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6–52 MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL

CONTROL ELEMENTS CHAPTER 6: SETPOINTS

Starts/Hour Limit

Range: 1 to 5 in steps of 1 or OFF

Default: OFF

This setpoint specifies the number of starts in the last 60 minutes at which count start

control is inhibited. A value of “OFF” defeats this feature.

Time Between Starts

Range: 1 to 3600 seconds in steps of 1 second, or OFF

Default: OFF

This setpoint specifies the time following a start before a start control is permitted to

prevent restart attempts in quick succession (jogging). A value of “OFF” defeats this

feature.

Restart Block Time

Range: 1 to 50000 seconds in steps of 1 second, or OFF

Default: OFF

This setpoint specifies the time following stop before a start control is permitted. A value

of “OFF” defeats this feature.

NOTE

NOTE:

This timer should not be used with starters that inherently use Transition timers (Rev, Two-

Speed, and Wye-Delta).

6.4.3 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.

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Delta MM300 Bedienerhandbuch Seite 139