Omron SYSMAC CS Series Instruction & Reference Manual page 628

3. Instructions
Flags
Name
Error Flag
Equals Flag
Carry Flag
Function
SCL2(486) is used to convert the signed binary data contained in the source word S into signed BCD
data (the BCD data contains the absolute value and the Carry Flag shows the sign) and place the result
in the result word R according to the linear function defined by the slope (ΔX, ΔY) and an offset. The
address of the first word containing ΔX, ΔY, and the offset is specified for the first parameter word P1.
The sign of the result is indicated by the status of the Carry Flag (ON: negative, OFF: positive).
The following equations are used for the conversion.
ΔY
R = BCD conversion of ΔX
Note: The slope of the line is ΔY/ΔX.
The offset and slope can be a positive value, 0, or a negative value. Using a negative slope enables
reverse scaling.
• The result will be rounded to the nearest integer.
• The result in R will be the absolute BCD conversion value and the sign will be indicated by the Carry
Flag. The result can thus be between –9999 and 9999.
• If the result is less than –9999, –9999 will be output as the result. If the result is greater than 9999,
9999 will be output.
Positive Offset
R (signed BCD)
Offset
S (signed binary)
Offset
P1
ΔY
P1+1
ΔX
P1+2
594
Label
ER • ON if the contents of C+1 (ΔX) is 0000.
• ON if the contents of C+2 (ΔY) is not BCD.
• OFF in all other cases.
= • ON if the result is 0.
• OFF in all other cases.
CY • ON if the result is negative.
• OFF if the result is zero or positive.
× ((BCD conversion of S) – (BCD conversion of offset)
Negative Offset
R (signed BCD)
ΔY
ΔX
Offset
Offset of 0000
(Signed binary)
R (signed BCD)
(Signed binary)
(Signed BCD)
Offset = 0000 hex
Operation
ΔY
ΔX
S (signed binary)
ΔY
ΔX
S (signed binary)
CS/CJ/NSJ Series Instructions Reference Manual (W474)