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s5 to s7 converting

Created by: Import-User-1 at: 12/3/2010 8:08 AM (2 Replies)

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12/3/2010 8:08 AM	Rate (0)
Import-User-1 Posts: 3609 Rating: (29)	Import of a Technical Question of an User Guest JU FB 221 Name : ANZ.STEU ZWDB: DB 39 HMER: F 14.1 FEHL: FY 49 ADAT: QW21 QUIT: I 6.0 -------------------------------- A =HMER JC =M001 L KB 0 T FY 240 LW =ZWDB ( I DON'T KNOW!! ) T FY 245 ' ' ' DO =ZWDB ( C DB39 ) LW =ZWDB ( I DON'T KNOW!! ) T DW 11 L DW 10 ><F = F240.4 . . . .
Import-User-1 Posts: 3609 Rating: (29)
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12/4/2010 9:25 PM	Rate (0)
jklm Platinum Member Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating: (309)	Hello, LW= <param> loads the bit pattern of the formal operand specified at <param> in ACCU1. In the programming manual, For the "LW=" operation, permissible data types include a binary pattern (KM) or a hexadecimal pattern (KH), two absolute numbers of 1 byte each (KY), a character (KS), a fixed point number (KF), a timer value (KT) and a counter value (KC). And in your example, ZWDB is a bloc (DB39) and not matching the classical allowed datatypes. I guess that ACCU1 will be loaded with the machine code of C DB39 (when DB39 is the formal parameter).
	Best regards jklm Suggestion was helpful? Feel free to rate it.
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12/5/2010 9:20 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 12/21/2024 Posts: 3029 Rating: (1058)	Hello Guest jklmis correctthat the manual does NOT list "B" (Block) type parameters as a permissble parameter for the "LW =" instruction. I can tell youthough that it can be used and that it was quite commonly done too in the good old S5 days. What you end up with is thenumber of the Block in accu1-LL and a (typically unused) value that represents the Block typeaccu1-LH (and accu1-H is 0). What this means in your particalur case is this (assume DB39 is used as actual parameter for "ZWDB"): LW =ZWDB// accu1 =0000 xx27 hex (I think xx is 20 hex for a DB parameter, but don't quote me on that) T FY 245 // contains value of 27 hex= 39 decimal I hope this helps
	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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