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Chapter 3 Paramters/Functions Innovation Series Medium Voltage GP Type - G Drives GEH-6385
Sequencer Permissives Sequen cer permissives are used to pr event or allow the drive to run if the perm issive
condition exists in the drive. Two types of permissives exist: internal permissives
and application permissives.
Internal permissives are internal drive con ditions that must be satisfied before the
drive will run (for example, DC bus charged m ust be True before th e drive can run.)
Application permissives allow the user to connect application speci fic permissive
logic that must be satisfied before the drive will run.
The main permissive string used by the sequencer is Ready to run. This permissive
must be True for the drive to run, and the details of th is permissive ar e displayed in
the Sequencing diagra ms in the drive.
Function inputs
Application Per missive Inputs
Parameter Description
Run permissive sel When used, this parameter selects a variable that
populates Run permissive.
When unused, Run permissive is always set to True.
Start permissive sel When used, this parameter selects a variable that
populates Start permissive when the drive is stopped.
When unused, Start permissive is always set to True
Variable Description
Run permissive If False, this permi ssive will prevent the drive from starting
or stop the drive if it is running. An alarm, Run permissive
lost, is generated when the permissive is False.
Start permissive If False, this permissive will prevent the drive from starting,
but will not stop the drive if it is running. An alarm, Start
permissive bad, is generated when the permissive is
False.
X stop active If Tru e, this permiss ive will prevent t he drive from sta rting
or will perform an X-Stop if the drive is running. A Trip
fault, Run req & xstop open, is generated when this
permissive is True, the drive is stopped, and a run is
requested.
(For more information on X stop active, please refer to
Stopping Commands and Modes.)