Parker AC890PX Series, Engineering Reference

Page: 178 / 460

B-4
A p p e n d i x B : S e q u e n c i n g L o g i c
AC890PX AC Drive
Transition of States
The transition matrix describes what causes the transition from one state to another, for example see number 4 below: the
transition from “Ready To Switch On” to “Trip Active” is triggered by “TRIP” going TRUE. Note – where a state has more
than one exit transition, the transition with the lowest number has priority.
Refer to the following table and state diagram.
Current State Next State Cause (FALSE to TRUE)
1 Power Up
Switch On
Disabled
Power-Up, Restore Configuration or exit from Configuration
mode.
2 Switch On Disabled Trip Active Trip
3 Switch On Disabled Ready To
Switch On
RUN = FALSE, JOG = FALSE, NOT FAST STOP = TRUE and
NOT COAST STOP = TRUE
4 Ready To Switch On Trip Active Trip
5 Ready To Switch On
Switch On
Disabled
NOT COAST STOP = FALSE or NOT FAST STOP = FALSE
6 Ready To Switch On Switched On RUN = TRUE or JOG = TRUE
7 Switched On Trip Active
Trip (includes CONTACTOR CLOSED = FALSE after 10
seconds)
8 Switched On
Switch On
Disabled
NOT COAST STOP = FALSE or NOT FAST STOP = FALSE
9 Switched On
Ready To
Switch On
RUN = FALSE and JOG = FALSE
10 Switched On Ready CONTACTOR CLOSED = TRUE and defluxed
11 Ready Trip Active Trip (includes CONTACTOR CLOSED = FALSE)