Mitsubishi Q Series User Manual (English)

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MELSEC-Q

3 SPECIFICATIONS

3.2.14 Scaling function

The scaling function scales the measured value and stores it in the scaling value

(buffer memory address: 196, 212).

The conversion method differs depending on micro voltage, voltage, current input in

the case of thermocouple input.

The conversion method is automatically selected by the setting of input range (buffer

memory address: 32, 64).

(1) Thermocouple input

The measured value within the scaling range set by the scaling range upper

limit value (buffer memory address: 197, 213) and also scaling range lower limit

value (buffer memory address: 198, 214) is, by performing the scaling, set to

the scaring width set by the scaling width upper limit value (buffer memory

address: 199, 215) and also scaling width lower limit value (buffer memory

address: 200, 216).

The following describes the calculation method of scaling value.

= ( S

CWU

- S

CWL

)

+ S

CWL

EPV

- S

CRL

CRU

- S

CRL

CV : Scaling value

CWU : Scaling width upper limit value

CWL : Scaling width lower limit value

EPV : Set value

CRU : Scaling range upper limit value

CRL : Scaling range lower limit value

Example) When scaling the temperature to a percentage (%)

When scaling the temperature 360

(temperature conversion value:

3600) in the following setting.

Scaling range: -100 to 500

(lower limit value = -1000, upper limit

value = 5000)

Scaling width: 0 to 100% (lower limit value = 0, upper limit value =

100)

+ 0

3600 - (-1000)

5000 - (-1000)

= 76.6666

= 77 (%)

Scaling value = (100 - 0)

Rounded to the whole number.

POINT

The scaling is performed by the above method even if the upper limit value is set

smaller than the lower limit value for the scaling range upper/lower limit value and

scaling width upper/lower limit value.

When the upper limit value is set equal to the lower limit value, the scaling is not

performed.

When the measured values out of the range set with the scaling range upper/lower

limit value are measured, the values set with the scaling width upper/lower limit

value are stored.

Other manuals for Mitsubishi Q Series

Programming Guide194 pages

Connectivity Guide5 pages

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Mitsubishi Q Series Specifications

General

I/O Points	Up to 4096 points
Communication	Ethernet, RS-232, RS-485
I/O Modules	Digital, Analog, Specialized
Programming Language	Function Block Diagram, Structured Text
Power Supply	24V DC, 100-240V AC
Operating Temperature	0°C to 55°C
Shock Resistance	147 m/s2 acceleration, 3 times in each of X, Y, and Z directions
Program Capacity	Up to 252K steps