Chapter 12 Descriptions of Parameter Settings
MH300
022xh: m3/h
023xh: GPM
024xh: CFM
xxxxh: Hz
bit 0–3: the control frequency F page, user-defined unit (Pr.00-04 = d10, PID feedback value) and
the number of decimal places (Pr.00-26) which supports up to three decimal places.
bit 4–15: the control frequency F page, user-defined unit (Pr.00-04 = d10, PID feedback value)
and the displayed units for Pr.00-26.
You must convert the setting value to decimal when using the keypad to set parameters.
Example: Assume that the user-defined unit is inWG and user-defined decimal place is the third
decimal point.
According to the information above, the corresponding unit to inWG is 01Axh (x is the set decimal
point), and the corresponding unit to the third decimal place is 0003h, then inWG and the third
decimal point displayed in hexadecimal is 01A3h, that is 419 in decimal value. Thus, set Pr.00-
25 = 419 to complete the setting.
Maximum User-Defined Value
Default: 0
Settings 0: Disable
0–65535 (when Pr.00-25 set to no decimal place)
0.0–6553.5 (when Pr.00-25 set to one decimal place)
0.00–655.35 (when Pr.00-25 set to two decimal places)
0.000–65.535 (when Pr.00-25 set to three decimal places)
When Pr.00-26 is NOT set to 0, the user-defined value is enabled. After selecting the displayed
unit and number of decimal points with Pr.00-25, the setting value of Pr.00-26 corresponds to
Pr.01-00 (Maximum motor operating frequency), and then the motor operation frequency has a
linear relationship with the displayed value on the digital keypad.
Example:
When the frequency set in Pr.01-00 = 60.00 Hz, the maximum user-defined value for Pr.00-26 is
100.0%. This also means that Pr.00-25 is set at 0021h to select % as the unit.
NOTE:
Set Pr.00-25 before using Pr.00-26. After you finish setting, when Pr.00-26 is not 0, the displayed
unit on the keypad shows correctly according to Pr.00-25 settings.
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