Mitsubishi Electric MELSEC iQ-R Series - Calculating the Square Root

26 SINGLE VARIABLE FUNCTIONS
26.2 Calculating the Square Root
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26
26.2 Calculating the Square Root
SQRT(_E)
These functions calculate the square root of an input value.
Setting data
■Description, type, data type
Processing details
■Operation processing
• These functions calculate the square root of the REAL/LREAL data type value input to (s) and store the operation result in
(d).
• When the input value is defined as A and the output value is defined as B, the relationship of A and B will be as follows:
• Input a positive REAL/LREAL data type value to (s).
■Operation result
1. Function without EN/ENO
The operation processing is performed. The operation result is output from (d).
2. Function with EN/ENO
The execution conditions and operation results will be as follows.
*1 If the value FALSE is output from ENO, the output data from (d) will be undefined. Create a program so that the undefined value will not
be used in operations.
Operation error
Ladder, FBD/LD Structured text
[Without EN/ENO] [With EN/ENO] [Without EN/ENO]
d:=SQRT(s);
[With EN/ENO]
d:=SQRT_E(EN,ENO,s);
Argument Description Type Data type
EN Execution condition (TRUE: Executed, FALSE: Not executed) Input variable BOOL
s (IN) Input Input variable ANY_REAL
ENO Output status (TRUE: Normal, FALSE: Abnormal) Output variable BOOL
d Output Output variable ANY_REAL
Execution condition Operation result
EN ENO (d)
TRUE (executed) TRUE Operation result output value
FALSE (not executed) FALSE
*1
Undefined value
Error code
(SD0)
Description
3405H The input value is negative.
RnCPU
RnENCPU
RnSFCPU RnSFCPURnPCPURnPCPU
(Standard) (Safety)
(Redundant) (Process)
sd
EN ENO
ds
B = A