ABB MD21 User Manual

• Emergency stop
This input is used for the emergency stop device.
When the input is active, the motor will be
stopped/tripped and cannot be restarted until
the input is inactive. This function is used
together with OPERATION parameters.
OPERATION: This parameter
determines whether the emergency
stop feature is a trip (reset required in
order to restart the motor) or a stop
(no reset required).
Emergency stop function is not used
for functional safety.
• PLC control 1 & PLC control 2
'PLC control 1' & 'PLC control 2' determine jogging
control through the digital input. When DI detects
an active signal, the motor will run continuously
on one direction or at one speed until the inactive
signal in detected to stop the motor.
'PLC control 1' is designed for start/stop forward
control (CW) or first speed control in two speed
starters.
'PLC control 2' is designed for start/stop reverse
control (CCW) or second speed control in two
speed starters.
To enabled PLC control function (jogging
control), local control access has to be enabled.
• Trip reset
The input is used to reset a trip. This input works
in edge triggering mode.
• Torque switch
This input is used to check the status of torque
switch used for actuator starter. When the input
is different from normal state, M10x will release
all contactor control relays to stop the motor. This
input works in level check mode.
• F_CA
The F_CA input is the feedback detection signal
of contactor control relay CCA. This input works
in level check mode.
• F_CB
The F_CB input is the feedback detection signal
of contactor control relay CCB. This input works
in level check mode.
• F_CC
The F_CC input is the feedback detection signal
of contactor control relay CCC. This input works
in level check mode.
• Loc/R
The Loc/R input is local/remote control switch
input.
Once the DI is assigned as loc/R function, a local
selector switch function is activated. The local se-
lector switch has the highest privilege to assign
control access.
This input works in level check mode.
• Main Switch Supervision
When ‘main switch status‘ input is selected, main
switch protection function will be enabled. Refer
to the description of main switch protection
function.
This input works in level check mode.
• External trip
The input is used for tripping motor from external
triggers. For example, a trip signal from short
circuit protection device. The input requires to be
reset after external trip, either from local or from
remote. The input works on level trigger, i.e.
continuous '0" or "1".
In feeder mode, ‘External trip’ function
only occurs a message and details refer
to ‘Feeder’ chapter on page 38.
66 M O T O R CO N T R O L A N D P R OT E C TI O N U N I T M 10 X US ER G U I D E

ABB MD21 Specifications

General

Brand	ABB
Model	MD21
Category	Control Unit
Language	English