Chapter 7 Explanation of Functions
7 - 28
7.5.11 Multispeed select setting (CF1 to CF3 and SF1 to SF3)
The multispeed select setting function allows you to set multiple motor speeds and switch among them by
way of signal input via specified terminals.
Multispeed operation can be performed in two modes: binary operation mode (with up to 8 speeds) using
three input terminals and bit operation mode (with up to 4 speeds) using three input terminals.
Item Function code Data Description
Multispeed
operation selection
A019
00 Binary operation mode with up to 8 speeds
01 Bit operation mode with up to 4 speeds
Multispeed 0 to 7
settings
A020/A220
A021 to A027
0.00 or "start frequency" to
"maximum frequency" (Hz)
Setting of the frequency as each speed
(1) Binary operation mode
Assign functions "02" (CF1) to "04" (CF3) individually to the terminal [1] to [5] functions (C001 to C005) to
make multispeed s 0 to 7 available for selection.
Specify the desired frequencies for speeds 1 to 7 by setting multispeeds 1 to 7 (A021 to A027).
You can set speed 0 by using function "A020", "A220" or "F001" when you have specified the digital
operator for the frequency source setting. You can set speed 0 by using the O/OI terminal when you have
specified the control circuit board for the frequency source setting.
Multispeed CF3 CF2 CF1
Speed 0 OFF OFF OFF
Speed 1 OFF OFF ON
Speed 2 OFF ON OFF
Speed 3 OFF ON ON
Speed 4 ON OFF OFF
Speed 5 ON OFF ON
Speed 6 ON ON OFF
Speed 7 ON ON ON
- With multispeed binary operation mode, you can use the multistage speed determination time setting
(C169) to specify a delay to be set until the relevant terminal input is determined. (time = C169*10ms)
Use this specification to prevent the application of fluctuating terminal input before it is determined.
- The input data is finally determined when terminal input becomes stable after the delay set as C169.
(Note that a long determination time deteriorates the input terminal response.)
(2) Bit operation mode
- Assign functions "32" (SF1) to "34" (SF3) individually to the terminal [1] to [5] functions (C001 to C005) to
make multispeed s 0 to 3 available for selection.
- Specify the desired frequencies for speeds 1 to 3 (SF1 to SF3)
by setting multispeeds 1 to 3 (A021 to A023).
If two or more input terminals are turned on at the same
time, the terminal given the smallest terminal number
among them has priority over others. The "X" mark in the above table indicates that the speed can be
selected, regardless of whether or not the corresponding terminal is turned on.
Multispeed SF3 SF2 SF1
Speed 0 OFF OFF OFF
Speed 1 × × ON
Speed 2 × ON OFF
Speed 3 ON OFF OFF
Speed 0
Speed 1
Speed 1
Speed 2
Speed 3
SF1
SF2
SF3
FW
Frequency input from the digital
operator or via an external analog
input terminal
Frequency input from the digital
operator or via an external analog
input terminal
Speed 2
Speed 3
Speed 5
Speed 6
Speed 7
Speed 4
Speed 0
Speed 1
FW
CF3
CF2
CF1
C169
CF1
Set Frequency
Speed 5
S
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