GARD – Installation, Operation and Maintenance Manual
A l e n c o n S y s t e m s L L C - P a g e
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SHUTDOWN
: The GLID/AFD stays in the SHUTDOWN state and keeps all relays de-
energized as long the SHUTDOWN flag is set.
TESTMODE:
Upon receiving the TESTMODE command, the GARD/AFD is initialized and
initially set into SHUTDOWN state. While in TESTMODE, the user has access to the
MODBUS registers and can transfer the GLID/AFD into STANDBY, PRECHARGE, RUN
states.
Figure 9: GLID/AFD state machine
