Bcd To Signed Binary Scaling - Scl3 - Omron CPM1 Programming Manual

Conversion Instructions
5-19-12 BCD TO SIGNED BINARY SCALING – SCL3(––)
SCL3(––)
S
P1
R
Limitations
Description
276
Ladder Symbols
@SCL3(––)
S
P1
R
This instruction is available in the CQM1-CPU4@-E/-EV1 only.
S, P1+1 must be BCD.
P1 through P1+4 must be in the same data area.
DM 6144 to DM 6655 cannot be used for R.
SCL3(––) is used to linearly convert a 4-digit 4-digit BCD value to 4-digit
signed hexadecimal. SCL3(––) converts the BCD value according to a speci-
fied linear relationship. The conversion line is defined by the y-intercept and
the slope of the line specified in the parameter words P1 to P1+2.
When the execution condition is OFF, SCL3(––) is not executed. When the
execution condition is ON, SCL3(––) converts the 4-digit BCD value in S to
the 4-digit signed hexadecimal value on the line defined by the y-intercept (0,
P1) and the slope (P1+2
rounded off to the nearest integer.
The content of S can be 0000 to 9999, but S will be treated as a negative
value if CY=1, so the effective range of S is actually –9999 to 9999. Be sure to
set the desired sign in CY using STC(40) or CLC(41).
Parameter words P1+3 and P1+4 define upper and lower limits for the result.
If the result is greater than the upper limit in P1+3, then the upper limit is writ-
ten to R. If the result is less than the lower limit in P1+4, then the lower limit is
written to R.
Note The upper and lower limits for a 12-bit Analog Input Unit would be 07FF and
F800.
The following table shows the functions and ranges of the parameter words:
Parameter
P1 x-intercept (signed hex.)
P1+1 X (BCD)
P1+2 Y (signed hex.)
P1+3 Upper limit (signed hex.)
P1+4 Lower limit (signed hex.)
Operand Data Areas
IR, SR, AR, DM, HR, LR
P1: First parameter word
IR, SR, AR, DM, HR, LR
IR, SR, AR, DM, HR, LR
P1+1) and places the result in R. The result is
Function
8000 to 7FFF (–32,768 to 32,767)
0001 to 9999
8000 to 7FFF (–32,768 to 32,767)
8000 to 7FFF (–32,768 to 32,767)
8000 to 7FFF (–32,768 to 32,767)
Section 5-19
S: Source word
R: Result word
Range