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Copy DB to PQW, Copy PIW to DB?

Created by: labirex at: 7/3/2014 4:34 PM (5 Replies)

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7/3/2014 4:34 PM	Rate (0)
labirex Bronze Member Joined: 3/3/2011 Last visit: 9/5/2024 Posts: 81 Rating: (10)	Hi! We have install a Profibus/Bacnet gateway, in hardware config. It has 100 byte input and 600 byte output. Input andress range is PIW256..PIW355, Output range PQW256..PQW855. I have an input DB with 100 byte (DB110), and I have an Output DB with 600 byte (DB111). Is it possible copy content of DB111to PQWs, and copy PIW range to DB110 with BLKMOV? I don't want to copy with copy one by one: L DB111.DBW0 T PQW 256 .... "P#PQW 256 BYTE 600" is not a valid any pointer... Thank you!

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7/3/2014 5:48 PM	Rate (1)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 3/23/2025 Posts: 12344 Rating: (2707)	Hello labirex; You cannot use ANY pointer syntax with peripheral data. See the following FAQ, there is a sample program showing the use of indirect addressing to transfer data from the internal memory ares (such as DBs) to a section ofperipheral outputs: How do access the I/O address area indirectly and what should you watch out for when copying with the SFC20? Hope this helps, Daniel Chartier

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This contribution was helpful to 1 thankful Users Marcjan

7/3/2014 9:14 PM	Rate (0)
Jens_app Gold Member Joined: 1/5/2011 Last visit: 3/13/2025 Posts: 815 Rating: (123)	Hi labirex, You could use SCL or STL to copy your PIW's to the DB. Create a function that does such a thing. You can write something like this for copying inputs to array & link this to your DB array: ++++++++++++++++++++++++++++++++++++++++++++++ var_output "AnalogInputData" : array[0..49] of word end_var var_temp "InputAddr" : int "index" : int end_var index := 0; InputAddr := 256; for index := 0 to 49 do AnalogInputData[#index] := %IW[#InputAddr]:P; InputAddr := InputAddr + 2; end_for; ++++++++++++++++++++++++++++++++++++++++++++++ and for the analog outputs you could write something similar: ++++++++++++++++++++++++++++++++++++++++++++++ %QW[#OutputAddr] := AnalogOutputData[#index]; ++++++++++++++++++++++++++++++++++++++++++++++ BLKMOV is not needed here and not applicable either (check dchartier's link). Kind regards, Jens
	Keep it simple and on-topic. A simple straight-to-the-point answer is often of more quality than a complicated one.
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This contribution was helpful to 2 thankful Users Marcjan AutoGen_5772053

7/4/2014 9:25 AM	Rate (0)
fritz Diamond Member Joined: 10/7/2005 Last visit: 3/25/2025 Posts: 3042 Rating: (1061)	Hello Labirex One more one additional thought: If your CPU allows you to increase the Process Image, you could go down this path and then use SFC20 (or even access the I/O in the PII/PIQ directly).
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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11/29/2019 4:05 PM	Rate (0)
jamee Regular Member Joined: 8/10/2018 Last visit: 3/28/2022 Posts: 5 Rating: (1)	Link moved to: https://support.industry.siemens.com/cs/ww/en/view/22783999
	Last edited by: Jen_Moderator at: 12/02/2019 09:06:50 Optimized link.
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This contribution was helpful to 1 thankful Users SOble

5/27/2020 12:27 AM	Rate (0)
AutoGen_5772053 Advanced Member Joined: 1/12/2017 Last visit: 12/19/2022 Posts: 12 Rating: (12)	My example of FUNCTION_BLOCK for reading CHARS from Peripheral Input Bytes General Usefull lines: MW200:= db1.dbw[i]; //Example of reading DB, i - index qNew_code_Act_lenght:=%IB[Adress_HW]; //Read Peripheral Byte, where saved count of actual simbols FUNCTION_BLOCK QR_Code_Read //FB8 TITLE = 'QR_Code_Read' VERSION: '1.0' AUTHOR: AL NAME: OIL FAMILY: SAR // Typical-Attribute { S7_tasklist:='OB100'; S7_m_c:='true'; S7_blockview:='big'; S7_alarm_ui:='1' } VAR_INPUT Adress_HW :INT := 0; //Address of Scaner in Hardware Configuration iSampleT :REAL := 0.1; //Block call period, sec END_VAR VAR_OUTPUT qNew_code :BOOL := False; qNew_code_Act_lenght :BYTE ; // qQR_Code_String :STRING[36]; qQR_Code_String_x AT qQR_Code_String : Struct Max_lenght : BYTE:=B#16#23; //35dec = 23hex Act_lenght : BYTE; CHARs : ARRAY[1..35] OF BYTE; END_STRUCT; END_VAR VAR qNew_code_Act_lenght_old :BYTE; //Previous cycle i :INT; //counter END_VAR BEGIN //MW200:= db1.dbw[i]; //Example of reading DB qNew_code_Act_lenght:=%IB[Adress_HW]; //Read Peripheral Byte, where saved count of actual simbols qQR_Code_String_x.Act_lenght:= qNew_code_Act_lenght; IF (BYTE_TO_INT(qNew_code_Act_lenght) > 0) AND (BYTE_TO_INT(qNew_code_Act_lenght_old) = 0)THEN qNew_code:= TRUE; FOR i:=1 TO 35 DO qQR_Code_String_x.CHARs[i]:= %MB[Adress_HW+i]; END_FOR; END_IF; qNew_code_Act_lenght_old := qNew_code_Act_lenght; END_FUNCTION_BLOCK

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