2 mck state machine, 1 "standby" operating mode, Mck state machine – Lenze 8400 StateLine User Manual

Page 398: Standby" operating mode, 8basic drive functions (mck)

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Basic drive functions (MCK)

8.2

Internal interfaces | System block "LS_MotionControlKernel"

398

Lenze · 8400 StateLine · Reference manual · DMS 12.0 EN · 06/2014 · TD05/TD14

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8.2.2

MCK state machine

[8-2]

MCK state machine

8.2.2.1

"StandBy" operating mode

The internal "StandBy" operating mode is implicitly assumed if controller inhibit, pulse inhibit, quick

stop and/or DC-injection braking are activated. Thus, there is no setpoint generation by the Motion

Control Kernel in the "StandBy" operating mode.

• If the holding brake control sets a controller inhibit when the holding brake is closed, the

internal "StandBy" operating mode is not assumed.

• The "StandBy" operating mode cannot be activated via the MCK control word.
• When the "StandBy" operating mode is active, bits 0 ... 3 are set in the MCK status word.

Speed acceptance when the "StandBy" operating mode is quit
If the operating mode is changed from "StandBy" to "SpeedFollower", not only controller inhibit,

pulse inhibit, quick stop and/or DC-injection braking are cancelled but also the current speed is

transferred to the speed setpoint if

Flying restart function

is activated.

From version V12.00.00 onwards

, a sensitive threshold can be set in

C2611/5

. If the absolute value

of the current speed is below the sensitivity threshold, the value "0" is transferred to the speed

setpoint instead of the current speed.
In the Lenze setting "0.5 %", the sensitivity threshold corresponds to approx. 7.5 rpm at a reference

speed of 1500 rpm set in

C00011