User manual

12 Functions and operations in the tension control mode
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Using an external potentiometer or external DC voltage
1.
Set the system parameter for analog input signals [SyS-1-05] to “Enable.”
Note
When a system parameter has been changed, the new parameter will become
effective after the power is cycled. If a 24 VDC power supply is used, also cycle the
24 VDC power supply.
2.
Turn the M0 input ON and M1 and M2 inputs OFF, and select operation data No. 1.
3.
Connect an external potentiometer or external DC voltage to pins 1 to 3 of the analog I/O
connector (CN6).
Refer to p.42 for details on the connection method.
4.
Set the gain.
Set the speed command value per 1 V of voltage command in the application parameter for analog speed
limit gain [APP-2-00].
Setting range: 0 to 5500 r/min
Initial value: 550 r/min
5.
Set the minimum speed.
To clamp all speed command values below a certain speed at 0 r/min, set the application parameter for
analog speed limit clamp [APP-2-01].
6.
Set the offset.
If there is even a slight margin of error in the voltage value, the speed limit value may not become
0 r/min even when the voltage command specifies 0 V (minimum value). In this case, adjust the offset
using one of the two methods described below.
Automatic adjustment
1. Set the application parameter for analog input signal automatic offset [APP-2-06] to “Enable.”
2. Input 0 V to the analog speed input terminal (pin 1 of CN6).
3. Apply the offset for analog torque input using the OPX-2A or MEXE02.
Adjustment using a parameter
1. Set the application parameter for analog input signal automatic offset [APP-2-06] to “Disable.”
2. Set the offset voltage in the application parameter for analog speed limit offset voltage [APP-2-02].
7.
Set the speed limit value using an external potentiometer or external DC voltage.
Setting example
Setting
example
Analog speed
limit gain
[APP-2-00]
Analog speed
limit clamp
[APP-2-01]
Analog speed limit offset
voltage [APP-2-02]
Description
① 550 r/min 0 r/min 0 V
The speed limit value per 1 V of voltage
command becomes 550 r/min.
② 10 r/min 0 r/min 0 V
The speed limit value per 1 V of voltage
command becomes 10 r/min.
③ 550 r/min 0 r/min 1 V
The home position of voltage command
becomes 1 V. The gain of speed limit
value is the same as in example①.
④ 550 r/min 10 r/min 0 V
If the speed limit value is set less than
10 r/min of the voltage command (less
than 1 V), the speed limit value will be
0 r/min.
Speed limit value [r/min]
5500
100
Voltage
command [V]
- 10 100
3
1
2
Speed limit value [r/min]
5500
10
Voltage
command [V]
- 10 100
4