Mitsubishi Electric MELSEC-Q/L - BCD Type Arc Cosine Operation

658
7 APPLICATION INSTRUCTIONS
7.12 Special Function Instructions
BCD type arc cosine operation
BACOS(P)
Processing details
• Returns the COS
-1
(inverse cosine) value of the value designated by (S), and stores operation results at device designated
by (D).
• A sign for the operation data is set at (S). If the operation data is a positive value, this is set at "0", and if it is a negative
value, it is set at "1".
• The part before the decimal point and fraction part are stored at (S)+1 and (S)+2 respectively, as BCD values. (Settings can
be between 0 and 1.0000.)
• The operation results stored at (D) will be a BCD value in the range of between 0 and 180 (degree units).
• Calculation results are a value from which the decimal fraction part has been rounded.
Operation error
• In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and an error code is stored into SD0.
(S): Number of the device where data of which the COS
-1
(inverse cosine) value is obtained is stored (BCD 4 digits)
(D): Head number of the devices where the operation result will be stored (BCD 4 digits)
Setting
data
Internal device R, ZR J\ U\G Zn Constant Others
Bit Word Bit Word
(S)   
(D)   
Error
code
Error details Q00J/
Q00/
Q01
QnH QnPH QnPRH QnU LCPU
4100 The operation data specified in (S) is not a BCD value.
The operation data specified in (S) is not in the range from -1.0000 to
1.0000.

4101 The points of the device specified in (S) exceed those of the corresponding
device.

Process
High
performance
Redundant Universal LCPU
Basic
BACOS
Command
Command
BACOSP
BACOSP
BACOS S D
S D
COS
+2
Integer part
Decimal fraction part
.
Sign
+1
)(
D
S
S
S
1