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CHAPTER 5: SETPOINTS
MM3 MOTOR MANAGER 3 – INSTRUCTION MANUAL
together with the
STARTUP OVERRIDE DELAY
, and
OPERATION
INSTANTANEOUS ALARM
interlock features can be changed to any 20-character alphanumeric sequence.
See Interlock Names on page 5–27 for details.
• "PLANT INTERLOCK": This function provides a switch input trip feature similar to the
local isolator. When this switch is unhealthy, a plant interlock trip will occur. The
plant interlock trip is automatically cleared when the plant interlock switch goes
healthy.
• "LOCKOUT RESET": This function provides a separate reset facility for lockout trips
(i.e. overload, ground fault and stalled rotor). These trips are considered to be more
serious than other MM3 Motor Manager 3 trips. When used, this switch will reset
overload trips (regardless of lockout time), ground fault trips and stalled rotor trips
only. All other trips must be reset using the RESET key. Note that the setpoint in
PROTECTION
MOTOR PROTECTION OPTIONS
setpoint allows lockout trips to be reset using the RESET key if required.
• "SETPOINT ACCESS": This function provides security against unauthorized
changing of MM3 Motor Manager 3 setpoints. When this switch is unhealthy,
setpoints cannot be changed from the keypad; when this switch is healthy,
setpoints can be changed from the keypad. If this feature is not used then
setpoints can always be changed from the keypad.
• "AUTO PERMISSIVE": This function is used together with the "AUTO START A/B"
functions and can be further defined using the
setpoints. If the auto permissive switch is healthy, start commands
AUTO MODE
can come from the Auto Start A / Auto Start B switches. When the auto permissive
switch is unhealthy, the Auto Start A / Auto Start B switches are ignored. When the
auto permissive switch is healthy, start commands via the Start A and B switch
inputs and the faceplate are blocked. See the
setpoint descriptions for further functionality.
AUTO MODE
• "AUTO START A": This function is used in conjunction with the "AUTO PERMISSIVE"
function described above. When the auto permissive switch is healthy, the Auto
Start A switch can be used to start the motor.
• "AUTO START B": This function is used together with the "AUTO PERMISSIVE"
function. When the auto permissive switch is healthy, the Auto Start B switch can
be used to start the motor in applications where Start B is used (two-speed and
reversing starter types).
• "RESET EMERGENCY STOP TRIP": This function is used when a separate emergency
stop trip reset switch is required. When this switch is healthy and an emergency
stop trip is present, the trip will be reset.
• "RESET UNDERCURRENT TRIP": This function is used when a separate undercurrent
trip reset switch is required. When this switch is healthy and an undercurrent trip is
present, the trip will be reset.
• "TWO WIRE CONTROL": This function is used to provide a means to switch from
normal pulsed three-wire start/stop control to maintained two-wire start/stop
control. When this switch is healthy, start commands (Start A/B switch inputs; Auto
Start A/B switch inputs) must be maintained in the closed state for the MM3 Motor
Manager 3 to keep the motor running. When the start input is opened, the MM3
S3 PROCESS
,
RUNNING OVERRIDE DELAY
setpoints. The names of the process
RESET LOCKOUT USING RESET
AUTO PERMISSIVE INDICATION
AUTO PERMISSIVE INDICATION
,
S2
and
and
5–23
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