Instruction manual

65
6
NETWORK VARIABLES
6.5.16 Emergency stop command (network input SNVT_hvac_emerg
nviEmergOverride)
You can give an emergency stop command during inverter operation.
If "EMERG_SHUTDOWN" is requested during inverter operation, the inverter decelerates to a stop
independently of the operation mode.
⋅ Data acceptance timing........... At network variable receive (nv_update_occurs event)
Data Name Initial Value Range Description
nviEmergOverride H0
H0
EMERG_NORMAL
Emergency stop cancel
H4
EMERG_SHUTDOWN
Emergency stop
HFF
EMERG_NUL
Invalid (no operation)
(1) Emergency Stop (2) Emergency Stop Cancel
⋅ The deceleration time depends on the Pr. 8, Pr. 44 and
other settings.
⋅ When the inverter starts decelerating under the
emergency stop command, " " appears in the
display section of the operation panel and the inverter is
put in an emergency stop status.
⋅ An emergency stop status cannot be canceled unless
emergency stop cancel operation is performed.
⋅ During occurrence of a communication line error, an
emergency stop command is not accepted.
⋅ During an inverter stop, an emergency stop command is
invalid.
⋅ During an inverter stop, turn OFF all start commands
(forward rotation command, reverse rotation command)
and request "EMERG_NORMAL".
When the inverter recognizes this status, it cancels the
emergency stop and also " " shown in the display
section disappears.
⋅ During deceleration made under an emergency stop
command, performing emergency stop cancel operation
will not cancel an emergency stop immediately. Perform
emergency stop cancel operation during an inverter
stop.