Priority Of Control Signals; Controller Structure For Off1 And Off3; Setpoint Value Specification - Siemens SINAMICS DCM 6RA80 Faq

Priority of control signals

Cancellation of the operating enable (terminal X177.13, bit 3 in CW) always causes
immediate Alpha W shift irrespective of the other control signals, to current reduction to
current = zero with subsequent pulse inhibit when current = zero is reached.
Operating state with a higher number (see r50000),
e.g. o11 before o10 has a higher priority
o10 ...OFF2 (voltage enable): High priority
o9 .....OFF3 (fast stop): Average priority
o7 .....OFF1 (shutdown) : Low priority
If several control signals are pending simultaneously, the command is executed with a higher
priority, e.g. if OFF2 and OFF1 are set simultaneously, command OFF2 is executed.
If a current actual value of zero cannot be reached for current reduction with Alpha W shift,
the drive never enters pulse inhibit and the "OFF" status can therefore not be reached. In
such cases, only the "immediate pulse inhibit" specification via a binector settable in p50177
can help.
The function "immediate pulse inhibit" via binector should be used with care. When applied
during active regenerative feedback operation, for example, this function causes an
overcurrent.
Note: Sequence of the control signals: Before setting the ON signal via bit 0 of the control
word (e.g. terminal X177.12), the signals for OFF2 (bit 1 CW) and OFF3 (bit 2 CW) must
have a high signal so that operating state o7 (ready to switch on) exists; only then is it
possible to switch on via OFF1 (bit 0 CW).
If operating state o8 exists (switching on inhibited), set OFF1 to enter operating state o7.

Controller structure for OFF1 and OFF3

To be able to execute OFF1 and OFF3 during current-controlled operation, the controller
structure is adapted with a switch in the software. With current-controlled slave devices, for
example, in master-slave operation or in a 12-pulse parallel connection of devices, it is
therefore important to ensure that signal OFF1 or OFF3 is not passed on to the slave devices
until the master has completed the shutdown and is no longer in the Run state.

Setpoint value specification:

p50433[C]: For selecting the connector for the setpoint prior to the ramp-function generator,
see Sheet 3113 in Section 2 of the List Manual
Setpoint channel, in p50433, if this is a CDS parameter, the source of the setpoint is entered
by entering the parameter number for the CO.
p50433[0] = 52011 (Command Data Set 0, factory setting 52011: Setpoint via CO r52011,
main setpoint via analog input, terminal X177.25/26 (see Sheet 2075 in Section 2 of the
Parameter Manual).
Switchover of the setpoint source possible by switching over the CDS.
With p50672[C] and p50671[C], the direction of rotation of the motor is specified. If both have
the value 1, the direction of rotation is determined by the polarity of the setpoint (valid for 4Q
operation, both directions of current possible, see also below). See Sheet 3135 in Section 2
of the List Manual.
Fixed setpoint: One or more fixed setpoints can be activated, Sheet 3115. Only becomes
active if the Run state exists via the OFF1 high signal (e.g. via terminal X177.12). In
p50430[0...7] (8 indices available, an individual fixed setpoint command can be used under
each index) the BO of the source is entered, which takes effect as the fixed setpoint
activation. In p50431[0...7], the CO of the setpoint is entered.
Jog setpoint: Sheet 3125. Jogging has its own ON function, as such OFF1 must have low
signal, the ON function is implemented through the Jogging signal via control word 1 or via
the BO defined by p50435[0...7]. p50436[x] defines the CO for the setpoint. When the
jogging command is canceled, the delay parameterized in p50085 is used as the delay time
for the drop-out of the main contactor, to prevent drop-out of the main contactor between
repeated jogging commands.
9