FUNCTION CODES
Chap 5
■ Unavailable Function Codes
During master-follower operation, the following functions are not available.
F16
Frequency Limiter (Low)
C30
C01 to C04:Jump Frequency
Selecting “Vector control for induction motor with speed sensor” (F42 = 6) disables the settings of the following
functions during master-follower operation, as well as making the above functions unavailable.
F07, F08
Acceleration Time 1/Deceleration Time 1
E10, E11
Acceleration Time 2/Deceleration Time 2
E12, E13
Acceleration Time 3/Deceleration Time 3
E14, E15
Acceleration Time 4/Deceleration Time 4
F24
Starting frequency (Holding time)
F39
Stop frequency (Holding time)
During master-follower operation, the following control should be disabled (H18 = 0, J01 = 0).
H18
Torque control
J01
PID control
Configuring Function Codes
To perform master-follower operation, be sure to select a control mode with speed sensor (F42 = 3, 4 or 6) and
configure the function codes given in this section.
■ Data setting for master-follower operation
F01
Frequency setting 1
C30
Frequency setting 2
Select the pulse train input (F01/C30 = 12) as a reference command source.
Switching between master-follower operation and individual operation is possible using the “Hz2/Hz1” terminal
command (see Figure 5.3-25 and Figure 5.3-26). The switching example is given below.
(Example) Turning terminal [X1] ON for individual operation during which a digital frequency command drives the
inverter
Set F01 and C30 data to “12” and “0”, respectively. And set E01 data to “11” to assign the “Hz2/Hz1” command to
terminal [X1].
It is recommended to perform switching between master-follower operation and individual operation when the
inverter is stopped. Switching when the inverter is running may activate the protective function. To avoid it,
decrease the difference between the output frequency and the reference frequency to apply after switching.
F07/E10/E12/E14
Acceleration Time
F08/E11/E13/E15
Deceleration Time
Also in master-follower operation, the inverter controls the output frequency according to the acceleration
/deceleration time as usual. Set the acceleration/deceleration time as short as possible. Be careful that, setting the
acceleration/deceleration time longer than that of the reference inverter loses the following capability of the
follower motor.
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