16.8
Open loop operation (operation without encoder)
Information
Restrictions during open loop operation:
•
no distance dependent deceleration
•
no arch-travel
•
possibly higher heating of the motor
•
worse positioning accuracy than with Closed-Loop-operation
•
worse travel confort than with Closed-Loop-operation
•
maximum travel speed: 1,0 m/s
16.8.1
Activate operating mode for open loop operation
To be able to commission a motor without an encoder, the operating mode has to be activated before.
Encoder & BC
|
-
"
ENC_TYP No Enc.
|
-
"
No Enc.
Encoder type
Adjust the parameter
"ENC_TYP=No Enc."
in the menu
"Encoder & BC"
Further procedure is identical to commissioning for operation with an encoder. This is described in the
section entitled "Commissioning".
16.8.2
Parameters for open loop operation
For open loop operation, additional parameters for optimising travel performance are available in the
Control
menu.
The parameters are visible only when open loop operation is active.
If it is necessary to change parameters, the parameter
Controller/UF_ED=manually
must be
entered.
Parameter
Description
Value range
Factory set-
ting
C_MOD
Controller Mode
Selecting the operating mode of the ZETADYN 4
FOC:
Operation with encoder (Closed-Loop)
U/f:
Operation without encoder (Open Loop)
FOC
U/f
FOC
UF_ED
U/f-Edit-mode
Enabling the additional parameters with Open-Loop-operation
(U/f)
On
Off
Off
V_0
Minimum travel speed at start
The setpoint for V_0 will be activated before the brake opens
0 ... 0.2 m/s
autom. precon-
fi
guration
V_STOP
Minimum travel speed at stop
The brake will be closed when the V_STOP is reached
0 ... 0.2 m/s
autom. precon-
fi
guration
I_Kipp
Tilting protection: If the entered limit value is exceeded, the set
value for the speed will be reduced.
0 ... 90 A
autom. precon-
fi
guration
U0
Voltage at speed 0 of the frequence dependent voltage charac-
teristic
0 ... 460 V
autom. precon-
fi
guration
U1
Start voltage of the frequency dependent voltage characteristic
0 ... 460 V
autom. precon-
fi
guration
U2
Corner voltage of the frequency dependent voltage character-
istic
0 ... 460 V
autom. precon-
fi
guration
f1
Start frequency of the frequency dependent voltage character-
istic
0 ... 125 Hz
autom. precon-
fi
guration
f2
Corner frequency of the frequency dependent voltage character-
istic
0 ... 125 Hz
autom. precon-
fi
guration
s_FIL
Filter for measuring motor current for the slip compensation
0 ... 400 ms
autom. precon-
fi
guration
s_COMP
Operation with slip-compensation
On:
Slip-compensation is activated
Off:
Slip-compensation is deactivated
On
Off
Off
Translation of the original operating instructions
ZETADYN 4C
Special functions
R-TBA12_01-GB 1415
Part.-No. 00163371-GB
171/204
1
6
Special
functions
Содержание ZETADYN 4C
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