Mitsubishi AL2 Series User Manual

α2 Simple Application Controllers
Function Blocks 6
6 - 52
6.23 Subtraction Block
The function block is used to subtract inputs B from A hence produce the resultant Y.
Table 6.23: Subtraction Function Block
Setup of the Subtraction Function Block directly from the
α2 Series Controller
1 ) Allocate the input pin to be used for the function block.
2 ) Press the “OK” key with the cursor in the function block. The function block edit screen is
displayed as shown.
3 ) Press the “OK” Key and enter the function block settings using the “ and ” keys. The
Subtraction operation y=A-B must be specified.
4 ) Using the “ and ” keys highlight Constant A and press the “OK” key to enter either a
Directset, Analog In or FB Value.
5 ) Repeat step 4 for Constant B and return to the FBd using the “ESC” key.
Function Set Item Description
I Input pin for subtraction function block
FB
This function block operates the expression Y=A-B.
The value of Y,A and B is in the range: -32768 to 32767
a) A,B
- Constant value (Setting range:-32768 to 32767
- Analog value
- FB value
Output
1) Word Output
When the input pin is ON, Y=A-B is executed and the word output will
be given the result. When the input pin is OFF the expression is not
executed and the Y value will retain the last result.
2) Bit Output
- Operation result Y<32768: Output pin turned ON and the operation
result Y will be set to -32767
- Operation result Y>32767: Output pin turned ON and the operation
result Y will be set to 32767
000
US
OI
B
P
B001 : S
Change No
De l e t e FB
BU
Se t up FB
Ou t p u t aVl
y=A-B
0
B001 : S BU
Di rectSet
Ana l og I n
FB Va l ue
B001 : S BU

Mitsubishi AL2 Series Specifications

General

Model	AL2 Series
Digital Inputs	Yes
Digital Outputs	Yes
Type	PLC
Manufacturer	Mitsubishi
Input Voltage	100 to 240 VAC or 24 VDC (depending on model)
Output Voltage	24V DC
Number of Inputs	8 to 64 (depending on model)
Number of Outputs	6 to 64 (depending on model)
Programming Language	Ladder Diagram
Communication Ports	RS-232, RS-485, Ethernet (depending on model)
Operating Temperature	0 to +55°C
Storage Temperature	-20°C to 70°C
Humidity	10% to 90% (non-condensing)
Weight	Varies depending on the model