5–60
MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL
CONTROL ELEMENTS
CHAPTER 5: SETPOINTS
NOTE
NOTE:
This timer should not be used with starters that inherently use Transition timers (Rev, Two-
Speed, Wye-Delta, Autotransformer Closed Transition and Autotransformer Opened
Transition).
Process interlocks
Ten independent process interlocks A through J (abbreviated as
IL A…J
on the display) are
used to provide trip, stop or alarm actions based on a contact input.
The contact input for utilized process interlocks is assigned in the contact inputs setpoints
page. The healthy state of the contact driving the input, the state wherein there is no trip,
stop or alarm action taken by the interlock, may be set to either open or closed.
Each process interlock has a startup override timer that sets the time given for the process
interlock switch to reach the healthy state (measured from the moment a start control is
received). If the input is unhealthy at the moment this timer expires, the interlock function
performs its configured action. If the startup override delay setpoint is set to zero, the
switch must be healthy for the motor to start.
Each process interlock also has a running override timer that sets the time the switch can
remain unhealthy during normal running. If the startup override timer has expired and the
switch then goes unhealthy for longer than the
IL A(J) Running Override
delay setpoint, the
interlock performs its configured action. If the
IL A(J) Running Override
is “OFF” and the
switch goes unhealthy after the startup override has expired, no action will occur.
The process interlocks may also be set such that no action is performed when the test
switch is closed. This allows the control circuit to be tested.
Figure 5-35: Process interlock timing
The following setpoints are available. The setpoints and logic for interlock A shown below
applies to all interlocks A through J.
Started
i.e.: Pre-contactor, Starting or Running
Not Started:
i.e.: Stopped, Stopping, Tripped, Locked
Out, Blocked, Starts Inhibited or Restart
In Progress
Startup Override == 0, Running Override == OFF
Healthy
Unhealthy
Startup Override == 0, Running Override == 0...3600 s
running
override
set time
running
override
set time
Action
starts inhibited
state irrelevant once started
Healthy
Unhealthy
Startup Override > 0, Running Override == OFF
startup override
set time
Action
Healthy
Unhealthy
state irrelevant after startup timeout
state irrelevant before startup timeout
Startup Override > 0, Running Override == 0...3600 s
startup override
set time
Healthy
Unhealthy
state irrelevant before startup timeout
running
override
853703A1.CDR
running
override
set time
Action
starts inhibited
Summary of Contents for Multilin MM300
Page 20: ...1 14 MM300 MOTOR MANAGEMENT SYSTEM INSTRUCTION MANUAL SPECIFICATIONS CHAPTER 1 INTRODUCTION ...
Page 184: ...6 8 MM300 MOTOR MANAGEMENT SYSTEM INSTRUCTION MANUAL COMMANDS CHAPTER 6 DIAGNOSTICS ...
Page 198: ...A 6 MM300 MOTOR MANAGEMENT SYSTEM INSTRUCTION MANUAL REPAIRS CHAPTER A APPENDIX A ...