want to use SFB's inside an FB you can declare multiple instances - more of that later if required)
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Ok, Up To Here All Good, I Have The Timer Displayed In The Network. When You Say Give It An Instance And Parameterize, How Exsactly Do I Do That? I Want To Use Db301, Which In My Project Is General Timers. When "parameter Assignment For Data Blocks" Opens,there Are 7 Timers In There, With Adresses From 0.0 To 132.0. How Do I Add My New Timer In There?
L D[AR2P#0.0]
Lifetime Supporting Member
Each call to the SFB requires an instance data block. By parameterize I mean supply the logic for starting the timer (IN), and setting the time delay (PT). The Q output is the delayed output and ET is the elapsed time. These timers work by calling them from the program - they do not operate like S5 timers which are part of the 'operating system'.
PeterW
Member
If you want to use DB301 as a standard for timers, then you could create a FB for for timers and place all the SFB calls in that one block. Then make DB301 the instantaneous DB for that.
If on the other hand, DB301 is a block you want as an HMI interface containing just the presets and actiual for timers, then you could just have DB301.DBWx addesses for the timers. You wold still need an instance DB as all FB's and SFB's require them.
If on the other hand, DB301 is a block you want as an HMI interface containing just the presets and actiual for timers, then you could just have DB301.DBWx addesses for the timers. You wold still need an instance DB as all FB's and SFB's require them.
I Supplied The Logic, Filled In The Preset Time, Assigned The Output. In The Main Program I Called Fb9, And Db309 Which Is The Db Assigned To The Fb. What Do I Have To Enter In The Top Of The Timer? When I Save The Fb It Keeps Telling Me I Have To Enter Something There. I Tryed Db309, Doesn't Like It....then My Computer Completely Shut Off ( I Just Love Toshiba Laptops!)
PeterW
Member
Every FB/SFB call requires its own DB, you cannot assign a used DB, as the DB needs to match the FB parameters. The DB is created by the systen when you call.
If you didn't want to create another DB, then in the FB9 STAT parameters, add a BLOCK_FB parameter and set it up as SFB4.
You can then drag that block from the multiple instances folder instead of the library folder, it will become part of DB309.
If you didn't want to create another DB, then in the FB9 STAT parameters, add a BLOCK_FB parameter and set it up as SFB4.
You can then drag that block from the multiple instances folder instead of the library folder, it will become part of DB309.
L D[AR2P#0.0]
Lifetime Supporting Member
Here's an example:
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