Omron VARISPEED G7 -, Инструкция по эксплуатации

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Fig 6.64 Torque Control Block Diagram
Speed Limiter and Priority Circuit (Speed Limit Function)
If the external torque reference and load are not balanced during torque control, the motor will accelerate in
either the forward or reverse direction. The speed limit function is used to limit the speed to a specified value
and it consists of the speed limiter circuit and priority circuit. The speed limit circuit
Application Precautions
There are two ways to set a speed limit: using an input from an analog input terminal and setting a speed limit
in d5-04. The inputs methods for a speed limit are listed in the following table.
Speed Limit Input Method
Location of Refer-
ence
Constant Set-
tings
Remarks
Voltage input (0 to ±10 V)
Set in d5-04 d5-03 = 2 -
Between A1 and AC
b1-01 = 1
H3-01 = 1
Set H3-01 to 0 if the speed limit is always
to be positive.
Between A2 and AC
b1-01 = 0
H3-08 = 1
H3-09 = 1
The value will be added to the value input
on A1 to determine the speed limit.
Set H3-03 to 0 if the speed limit input on
A2 is always to be positive.
Turn OFF (V side) pin 2 of DIP switch S1
on the terminal board.
Current input (4 to 20 mA) Between A2 and AC
b1-01 = 0
H3-08 = 2
H3-09 = 1
The value will be added to the value input
on A1 to determine the speed limit.
Turn ON (I side) pin 2 of DIP switch S1
on the terminal board.
Option Card (AI-4B)
(0 to ±10 V)
Between TC1 and TC4
b1-01 = 3
F2-01 = 0
If H3-09 is set to 0, the sum of the input
between TC2 and TC4 will be added the
input between TC1 and TC4 to determine
the speed limit.
Torque reference
from analog input Torque primary delay
filter
d5-02
Torque compensation
from analog input
Speed limit from analog
input from terminal A1
Speed limit
d5-04
1
2
d5-03
Speed limiter
Speed feedback
Speed limit bias
d5-05
+
Torque limit
Internal torque
reference
Refer to torque limit setting
via constants and analog input
Speed controller
(ASR)
Priority
circuit
+
+
+
−