User Manual

Chapter 7 Explanation of Functions
7 - 31
(2) Curve constant (swelling degree)
Specify the swelling degree of the acceleration curve with reference to the following graphs:
The acceleration or deceleration time may be shortened midway through the acceleration or deceleration
according to the curve pattern.
7.5.14 Frequency operation function
The frequency operation function allows you to use the result of an arithmetic operation on two frequency
commands as the actual frequency command or PID feedback data.
To use the operation result as the actual frequency command,
specify "10" for the frequency source setting (A001).
To use the operation result as the PID feedback data, specify "10" for the PV source setting (A076).
Item Function code Data Description
Operation-target frequency
selection 1 and 2
A141/A142
00 Digital operator (A020/A220)
01
Volume on the digital operator
(Valid only when NES1-OP, OPE-SR/SRmini
is connected)
02 Input via the O/OI terminal
04 Input via the Modbus communicationl
Operator selection for
frequency operation
A143
00 Addition: (A141) + (A142)
01 Subtraction: (A141) - (A142)
02 Multiplication: (A141) x (A142)
Frequency source setting A001 10 Output of operation result
PV source setting A076 10 Output of operation result
Note 1: The [1] (up) and [2] (down) keys of the digital operator are ineffective when the frequency
operation function is enabled. Also, the frequency displayed by the output frequency monitoring
(d001), Scaled output frequency monitoring (d007), or output frequency setting (F001) cannot be
changed with key operations.
Note 2: The settings of "A141" and "A142" can be the same.
Output frequency (Hz) Output frequency (Hz) Output frequency (Hz)
Tar g et
frequency
(100%)
Tar g et
frequency
(100%)
Tar g et
frequency
(100%)
Acceleration time (100%) to reach
the set output frequency
Acceleration time (100%) to reach
the set output frequency
Acceleration time (100%) to reach
the set output frequency
Time Time Time
96.9
82.4
17.6
3.1
25 50
75
10
02
10
02
99.6
93.8
35
25
50 75
10
02
87.5
68.4
64.6
65
35.4
0.39
25 50 75
10
02
31.6
12.5
6.25