Mitsubishi Electric MELSEC iQ-R Series - Converting REAL to LREAL

25 TYPE CONVERSION FUNCTIONS
25.42 Converting REAL to LREAL
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25
25.42 Converting REAL to LREAL
REAL_TO_LREAL(_E)
These functions convert a value from REAL data type to LREAL data type.
Setting data
■Description, type, data type
Processing details
■Operation processing
• These functions convert the value input to (s) from REAL data type to LREAL data type, and output the converted value
from (d).
• Input a REAL data type value to (s).
• The number of significant digits is about seven because a REAL data type value is processed in 32-bit single precision.
• If the integer value exceeds the range of -16777216 to 16777215, a rounding error occurs in the converted value.
■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.
Ladder, FBD/LD Structured text
[Without EN/ENO] [With EN/ENO] [Without EN/ENO]
d:=REAL_TO_LREAL(s);
[With EN/ENO]
d:=REAL_TO_LREAL_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 REAL
ENO Output status (TRUE: Normal, FALSE: Abnormal) Output variable BOOL
d Output Output variable LREAL
Execution condition Operation result
EN ENO (d)
TRUE (executed) TRUE Operation result output value
FALSE (not executed) FALSE
*1
Undefined value
RnCPU
RnENCPU
RnSFCPU RnSFCPURnPCPURnPCPU
(Standard) (Safety)
(Redundant) (Process)
sd
EN ENO
ds
(s)
(d)
1234.01234.0
LREALREAL