Tension Feedback Detection - Mitsubishi Electric A800 Plus Series Function Manual

Tension feedback calibration example
• The following parameters are used for calibrating the terminals which the tension feedback is input via. The tension
feedback analog input values at both 0% and 100% can be calibrated.
Input terminal
Terminal 2 (0 to 100%)
Terminal 4 (0 to 100%)
∗1
Terminal 1 (-100 to 100%)
Terminal 6 (FR-A8AZ) (-100 to 100%)
∗1
The initial input range is 20 to 100%.
• In the following example, a tension sensor in capacity from 0 to 10 V output is used for inputting the tension feedback value
through terminal 1 (input range: -10 to 10 V). This example defines the minimum tension as 0% and the maximum tension
as 100% for calibration. C13(Pr.917) Terminal 1 bias (speed) and Terminal 1 gain (speed) are used as calibration
parameters.
Tension sensor
NOTE
• For the details of C3 (Pr.902), C4 (Pr.903), C6 (Pr.904), C7 (Pr.905), C13 (Pr.917), and C15 (Pr.918), refer to the FR-A800
Instruction Manual (Detailed).
Tension feedback input filter (Pr.1227)
• Use Pr.1227 Dancer / tension sensor feedback input filter time constant to set the primary filter for the tension
feedback input value.
4.5.2

Tension feedback detection

A signal is output while the tension feedback value maintains the specified normal level.
Pr. Name
423 Dancer / tension sensor
R422 feedback detection level
Tension feedback detection (Pr.423, Y235 signal)
• The Dancer position / tension feedback detection (Y235) signal is output while the tension feedback value is within the
range set in Pr.423 Dancer / tension sensor feedback detection level around the set point.
• For the Y235 signal, set "235 (positive logic) or 335 (negative logic)" in one of Pr.190 to Pr.196 (output terminal function
selection) to assign the function to the output terminal.
Tension sensor feedback speed control details
Calibration parameter
C3 (Pr.902), C4 (Pr.903)
C6 (Pr.904), C7 (Pr.905)
C13 (Pr.917), C15 (Pr.918)
C31 (Pr.926), C33 (Pr.927)
Tension feedback
100%
0 to 10 V
Setting
Initial value
range
10% 0 to 100%
TENSION SENSOR FEEDBACK SPEED CONTROL
0 V (0%) 10 V (100%)
C13 (Pr.917) C15 (Pr.918)
Analog input value
Description
Set the scope of normal value for tension feedback.
Define the percentage of deviation with respect to the
set point.
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