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 4 to 6 of the analog I/O
connector (CN6).
Refer to p.42 for details on the connection method.
4.
Set the gain.
Set the tension command value per 1 V of voltage command in the application parameter for analog
tension command gain [APP-2-04].
Setting range: 0 to 100%
Initial value: 10%
5.
Set the offset.
If there is even a slight margin of error in the voltage value, the tension command value may not
become 0% 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 torque input terminal (pin 5 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 tension command offset voltage
[APP-2-05].
6.
Set the tension command value using an external potentiometer or external DC voltage.
Setting example
Setting
example
Analog tension command
gain [APP-2-04].
Analog tension command
offset voltage [APP-2-05].
Description
① 10% 0 V
The tension command value per 1 V of voltage
command becomes 10%.
② 1% 0 V
The tension command value per 1 V of voltage
command becomes 1%.
③ 100% 0 V
The tension command value per 1 V of voltage
command becomes 100%.
④ 10% 1 V
The home position of voltage command becomes 1 V.
The gain on tension command value is the same as
in example①.
Tension command value [%]
100
10
Voltage command [V]
- 1 - 10
110
- 10
- 100
4
1
3
2