Mitsubishi MELSEC Q Series - Page 87

5.1 Type Conversion Functions
5.1.17 Single-precision real type
→ double-precision real type conversion
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5
APPLICATION FUNCTIONS
REAL_TO_LREAL(_E )
REAL_TO_LREAL(_E)
Operation Error
An operation error occurs in the following cases.
• The input value is -0 or outside the following range. (Error code: 4140)
0, 2
-126
| | 2
128
• The operation result is outside the following range (an overflow occurrence).
(Error code: 4141)
2
1024
| operation result |
Program Example
The program which converts single-precision real type data input to into double-precision real
type data, and outputs the operation result from .
(a) Function without EN/ENO (REAL_TO_LREAL)
[Structured ladder]
[ST]
g_lreal1:= REAL_TO_LREAL(g_real1);
(b) Function with EN/ENO (REAL_TO_LREAL_E)
[Structured ladder]
[ST]
g_bool3 := REAL_TO_LREAL_E(g_bool1, g_real1, g_lreal1);
s
s
d