Mitsubishi Electric MELSEC iQ-R Series - Addition; Chapter 27 Arithmetic Operation Functions

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27 ARITHMETIC OPERATION FUNCTIONS
27.1 Addition
27 ARITHMETIC OPERATION FUNCTIONS
27.1 Addition
ADD(_E)
These functions output the sum of input values ((s1)+(s2)++(s28)).
*1 The input variable s can be changed within the range from 2 to 28.
Setting data
■Description, type, data type
Processing details
■Operation processing
• These functions add the INT, DINT, REAL, or LREAL data type values input to (s1) to (s28) ((s1)+(s2)++(s28)), and output
the operation result, in the same data type as (s), from (d).
Ex.
Data type: INT
• Input an INT, DINT, REAL, or LREAL data type value to (s1) to (s28).
• If an underflow or overflow occurs in the operation result, the output from (d) will be as follows.
Ladder, FBD/LD
*1
Structured text
*1
[Without EN/ENO] [With EN/ENO] [Without EN/ENO]
d:=ADD(s1,s2);
[With EN/ENO]
d:=ADD_E(EN,ENO,s1,s2);
Argument Description Type Data type
EN Execution condition (TRUE: Executed, FALSE: Not executed) Input variable BOOL
s1 (IN1) to s28 (IN28) Input Input variable ANY_NUM
ENO Output status (TRUE: Normal, FALSE: Abnormal) Output variable BOOL
d Output Output variable ANY_NUM
Data type: INT Data type: DINT Data type: REAL/LREAL
• Even if an underflow or overflow occurs, no
operation error is issued. When ADD_E is used,
ENO outputs TRUE.
[Example 1]
32767+2=-32767
(7FFFH)+(0002H)=(8001H)
A negative value results because the most
significant bit is 1.
[Example 2]
-32767+(-2)=32766
(8000H)+(FFFEH)=(7FFEH)
A positive value results because the most
significant bit is 0.
• Even if an underflow or overflow occurs, no
operation error is issued. When ADD_E is used,
ENO outputs TRUE.
[Example 1]
2147483647+2=-2147483647
(7FFFFFFFH)+(00000002H)=(80000001H)
A negative value results because the most
significant bit is 1.
[Example 2]
-2147483648+(-2)=2147483646
(80000000H)+(FFFEH)=(7FFFFFFEH)
A positive value results because the most
significant bit is 0.
An operation error occurs and an undefined value
is output.
RnCPU
RnENCPU
RnSFCPU RnSFCPURnPCPURnPCPU
(Standard) (Safety)
(Redundant) (Process)
s1 d
s2
EN ENO
ds1
s2
(s1)
(s2)
(d)
69125678+1234
INTINTINT