Mitsubishi Electric MELSEC-Q/L Programming Manual page 168

Ex.
Underflow
T#-24d20h31m23s648ms
(80000000 )
H
Since the highest-order bit is 0, the result value is positive.
■Operation result
• Function without EN/ENO
An operation is executed and the operation value is output from (d).
• Function with EN/ENO
The following table shows the executing conditions and operation results.
EN
TRUE (Operation execution)
FALSE (Operation stop)
*1 When FALSE is output from ENO, the data output from (d) is undefined. In this case, create a program so that the data output from (d) is
not used.
Operation error
• No operation error occurs.
Program example
■ADD_TIME(_E)
The program which performs addition ((s1) + (s2)) on time type data input to (s1) and (s2), and outputs the operation result
from (d) in time type.
• Function without EN/ENO (ADD_TIME)
[Structured ladder/FBD]
[ST]
g_time3 := ADD_TIME(g_time1, g_time2);
• Function with EN/ENO (ADD_TIME_E)
[Structured ladder/FBD]
[ST]
g_bool3 := ADD_TIME_E(g_bool1, g_time1, g_time2, g_time3);
5 APPLICATION FUNCTIONS
166
5.8 Functions of Time Data Type
+
T#-2ms T#24d20h31m23s646ms
(FFFFFFFE )
H
ENO
TRUE
*1
FALSE
(7FFFFFFE )
H
(d)
Operation output value
Undefined value