32 Screen Page "PROFIBUS instrument control"
On this screen page the bit states are displayed for the control word (STW) and the status word (ZSW). The
instrument state that is given by the status word is made visible in the state machine. The present state is
shown in black, all other states are shown in gray. In addition, the previous state is indicated by accentuation of
the number for the corresponding arrow symbol.
The following table describes the instrument states and the transitions.
States of the state machine
Not ready for switch-on
Amplifier is not ready for switch-on. No operation readiness (BTB) is signaled
from the amplifier software.
Switch-on inhibited
Amplifier is ready for switch-on. Parameters can be transferred, DC-link
(DC-bus) can be switched on, motion functions cannot be carried out yet.
Ready for switch-on
DC-link voltage must be applied. Parameters can be transferred, motion
functions cannot be carried out yet.
Ready for operation
DC-link voltage must be switched on. Parameters can be transferred, motion
functions cannot be carried out yet. Output stage is switched on (enabled).
Operation enabled No error present. Output stage is switched on, motion functions are enabled.
Fast stop activated
Drive has been stopped, using the emergency stop ramp. Output stage is
switched on (enabled), motion functions are enabled.
Error response active/error
If an instrument error occurs, the Amplifier changes to the instrument state
"Error response active". In this state, the power stage is switched off
immediately. After this error response has taken place, it changes to the state
"Error". This state can only be terminated by the bit-command "Error-reset".
To do this, the cause of the error must have been removed (see ASCII
command ERRCODE).
88 Setup Software
Screen Page "PROFIBUS instrument control" 07/03 BECKHOFF
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