Publication 1766-RM001A-EN-P - October 2008
218 Math Instructions
The Math Overflow Trap Bit shall ONLY be set if the Overflow bit is set.
Otherwise, it remains in last state.
ASN - Arc Sine
Instruction Type: output
Use the ASN instruction to take the arc sine of a number and store the
result (in radians) in the destination. The source must be greater than or
equal to -1 and less than or equal to 1. The resulting value in the
destination is always greater than or equal to -π/2 and less than or equal
to π/2, where π = 3.141592.
Enter the following parameters when programming this instruction:
• Source is the address to compute the arc sine.
• Destination is the address to store the arc sine of the Source.
Address Levels for the operands involved in the ASN can be ALL word,
ALL double word, ALL float, or a combination. These operands shall
undergo a conversion to float. The calculation of the source (in float) is
then performed, and the result is then cast to the data type of Destination.
ABS
Arc Sine
Source N7:0
0<
Dest N7:1
0<
ASN
Execution Time for the ASN Instruction
Controller Data Size When Rung Is:
True False
MicroLogix 1400 word 42.4610 µs 0.3870 µs
long word 43.1010 µs 0.3790 µs
ASN Instruction Valid Addressing Modes and File Types
For definitions of the terms used in this table see Using the Instruction Descriptions on page 92.
Parameter
Data Files
Function Files
(1)
CS - Comms
IOS - I/O
DLS - Data Log
(2)
Address Mode
(3)
Address Level
O
I
S
B
T, C, R
N
F
ST
L
MG, PD
RI/RIX
PLS
RTC
HSC
PTOX, PWMX
STI
EII
BHI
MMI
LCD
Direct
Indirect
Immediate
Int16
Immediate Int32
Immediate Float
Bit
Word
Double Word
Element
Float
Source •• •••• • • • • • • • ••••
Destination • • • • • • • •
• • •• •
(1) PTOX and PWMX files are only for use with MicroLogix 1400 BXB or BXBA unit.
(2) The Data Log Status file can only be used for the following math instructions: ADD, SUB, MUL, DIV, NEG, and SCP.
(3) See Important note about indirect addressing.
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive
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