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If you have any problems with the registration process or your account login, please. • Disaster Relief Assistance is avalible on HVAC-Talk. First off, only Global Controllers are capable of doing subroutines. When you open a new Visualogic drawing, you will get to choose between a VLC or Global. Opening a new Global controller file will include the necessary subroutine functions in your shapes. The key functions are, Function 1, which is the End of Normal Programming, (used in all controllers) Function 2, which is the End of Subroutine Programming (which denotes the end of each piece of subroutine code) Function 67, which is the Subroutine Caller. (the parameter list) Function 3, which is the Set Context function.

(for variable address referencing) For the VAV job example I would program the VAV subcallers starting at 21xx, with the XX being the VAV number. I normally use Seq 3999 for my End of Normal Device.

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Any Subroutine sequences will be >3999. I normally use seq 5000 to start my main subroutine. Joey Jordison Limited Edition Drum Kit.

Seq 5000 would then be entered in the Device 67 box. There is no special device needed to begin a subroutine, but if you say the SR starts at 5000, there had better be a device at seq 5000 for the program to branch to, or the program will silently crash. I usually place a generic transfer device to leave in the start location, so it won't be changed or removed by mistake. You will need an End of Subroutine Device (2) at the end of each subroutine to prevent DDC execution into the next subroutine. If you want to get fancy you can program in a multiple entry subroutine that is entered at different sequence numbers but exits out at one End of Subroutine Device. Function 3, the Set Context Function is the key to processing varying Device IDs in one Subroutine. This function will use a number from the Device 67 parameter list to allow on the fly reset of which Device ID the SR is accessing.

You will use an address like Context AI-1 to read AI-1 from whichever is the current Subcaller being executed. Remember, If you write to a specific point, such as a directly addressed (not context) AV-24 in a subroutine, it will be written to every time that SR is executed.

You probably want to initialize a Branch Variable before the subcallers, and then write that final value into an AV point after all of the Subcallers have executed. For accumulators and the like. I hope I didn't make too many mistakes here. Many thanks, I think I got many things clear now.

But still, I'm confused in what the SR is used for in that case. I'd say 'and Please correct' It would be used to calculate Air flow for Each VAV using Fun 6:Velocity Pressure to fpm Converter 'Why I should use SR It is only a single function' any way where to but that function what is the sequence the DDC would follow. How the Subroutine Caller(fun:67) Parameters would be used and for which device instance I mean which function assign the device instance to fun:67 Parameters. Aplikasi Pembobol Wifi Dengan Laptop. Sorry for the confusion.