Function Applications
-440-
The upper and lower limits and range of the frequency output when the PID is used as the main
frequency source are described as follows (for example, when the frequency source is only PID or main
+ PID).
When the reverse cut-off frequency is 0 or reverse running is inhibited (that is, any of the following):
① FA-08 = 0, F8-13 = 0; ② FA-08 = 0, F8-13 = 1; ③ FA-08 ≠ 0, F8-13 = 1
Output upper limit = Frequency upper limit
Output lower limit = Frequency lower limit
Output range = Frequency lower limit to frequency upper limit (that is, F0-14 to F0-12)
When the reverse cut-off frequency is not 0 and reverse running is allowed (that is, FA-08 ≠ 0, F8-13 =
0):
Output upper limit = +Frequency upper limit, Output lower limit = –Reverse cut-off frequency
Output range = –Reverse cut-off frequency to +Frequency upper limit (–FA-08 to +F0-12)
Figure 4-19 PID parameter switchover
Figure 4-20 PID initial value function
4.1.2.8 Communication Control
When F0-02 is set to 2, the operation commands such as start and stop of the AC drive are set through
communication (the "computer" indicator on the operating panel of the power supply unit blinks).
The AC drive supports the following five methods for communication with the host controller: Modbus,
CANopen, CANlink, PROFINET, and EtherCAT, which cannot be used at the same time. The EtherCAT
and PROFINET communication cards are optional, which can be selected as required. If EtherCAT or
PROFINET communication is used, the corresponding communication card must be installed.
CANopen, CANlink, PROFINET, and EtherCAT need to be selected according to the value of Fd-10 of the
power supply unit. Modbus is always enabled.
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