5-76
5-6 Operation Functions
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
5
Functions
PID scale
When PID Scale (A075) is set, the following parameters undergo scale conversion.
(Value after conversion) = (Value before conversion) × (A075)
Feedback Selection
Select a terminal used for the feedback signal in PID feedback selection A076.
The target value depends on the terminal selected in frequency reference A001 other than that
in A076. Also note that when A001 is set to "01: Control circuit terminal block," the setting of
FV/FI Selection (A005) is disabled.
To specify "02: Modbus communication (Modbus-RTU)" for PID Feedback Selection (A076),
transfer the data as follows.
Write the data in holding register address 0006h based on 100% representing 10,000.
Note: You can read and write data. However, you can read data only when Modbus-RTU is selected for
the PID feedback.
Data cannot be read under other settings.
If "03: Pulse train input" is set for PID Feedback Selection (A076), the Inverter obtains a
percent conversion result (100% at maximum frequency) of the input pulse train frequency (Hz)
as a feedback value.
For details on pulse train input frequency, refer to "Pulse Train Frequency Input" on page 5-82.
Feedforward Selection
Select a terminal used for feedforward signals in PID Feedforward Selection A079.
The A079 setting is enabled even if the terminal selected in A079 is duplicated with the terminal
selected for target value or feedback value input.
If A079 is set to "disabled", feedforward control is disabled.
d004 F001 A011 A012 A020 A220 A021 A022
A023 A024 A025 A026 A027 A028 A029 A030
A031 A032 A033 A034 A035 A101 A102 A145
Register
Number
Function name
Parameter
No.
R/W
Monitor and setting
parameters
Data
Resolutio
n
0006h
PID Feedback
Selection
− R/W 0 to 10000 0.01 [%]