Statement List (STL) - DCE FEL ČVUT v Praze

Conversion Instructions
3.6 DTB Double Integer (32-Bit) to BCD
Format
Description
Status word
Example
DTB
DTB (binary to decimal conversion of a 32-bit integer number) interprets the content
of ACCU 1 as a 32-bit double integer and converts it to a seven-digit binary coded
decimal number (BCD).The result is stored in accumulator 1. Bit 0 to bit 27 contain
the value of the BCD number. Bit 28 to bit 31 are set to the state of the sign of the
BCD number (0000 = positive, 1111 = negative). Accumulator 2 remains unchanged.
The BCD number can be in the range of "-9,999,999" to "+9,999,999". If the number
is out of the permissible range, then the status bits OV and OS are set to 1.
BR CC 1 CC 0 OV OS OR STA RLO /FC
writes: - - - x x - - - -
STL Explanation
L MD10 //Load the 32-bit integer into ACCU 1.
DTB //Convert from integer (32-bit) to BCD, store result in ACCU 1.
T MD20 //Transfer result (BCD number) to MD20.
DTB
MD10
MD20
31... ...16 15... ...0
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 0 1 0 0 0 0 1 1
Integer to BCD
"-701" Integer
1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 1 1 1 0 0 0 0 0 0 0 1
" - " " 0 " " 0 " " 0 " " 0 " " 7 " " 0 " " 1 "
"-701" BCD
Statement List (STL) for S7-300 and S7-400 Programming
3-6 A5E00706960-01