Ch[ ] Scaling Value (Un\G50 To Un\G57) - Mitsubishi Q68TD-G-H01 User Manual

3
SPECIFICATIONS
3.4.17
The result of scaling measured temperature values is stored.
(1) Data storage
(2) How to calculate the scaling value.
[Setting example] To scale a temperature to percent (for the use of thermocouple K)
3
- 52 3.4 Buffer Memory

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

CH[ ] Scaling value (Un\G50 to Un\G57)
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 Scaling width upper/lower limit values (Un\G78 to Un\G93), and then the result
is stored.
The following is how to calculate the scaling value.
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
(a) Setting value
• Scaling range: -100 to 500
• Scaling width: 0 to 100% (lower limit value = 0, upper limit value = 100)
(b) Input value
CH1 measured temperature value: 360
Scaling value =
3600 - (-1000)
(100 - 0)
5000 - (-1000)
Figure 3.35 Setting example of scaling value
POINT
(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.
(lower limit value = -1000, upper limit value = 5000)
(Measured temperature value = 3600)
+ 0 = Fractional portion is rounded off.
76.666666
= 77[%]
Stores into buffer memory address 50.
Scaling range
+ scaling width lower limit value
Scaling