Schneider Electric K series Manual de usuario descargar pdf (Pagina 65)

PLSED309039EN PM1000 Series Power Meters

08/2010 Chapter 6 – Data Communication

NOTE:

 Most of the reserved and unavailable parameters return zero value.

 The SCADA software must support register blocks consisting of different data types (integers

and floats) to transfer of whole block.

 Each Modbus register size is 16 bits. All PM1200 readings are 32 bits. Therefore, each

PM1200 reading occupies two consecutive Modbus registers. For example, VA parameter

absolute address is 3901. It occupies both 3901 and 3902 Modbus registers.

 Address configuration: All addresses are in decimal. Some SCADA software supports

Modbus register address instead of absolute register address. In this case add 40000 to the

above address and use it. For example, VA parameter absolute address is 3901. Modbus

address can be 43901 (40000+3901).

 Phase Angle Block: Voltage phase angles (0,120,240) are hard coded (not measured).

Hence, these values are also available in communication in the absence of input signals;

however, these voltage phase angles are not available in the power meter display.

 TURBO, and Percentage of Load Blocks: These parameters can be read individually or as a

block

 TURBO block: 50 parameters maximum

 Percentage of Load block: 5 parameters maximum

 All power meters addresses should be set between 1 and 247.

 All power meters should have uniform communication settings like Baud rate, parity and stop

bit.

 Use Diagnostic mode display in the power meter to analyze the problem in communication.

 Error: u – Invalid unit ID

A – Invalid Address

c – CRC error (cyclic redundancy checking)

t – Transmitting

r – Receiving

F – Invalid function code

o – Parity, framing or overrun error

O- Buffer overflow

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Schneider Electric K series Manual de usuario Pagina 65