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PROFIBUS-DP external communication cards
POWERXL DG1 SERIES VFD
MN040010EN—September 2016 www.eaton.com
General state machine
State diagrams are defined for the operating modes. In the
PROFIdrive control profile, the controls bits 0 to 3 perform
the basic start-up / power down functions whereas the
control bits 4 to 15 perform application-oriented control.
Figure 41. General state diagram
Notese:
STW1 bit x, y = These control word bits shall be set by the
control.
ZSW1 bit x, y = These status word bits indicate the actual
state.
Standstill detected
is an internal result of a stop operation.
a Abbr.: “p.e.” = “Pulses enabled” optional.
b The internal condition “fault with ramp stop” also
activates this transition.
Information on the general state diagram
•
The green blocks represent states, the arrows represent
transitions
•
From several states, several transitions are possible
•
The more points that a transition has, the higher is its
priority. A transition without points has the lowest priority
•
The PROFIBUS interfaces between this controller and the
DO has the control priority (PNO 928)
•
ZSW1 Bit 9 is set by the DO
•
STW1 Bit 10 is set by the controller
•
The bits defined for positioning mode are only relevant, if
the drive is in the state “S4” operation
•
All stop-reactions caused by faults (Fault with Ramp
stop, Fault with Quick stop, Fault with Coast stop) for the
general state machine to switch to state S1 (Switching on
Inhibited) or S2 (Ready For switching)
