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GEH-6385 Reference and Troubleshooting, 2300 V Drives Chapter 3 Paramters/Functions
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3-85
Sequencer Status
The sequencer provides drive status information that can be used by various
application functions and is also used for internal sequencing functions. The status
information is divided into 2 types:
• Drive status variables
• Sequencer status variables
Drive status variables
Drive status variables provide general information about the status of the drive (for
example, whether it is running, stopped, and so forth). These variables are used by
the toolbox and by the DDI/keypad to provide drive status information to the user.
Drive status information is provided to the LAN as well. (See LAN Signal Map.)
Variable Description
Bridge is on Bridge power is enabled.
Coast stop active
A coast stop is active in the drive, initiated either by a
normal or X-stop. (See Stopping Commands and Modes.)
No faults active No faults or alarms exist in the drive.
Quick stop active
A quick stop is active in the drive, initiated either by a
normal or X-stop. (See Stopping Commands and Modes.)
Ramp ref enabled Speed reference input to the Speed Reference Ramp is
enabled. When a stop command is initiated, Ramp ref
enabled goes False, stepping the ramp input to zero. The
Speed ref, ramped follows a linear ramp from its present
value to zero.
Ready to run
Drive is ready to run and will start if a run is requested.
(See Sequencer Permissives.)
Run ready and
fluxed
Drive is fluxed and ready to run. (See Sequencer
Permissives.)
Running The drive is running (that is, the speed regulator and
speed references are enabled).
Stopped The drive is stopped (that is, bridge power is off).
Trip fault active A Trip fault exists in the drive.
Zero speed active
The speed feedback used by the speed regulator, Speed
reg fbk, is less than the parameter, Zero speed level. Once
this condition is met, Zero speed active goes True after a
delay time set by Zero speed delay.
Parameter Description
Zero speed level The level below which the drive is considered to be at zero
speed as indicated by the variable, Zero speed active.
Zero speed delay
Once Speed reg fbk is below the Zero speed level, this
parameter specifies the time for which Zero speed active is
held off from going True.
Related diagrams
• General Sequencing #2 (GenSeq_2)