Siemens MCC-3298 Password Protection, Using the Reset/Test Push Button, Performing a Lamp Test

3 Operating the SAMMS-LV Device

3 Operating the SAMMS-LV Device

This section explains how to operate the SAMMS-LV device. Operation of the device requires that the unit have control power (12VAC) applied to terminals 5-6. Most operations also require use of the Hand-Held Communicator (HHC). Use of the HHC is described in detail in section 3.27.

3.1 Password Protection

Changing the settings of the SAMMS-LV device requires the use of the Hand-Held Communicator (HHC) in the program mode. To access the program mode, the user needs a password. The SAMMS-LV device is shipped from the factory with the password “0000.” This password can be changed by the user as described in section 3.28.1. Display of data using the HHC does not require use of a password.

3.2 Using the Reset/Test Push Button

The Reset/Test pushbutton is located at the bottom center of the front panel of the SAMMS-LV device as illustrated in Figure

3.1.You press this pushbutton to manually reset the SAMMS-LV device after a fault or a trip condition occurs so that the motor can be restarted. You can also use the Reset/Test pushbutton to perform a lamp test or an overload relay test.

3.2.1 Performing a Lamp Test

To test the diagnostic LEDs, the control LEDs and the light bars on the front panel, use the following procedure:

1.Press and hold the Reset/Test pushbutton for one to two seconds.

2.Release the Reset/Test pushbutton. (All LEDs and light bars on the front panel illuminate for two seconds.)

If a fault or trip condition exists when you press the Reset/Test pushbutton, the device performs a reset instead of a lamp test.

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Figure 3.1 Front view of SAMMS-LV

3.2.2 Performing an Overload Relay Test

You may perform an overload relay test whenever the motor is stopped. Use the following procedure to perform an overload relay test.

1.Press and hold the Reset/Test pushbutton for at least the duration of the class time. The class time is set by accessing function F7. If you need to know how to access function F7, see Section 3.28. If you release the Reset/Test pushbutton before the duration of the class time, the device performs a lamp test. If a fault or trip condition exists when you press the Reset/Test pushbutton, the device performs a reset instead of a lamp test.

2.Continue to hold down the Reset/Test pushbutton. After reaching the class time duration, the Impending Trip and the Phase Unbalance LEDs illuminate.

3.Release the Reset/Test pushbutton. The Impending Trip and Phase Unbalance LEDs go off, and the Overload Trip LED illuminates for two seconds. If the SAMMS-LV device is tripped, it is automatically reset at the end of the overload relay test.

Note that this test checks the electronic circuitry, but does not replace a test in which actual power current is passed through the primary circuit.

Use the following procedure to reset the SAMMS-LV device after a trip event.

1.Press the Reset/Test pushbutton.

2.Release the Reset/Test pushbutton. The device resets the alarm LEDs. If the motor has cooled sufficiently, you can restart the motor.

3.3 Motor Control

You can configure the SAMMS-LV device to perform many motor starting and control functions. These functions include basic across-the-line, to more complicated reversing, two- speed, and reduced-voltage starting. The SAMMS-LV device stores in its memory the executable code representing the ladder diagram for the user’s control application. The SAMMS-LV device and ladder diagram code replace the conventional control logic defined by wired interconnection of electrome- chanical timers, control relays, pushbuttons, selector switches, and pilot lights. A library of over 70 standard ladder diagrams available for the SAMMS-LV device covers most applications. In addition to the standard ladders, you can construct custom ladder diagrams, using optional software, to handle special applications.

Figures 3.2 and 3.3 illustrate the ladder symbols representing input and output devices available for the SAMMS-LV device. The circular symbols represent output devices such as contactor coil drivers, pilot LEDs on the front panel of the SAMMS-LV device, software time-delay relays and software control relays. All other symbols represent input devices such as software auxiliary contacts, remote AC inputs, front-panel pushbuttons, and software timer instantaneous and timed contacts.

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