Ch[ ] Scaling Value (Un\G50 To Un\G57) - Mitsubishi Melsec-Q Series User Manual

3
SPECIFICATIONS
3.4.17

CH[ ] Scaling value (Un\G50 to Un\G57)

The result of scaling measured temperature values is stored.
(1) Data storage
Measured temperature values within the scaling range set in CH
upper/lower limit values (Un\G62 to Un\G77) are scaled to the scaling width set in
CH
is stored.
(2) How to calculate the scaling value.
The following is how to calculate the scaling value.
[Setting example] To scale a temperature to percent (for the use of thermocouple K)
(a) Setting value
(b) Input value
Scaling value =
(100 - 0)
POINT
Scaling width upper/lower limit values (Un\G78 to Un\G93), and then the result
Scaling value =
(scaling width upper limit value - scaling width lower limit value)
measured temperature value - scaling range lower limit value
scaling range upper limit value - scaling range lower limit value
Figure 3.34 How to caluculate the scaling value
• Scaling range: -100 to 500
• Scaling width: 0 to 100% (lower limit value = 0, upper limit value = 100)
CH1 measured temperature value: 360
3600 - (-1000)
+ 0 =
5000 - (-1000)
= 77[%]
Figure 3.35 Setting example of scaling value
(1) If the upper limit value is less than the lower limit value in the settings of CH
Scaling range upper/lower limit values (Un\G62 to Un\G77) or CH
width upper/lower limit values (Un\G78 to Un\G93), it will not result in an error
and the scaling value calculated with the expression above will be output.
(2) When the measured temperature is out of the range set in Scaling range
uppr/lower limit values, the value set in Scaling width upper limit value or
lower limit value is stored into this buffer memory.
3.4.17 CH[ ] Scaling value (Un\G50 to Un\G57)
+ scaling width lower limit value
(lower limit value = -1000, upper limit value = 5000)
(Measured temperature value = 3600)
Fractional portion is rounded off.
76.666666
Stores into buffer memory address 50.
3.4 Buffer Memory
1
2
Scaling range
3
4
5
6
Scaling
7
8
3
- 49