Using Intelligent Input Terminals
Oper
ations
a
nd Moni
tor
ing
4–16
The example with eight speeds in the figure below shows how input switches configured for
CF1 – CF3 functions can change the motor speed in real time.
Multi-speed Override Feature -
The multi-speed function can selectively override the
external analog speed reference input. When the Frequency Source Setting parameter
A001=01, the control terminal inputs determine the output frequency. At the same time, the
inverter can use multi-speed select for output frequency if one or more intelligent inputs are
configured as a CF type (CF1 to CF4). When all CF input(s) are OFF, the control terminal input
determines the output frequency normally. When one or more CF input(s) are ON, then the
corresponding multi-speed setting (see the table above) overrides and becomes the output
frequency.
When programming the multi-speed settings, be sure to press the Store key each time and then
set the next multi-speed setting. Note that when the Store key is not pressed, no data will be set.
When a multi-speed setting more than 50Hz(60Hz) is to be set, it is necessary to program the
maximum frequency A004 high enough to allow that speed.
While using the multi-speed capability, you can monitor the output frequency with monitor
function D001 during each segment of a multi-speed operation.
There are two ways to program the speeds into the registers A020 to A035:
1.
Standard keypad programming:
a.
Select each parameter A020 to A035.
b.
Press the
key to view the parameter value.
c.
Use the
and
keys to edit the value.
d.
Use the
key to save the data to memory.
2.
Programming using the CF switches:
a.
Turn the Run command OFF (Stop Mode).
b.
Turn inputs ON to select desired Multi-speed. Display the value of F001 on the digital
operator.
c.
Set the desired output frequency by pressing the
and
keys.
d.
Press the
key once to store the set frequency. When this occurs, F001 indicates the
output frequency of the selected Multi-speed.
e.
Press the
key once to confirm that the indication is the same as the set frequency.
f.
Repeat operations in 2. a) to 2. e) to set the frequency of other Multi-speeds. It can be set
also by parameters A020 to A035 in the first procedure 1. a) to 1. d).
0th
CF1
CF2
CF3
1st
2nd
6th
5th
4th
3rd
7th
Speed
Switches
Fwd Run
t
FUNC.
1
2
STR
1
2
STR
FUNC.
