Start/Stop Sequence Using Communication Bits - ABB ACS800 Firmware Manual

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Start/Stop sequence using communication bits

This section describes the sequence of the 03.01 MAIN CONTROL WORD bits used
for starting, stopping and restarting after a fault condition or an abnormal stop, when
the drive is configured in the ABB Drives communication profile. For the flow
sequence of the communication bits, see
sequence
Normal starting sequence
You can start the drive through the controlling device by giving the following main
command word bit sequence:
• Enable Bit 10 (Bit 10 = 1) to activate the fieldbus command.
• Enable Bit 4, Bit 5 and Bit 6 (Bit 4, Bit 5 and Bit 6 = 1) to activate the normal ramp
block functions.
• Enable Bit 1 (Bit 1 = 1) to deactivate the OFF2 command.
• Enable Bit 2 (Bit 2 = 1) to deactivate the OFF3 command.
• Enable Bit 0 (Bit 0 = 1) to deactivate the OFF1 command.
• Enable Bit 3 (Bit 3 = 1) to issue the start command.
Normal stopping sequence and restarting
You can stop and restart the drive through the controlling device by giving the
following main command word bit sequence:
• Disable Bit 3 (Bit 3 = 1 -> 0) to issue a stop command. Brake control must be
activated, or else the drive will stop by coasting.
• Enable Bit 3 (Bit 3 = 0 -> 1) to issue the start command.
OFF1, OFF2, OFF3 stopping sequence and restarting
You can stop and restart the drive through the controlling device by giving the
following main command word bit sequence:
• Disable Bit 0 (Bit 0 = 1 -> 0) to issue an OFF1 stop command, disable Bit 1
(Bit 1 = 1 -> 0) to issue an OFF2 stop command and Disable Bit 2 (Bit 2 = 1 -> 0)
to issue an OFF3 stop command, respectively.
• The drive can be started again only after the drive has stopped.
• To issue a start command again, disable Bit 3 (Bit 3 = 1 -> 0).
• Disable Bit 0 (Bit 0 = 1 -> 0) if the OFF2/OFF3 command was issued.
• Enable Bit 0 (Bit 0 = 0 -> 1) again if the OFF1 stop command was issued, or Bit 1
(Bit 1 = 0 -> 1) if the OFF2 stop command was issued, or Bit 2 (Bit 2 = 0 -> 1) if
the OFF3 stop command was issued.
• Enable Bit 0 (Bit 0 = 1) to make the drive ready to start.
• Enable Bit 3 (Bit 3 = 1) to issue the start command.
Fieldbus control
on page 255.
Flow chart for Main Control Command Bit