Mitsubishi Electric A800 Plus Series Function Manual page 69

Dancer feedback speed control details
Override compensation through terminal 2, 4, or 6 (Pr.73, Pr.406, Pr.252,
Pr.253, Pr.650)
• Use terminal 2, 4, or 6 (FR-A8AZ) for override compensation of the line speed command value.
• The terminal used for compensation is determined by the settings of Pr.73 Analog input selection, Pr.406 High
resolution analog input selection, and Pr.650 Terminal 4 input compensation selection.
Line speed command input
method
Pulse train input
Analog input
Multi-speed (NET operation (terminal))
FR-A8AX
∗3
∗1 When any function is assigned to a terminal by setting Pr.361 to Pr.364, Pr.804, or Pr.1285, the terminal cannot be used for the override
compensation signal.
∗2 Set Pr.28 Multi-speed input compensation selection = "1" to enable analog input compensation while the line speed is commanded
according to the multi-speed operation.
∗3
Set Pr.304 Digital input and analog input compensation enable/disable selection = "2, 3, 12, or 13" to enable analog input compensation
while the line speed is commanded using the FR-A8AX.
• Use Pr.252 Override bias and Pr.253 Override gain to set the override compensation amount.
NOTE
• When any function is assigned to terminal 1 using Pr.361 to Pr.364, Pr.804, or Pr.1285, the override compensation is invalid.
68
DANCER FEEDBACK SPEED CONTROL
Override
compensation signal
input terminal
∗1
Terminal 6 (FR-A8AZ)
Terminal 4
∗2
Terminal 2
Override amount (%)
1000
150
Pr.252
100
Pr.253
50
0
0 V
(0 V)
(0 mA)
Parameter setting for selecting the override
compensation input terminal
Pr.73 setting Pr.406 setting
0
4, 5, 14, 15
Other than 0
Initial value
(50% to 150%)
2.5 V 5 V
(5 V) (10 V)
(10 mA) (20 mA)
Analog input
Pr.650 setting
─
1
0