Mitsubishi Electric A800 Plus Series Function Manual page 120

Tension command source selection (Pr.804)
• Selects the tension command input method in Pr.804 Tension / Torque command source selection.
• The priorities of the input signals are defined as follows. If the input method for a signal is the same as that for the input
signal with higher priority, the tension command value is regarded as "0".
Dancer signal input (Pr.363) > Actual line speed input (Pr.362) > Tension command input (Pr.804) > Line speed command
input (Pr.361 ≠ "0") > Taper setting input (Pr.1285) > Dancer tension setting input (Pr.364) > Line speed command
compensation input > Line speed command input (Pr.361 = "0")
Tension command by analog input (Pr.804 = "0")
• Input the tension command value using analog input to the terminal 1 or the terminal 6 of the FR-A8AZ. To use terminal 1,
set Pr.868 Terminal 1 function assignment = "3 or 4". To use terminal 6, set Pr.406 High resolution analog input
selection = "3 or 4".
• The tension command using analog input is calibrated with Pr.1402 to Pr.1405. When "0" is set in both Pr.1403 and
Pr.1405, the setting is invalid (line speed command value: 0).
NOTE
• When the tension command is input using analog input, the input value can be filtered using Pr.74 Input filter time constant,
Pr.826 Torque setting filter 1, and Pr.836 Torque setting filter 2.
• The maximum value of the tension command can be changed by the Pr.1401 Tension command increment setting.
Tension command by parameters (Pr.804 = "1")
• Set Pr.365 Tension command value (RAM) or Pr.366 Tension command value (RAM, EEPROM) to set the tension
command value.
• To change the tension command value frequently, write it in Pr.365. If the value is written to Pr.366 frequently, the life of the
EEPROM will be shortened.
Tension command by pulse train input (FR-A8AL) (Pr.804 = "2")
• Input the tension command value using pulse train input of the FR-A8AL.
• The tension command using pulse train input (FR-A8AL) is calibrated with Pr.1403 and Pr.1405. When "0" is set in both
Pr.1403 and Pr.1405, the setting is invalid (line speed command value: 0).
NOTE
• The maximum value of the tension command can be changed by the Pr.1401 Tension command increment setting.
Tension command value
Maximum tension
command value
Pr.1405
Pr.1403
Pr.1402
Tension command value
Maximum tension
command value
Pr.1405
Pr.1403
TENSION SENSORLESS TORQUE CONTROL
Tension sensorless torque control details
Analog
input value
Pr.1404
Pulse train
input value
400 kpps
5
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