0x6073 | 0x6873 - max current, 0x6073, 0x6873 – Lenze i700 User Manual
Page 221: Object, 7cia402 device profile
Lenze · i700 servo inverter · Reference manual · DMS 1.5 EN · 03/2014 · TD05
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7
CiA402 device profile
7.10
Cyclic sync torque mode (cst)
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0x6073 | 0x6873 - Max current
Maximum current (maximum overload current of the device)
• 100 % ≡ rated motor current (
for axis B)
• This parameter serves to limit the inverter output current.
• The value to be set here results from the maximum torque required for the process and the connected motor.
The value is calculated according to the following rule of thumb:
• For synchronous motors (SM):
Axis A: 0x6073 [%] = M
max_process
[Nm] /
[Nm] * 100
Axis B: 0x6873 [%] = M
max_process
[Nm] * 100
• For asynchronous motors (ASM):
Axis A: 0x6073 [%] = M
max_process
[Nm] /
[Nm] * 115
Axis B: 0x6873 [%] = M
max_process
[Nm] * 115
• For both motor types:
[%] = M
max_process
[Nm] /
[Nm] * 100
Axis B:
[%] = M
max_process
[Nm] * 100
• Depending on the motor frame size, the Lenze setting of 0x6073 (or 0x6873 for axis B) and
for axis B) serves to achieve a rated current of 150 % in case of synchronous motors and a rated current of 130 %
in case of asynchronous motors. If the process (application) needs torques above these limits, these two
parameters have to be set accordingly based on the motor data.
• If a value is set here which, multiplied by the rated motor current (
or
for axis B) leads to a higher
current value than the maximum device current, the value is limited device-internally to a maximum device
current / rated motor current of 100 % * and output as warning in the logbook. The value set here, however, is
not changed.
Note!
This parameter is not identical to the ultimate motor current I
ULT
for axis B!
• The ultimate motor current is a limit value for synchronous motors in order to protect their magnets.
• The value to be set here should always be considerably below the ultimate motor current!
Setting range
(min. value | unit | max. value)
Lenze setting
0.0
%
3276.7 150.0 %
Write access CINH OSC P RX TX
Scaling: 1/10
UNSIGNED_16
Example calculation based on the torque characteristics for MCS06C41 Lenze motor
The data apply to a mains voltage 3 x 400 V
M
max_process
0x6073 = M
max_process
/ M
rated_motor
* 100 % = 1.5 Nm / 0.7 Nm * 100 % = 215 %
M
rated_motor