GE Industrial Solutions OKCV3000CN DeviceNet - Manual (Page 18)

GEl- 100343
32. HOW TO MANAGE DGFC STATE
The DGFC basically has 4 states: IDLE, READY, RUN and ALARM. In IDLE state the card is configured. In
RUN state the program
that writes/reads the drive parameters is executed. In READY state the DGFC is ready to
transition to RUN state. DGFC transitions to ALARM state when a malfunction occurs.
When mode 10 is selected (refer to the DGF manual, GEI-100339), the IDLE, READY and RUN states are
automatically managed by the DGFC. With mode 10 selected, the ALARM state is present on the DGFC only
when the communication with the master falls.
The ALARM state needs the intervention of an external source in order to be. exited. This is because the DGFC
is not able to reset the drive while it is in ALARM itself. (Parameters are exchanged with the drive only
when the card is in RUN state.)
To reset the DGFC ALARM state:
1) connect iphysical digital input of the master to a digital output of the drive. Configure this drive digital
output to be “Opt2 failure”;
2) connect iphysical digital output of the master to a digital input of the drive. Configure this drive digital
input to be “Failure Reset”;
The master program must check that the “Opt2 failure” input is at a high level and that the communication with
the slave is active to be sure that received/transmitted values are consistent (note that communication between
the DGFC and master occurs even in the ALARM state, but in the ALARM state communication be-
tween the DGFC and drive is not active). When the master detects that the DGFC is in the ALARM state
(“Opt2 failure” at low level), it must reset the DGFC by setting the “Failure Reset” output.
This is only one of several possible methods. You can, for example, reset the alarm through pressing the appro-
priate key on the drive keypad (usually this is labeled as “CANC”) instead of using the “Failure Reset” input.
Also, you can use the “OK relay” instead of the digital output. Using the keypad and the “OK relay” you can
avoid the use of the TBO card.
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HOW CONNECT THE DGFC