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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
12 Data Operation – FNC 40 to FNC 49
12.6 FNC 45 – MEAN / Mean
12.6 FNC 45 – MEAN / Mean
Outline
This instruction obtains the mean value of data.
1. Instruction format
2. Set data
3. Applicable devices
S1: This function is supported only in FX3G/FX3GC/FX3U/FX3UC PLCs.
S2: This function is supported only in FX
3U/FX3UC PLCs.
Explanation of function and operation
1. 16-bit operation (MEAN and MEANP)
The mean value of "n" 16-bit data from is stored to .
• The sum is obtained as algebraic sum, and divided by "n".
• The remainder is ignored.
2. 32-bit operation (DMEAN and DMEANP)
The mean value of "n" 32-bit data from [ +1, ] is stored to [ +1, ].
• The sum is obtained as algebraic sum, and divided by "n".
• The remainder is ignored.
Operand type Description Data type
Head word device number storing data to be averaged 16- or 32-bit binary
Word device number storing the mean value result 16- or 32-bit binary
n Number of data to be averaged (n = 1 to 64) 16- or 32-bit binary
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD.b
KnX KnY KnM KnS
TCDRU\G V Z Modify K H E ""P
S1 S2
S1 S2
n S1
DMEAN
DMEANP
Mnemonic Operation Condition
P
FNC 45
MEAN
D
16-bit Instruction
7 steps
MEAN
MEANP
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
13 steps
Continuous
Operation
Pulse (Single)
Operation
S
1
S
D
S
1
S
S
2
D
D
1
S
D
1
D
Command
input
FNC 45
MEAN
n
S
D
n
S
S
S
+ + 1 +
………
+ + n
−
1
D
D
1
S
D
1
S
D
1
D
D
1
D
[ + 1, ] + [ + 3, + 2] +
………
+ [{ + n
×
2
−
1}, { + n
×
2
−
2}]
[ + 1, ]
Command
input
FNC 45
DMEAN
n
S
D
n
S
S
S
S
S
S
D
D