Rockwell Automation MV SMC Flex Motor Controller (for Series K or later) User Manual
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Rockwell Automation Publication 1560E-UM051F-EN-P - June 2013
Appendix C
1560E and 1562E Relay Control
If the motor has started, the unit is in the bypass mode, and a trip occurs within
the SMC Flex module or from an external protection relay, AUX4 will open the
line contactor immediately. “AUX1” will remain closed for 10 seconds to protect
the power electronics from any voltage transients due to opening the motor
circuits. A trip due to an overload or fault condition will result in a “coast” stop.
Bulletin 1562E • DPI Control – Controlled Start only
allows the MV SMC Flex to be
controlled using DPI (Drive Programming Interface). (Refer to
for Logic Command Word bits assignment for DPI control). This
special usage of DPI includes provisions for a “Local” mode of control as well.
With the Local-Off-Remote selector switch in the “Remote” position, terminal
18 of the SMC Flex module is energized, allowing a start command to be
executed via DPI. The “Aux #4” contact closes, energizing “MC”, which closes
the main contactor.
When the motor approaches rated speed, the SMC Flex module closes “Aux #1”
contact, energizing “BC”, which closes the bypass contactor.
To run in “Local” mode, the “CR” contact is used to initiate a start sequence
(similar to
)
A stop command can be generated via DPI or by opening “CR”, depending on the
control mode.
If the motor has started, the unit is in the bypass mode, and a trip occurs within
the SMC Flex module or from an external protection relay, AUX4 will open the
line contactor immediately. “AUX1” will remain closed for 10 seconds to protect
the power electronics from any voltage transients due to opening the motor
circuits. A trip due to an overload or fault condition will result in a “coast” stop.
Bulletin 1562E • DPI Control – With Controlled Stop
allows the MV SMC Flex to be
controlled using DPI (Drive Programming Interface). (Refer to
for Logic Command Word bits assignment for DPI control). This
special usage of DPI includes provisions for a “Local” mode of control as well.
With the Local-Off-Remote selector switch in the “Remote” position, terminal
18 of the SMC Flex module is energized, allowing start and stop maneuvers to be
executed via DPI. When a “Start” is executed, the “Aux #4” contact closes,
energizing “MC”, which closes the main contactor.
When the motor approaches rated speed, the SMC Flex module closes “Aux #1”,
energizing “BC”, which closes the bypass contactor. When a “Stop” is executed,
the unit opens “Aux #1”, which drops the “BC” relay and opens the bypass