KEB COMBIVERT F6 Programming Manual

Protection functions
80
© 2022 KEB Automation KG
4.4.14.4 Optimized restart time
4.4.14.4.1 Overview of necessary parameterization
In order to return the motor to "normal operation" as quickly as possible after an
error UP or error LT ready, without the need for intervention by the control, the fol-
lowing settings must be made:
• Activation auto-retry: pn83 = 1: auto retry UP / PUready
(see chapter 4.3.2.2 Automatic fault reset UP)
The auto retry (auto reset) does not generate an edge in the "enable oper-
ation" bit of the control word. An automatic return into the state "operation
enabled“ without intervention of an external control is only possible if the
value "0:state" is selected in co32 state machine properties for „enable op-
eration mode“
• Activation of reduced minimum switch-off times after auto-retry: pn85 cus-
tomer time usage 1: at auto retry. (Other settings are also possible, e.g. 3:
at auto retry + at low speed,
description see chapter 4.4.23.2 Configuration of the minimum switch-off
time)
• Activation of the reduced precharge time at auto-retry UP
Setting of pn84[2] fault supression mode Bit 2 „reduced charging“
4.4.14.4.2 Reduced ramp to optimize the start-up time
If long acceleration ramps are parameterized for the "normal" start-up of the drive,
these may be too long for the restart after a mains voltage failure.
Therefore, a separate ramp time can be programmed for this case in pn84[3] auto
retry UP acceleration [s-2].
The alternative ramp is always a linear ramp.
Index
Subidx
Id-Text
Name
Function
0x2A54
3
pn84
auto retry UP accel-
eration for [s-2]
Linear acceleration / deceleration for all directions
of rotation
The alternative ramp for optimized restart becomes active when:
• the drive is operated in velocity mode
• AutoRetry UP/PUready with time limit (pn84[1] unequal zero) was per-
formed (see 4.3.2.2 Automatic fault reset UP)
• the "Fault suppression mode" in pn84[2] is activated
• bit 3 "enable operation" and bit 0 "switch on" in the controlword remain set
or are set again during the restart time. (The test is only performed in the
slow interrupt => 6.2.21 Interrupt structure of the software)
NOTICE
Removing bit 1 "enable voltage" has no effect on resetting the
function.
After bit 1 is set again, the fast ramp is used for the first acceler-
ation after any time. However, if bit 0 or bit 3 is also set to zero
when the restart is carried out, the alternative ramp is also deac-
tivated.
This alternative ramp only applies to the first acceleration process after AutoRetry
UP/PUready.

KEB COMBIVERT F6 Specifications

General

Brand	KEB
Model	COMBIVERT F6
Category	Controller
Language	English