Rockwell-automation 1402-LSM Line Synchronization Module Installation Manual do Utilizador descarregar pdf (Página 41)

Chapter 4

Application Information

4–7

Discrete Inputs to the PLC–5 Continued

The Lower Speed – Frequency Adjust synchronization error discrete input to

the PLC–5 indicates that the Synchronizing Bus is producing voltage at a

frequency higher than that of the Reference Bus.

The Raise Speed – Phase Adjust synchronization error discrete input to the

PLC–5 indicates that the Synchronizing Bus is producing a voltage which is

between 0 and 180 degrees behind the Reference Bus.

Reference Bus V

oltage

Synchronizing Bus Voltage

Figure

4.1

The Lower Speed – Phase Adjust synchronization error discrete input to the

PLC–5 indicates that the Synchronizing Bus is producing a voltage which is

between 0 and 180 degrees ahead of the Reference Bus .

Reference Bus V

oltage

Synchronizing Bus Voltage

Figure

4.2

ATTENTION: If the Synchronization Bus and the Reference

Bus are moving towards synchronization, the discrete inputs to

the PLC–5 for Phase Adjust will not be asserted.

The Raise Power– Load Share Adjust discrete input to the PLC–5 indicates

the prime mover is not producing enough power. The RPM must be

increased.

The Reduce Power–Load Share Adjust discrete input to the PLC–5 indicates

the prime mover is producing an excess of power. The RPM must be

decreased.

Int

erf

acing

LSM

ontinu

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Rockwell-automation 1402-LSM Line Synchronization Module Installation Manual do Utilizador Página 41