Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 178)

Chapter 10
Using Math Instructions
10–12
Entering the Instruction
You enter the instruction from within the program monitor functional area.
P 0 0 0 S Q R S R C
N 8 0
P 0 0 0 S Q R D E S T
N 1 1 0
When this instruction is true, the value at the source address is multiplied by
the rate value. The rounded result is added to the offset value and placed in
the destination.
Important: Anytime an underflow or overflow occurs in the destination
file, minor error bit S5/0 must be reset. This must occur before
the end of the current scan to prevent major error code 0020
from being declared. This instruction can overflow before the
offset is added.
Entering Parameters
The value for the following parameters is between –32,768 to 32,767.
•
Source must be a word address.
•
Rate is the positive or negative value you enter divided by 10,000. It can
be a constant or a word address.
•
Offset can either be a constant or a word address.
•
Dest must be a word address.
6
To enter the function code, press:
ENT
8
FUN
SCL
SCALE
Source
N7:0
100
Rate [/10000] 25000
Offset 127
Dest N7:1
377
Execution Times (
µ
sec) when:
True False
169.18 6.78
Ladder representation:
Scale Data (SCL)