Flow Chart For Main Control Command Bit Sequence - ABB ACS800 Firmware Manual

Fault condition/abnormal stop and restarting
After a drive fault condition or an abnormal stop, the drive can be restarted through
the controlling device by giving the following main command word bit sequence:
• Enable Bit 7 (Bit 7 = 1) to issue the fault reset command if the drive has tripped on
a fault.
• Disable Bit 3 (Bit 3 = 1 -> 0) to remove the drive start command. Else the drive will
not start, and the
• Disable Bit 0 (Bit 0 = 1 -> 0), and then enable this bit (Bit 0 = 0 -> 1) again to make
the drive ready to accept the start command.
• Enable Bit 3 (Bit 3 = 1) to issue the start command.

Flow chart for Main Control Command Bit sequence

Disable Start Cmd
Disable OFF1 Cmd
Bit 3 = 0
Bit 0 = 0
MCW Value = 1142 (476)
MSW = 4657 (1231)
Disable Start Cmd
MCW Value = 1143 (477)
MSW = 4659 (1233)
Fault Reset Cmd
Bit 7 = 1
MCW Value = 1279 ( 4FF)
MSW = 4648 (12F0)
MSW = 4664 (1238)
DRV FAULT
START HIGH (FFB3)
Enable Fieldbus
For Control
Bit 10 = 1
MCW Value = 1024 (400)
MSW = 4608 (1200)
Enable Ramp Function
Bit's 4, 5, 6 = 1
MCW Value = 1136 (470)
MSW = 4608 (1200)
Enable OFF2 Cmd
Bit 1 = 1
MCW Value = 1138 (472)
MSW = 4624 (1210)
Enable OFF3 Cmd
Bit 2 = 1
MCW Value = 1142 (476)
MSW = 4657 (1231)
Enable OFF1 Cmd
Bit 0 = 1
MCW Value = 1143 (477)
MSW = 4659 (1233)
Enable Start Cmd
Bit 3 =0 Bit 3 = 1
MCW Value = 1151 (47F)
MSW = 4919 (1337)
DRV STOP
warning will be displayed.
MCW corresponds to signal 09.06 (Main Control Word) from the
PLC. MSW corresponds to signal 03.02 (Main Status Word). The
MCW and MSW values are shown in decimal and hex values (in
brackets).
MCW Corresponds to Signal 9.06 Main Control Word from PLC
The MCW values are shown in decimal and hex values (in brackets)
End Limit activation issues an OFF3 command to the drive, and
therefore, the drive behaves in the same manner as the OFF3
MSW Corresponds to Signal 3.01 Main Status Word
The MSW values are shown in decimal and hex values (in brackets)
command when the end limits are hit. The only difference is that
the OFF3 command will get automatically enabled again when
End Limit activation issues a OFF3 Command to the drive and therefore,
the reference polarity is reversed. the drive behaves in the same manner as OFF3 command when End
limits are hit. Only difference here would be that the OFF3 Command
Fast stop activation issues a normal Stop command to the drive,
would automatically get enabled back when the reference polarity is
and therefore, the drive behaves in the same manner as the Stop
reversed.
command when the Fast stop command is issued.
Fast Stop activation issues a Normal Stop Command to the drive and
therefore, the drive behaves in the same manner as Drive Stop
Command when Fast Stop command is issued.
Enable OFF1 Cmd
Bit 0 = 1
MCW Value = 1143 (477)
MSW = 4659 (1233)
Disable Start Cmd
Disable OFF1 Cmd
Bit 3 = 0
Bit 0 = 0
MCW Value = 1142 (476)
MSW = 4657 (1231)
OFF1 STOP
DRIVE RUNNING STATE
Disable OFF1 Cmd
Disable Start Cmd
MCW Value = 1138 (472)
MSW = 4624 (1210)
Enable OFF2 Cmd
Bit 1 = 1
MCW Value = 1142 (476)
MSW = 4657 (1231)
Disable OFF1 Cmd
Disable Start Cmd
Bit 1 = 0
Bit 3 = 0
MCW Value = 1140 (474)
MSW = 4640 (1220)
Disable OFF2 Cmd Disable OFF3 Cmd
Bit 1 = 0
MCW Value = 1149 (47D) MCW Value = 1147 (47B)
MSW = 4832 (12E0) MSW = 4816 (12D0)
OFF2 STOP OFF3 STOP
Fieldbus control
255
Bit 3 = 0
Bit 0 = 0
Bit 2 = 0