Statement List (STL) - DCE FEL ČVUT v Praze

3 Conversion Instructions
3.1 Overview of Conversion Instructions
Description
You can use the following instructions to convert binary coded decimal numbers and
integers to other types of numbers:
• BTI BCD to Integer (16-Bit)
• ITB Integer (16-Bit) to BCD
• BTD BCD to Integer (32-Bit)
• ITD Integer (16-Bit) to Double Integer (32-Bit)
• DTB Double Integer (32-Bit) to BCD
• DTR Double Integer (32-Bit) to Floating-Point (32-Bit IEEE-FP)
You can use one of the following instructions to form the complement of an integer or
to invert the sign of a floating-point number:
• INVI Ones Complement Integer (16-Bit)
• INVD Ones Complement Double Integer (32-Bit)
• NEGI Twos Complement Integer (16-Bit)
• NEGD Twos Complement Double Integer (32-Bit)
• NEGR Negate Floating-Point Number (32-Bit, IEEE-FP)
You can use the following Change Bit Sequence in Accumulator 1 instructions to
reverse the order of bytes in the low word of accumulator 1 or in the entire
accumulator:
• CAW Change Byte Sequence in ACCU 1-L (16-Bit)
• CAD Change Byte Sequence in ACCU 1 (32-Bit)
You can use any of the following instructions to convert a 32-bit IEEE floating-point
number in accumulator 1 to a 32-bit integer (double integer). The individual
instructions differ in their method of rounding:
• RND Round
• TRUNC Truncate
• RND+ Round to Upper Double Integer
• RND- Round to Lower Double Integer
Statement List (STL) for S7-300 and S7-400 Programming
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