Schneider Electric K series Bedienungsanleitung PDF herunterladen (Seite 49)

PLSED309039EN PM1000 Series Power Meters

08/2010 Chapter 6 – Data Communication

 If the power meter is the last device on the daisy chain, terminate it with

the terminator provided.

 See ―Table 6-1‖ on page 48, for the maximum daisy-chain communications

distances for 2-wire devices.

 The terminal’s voltage and current ratings are compliant with the

requirements of the EIA RS 485 communications standard.

Data Formats and Settings

Your SCADA software must be configured for Modbus RTU communication,

before integrating the Schneider Electric PM1200 power meter.

The mode of transmission is defined in the following which is compatible

with Modbus RTU Mode:

Table 6-2: Power meter communication and protocol settings

Power meter communication settings

Protocol

Modbus RTU

Data bits

Baud rate

9600 Baud, User set 1200 to 19200

Range:1200, 2400, 4800, 9600, 19200

Normal use: 9600 Baud

Noisy, EMI, RFI, long data cable: 4800/2400 Baud

Short cable (<300 meters or 975 feet): 19200 Baud

Parity

Even

Device Address

Stop bit

Modbus Protocol

Device Address

1 to 247

Upto 247 meters per COM port with repeaters

Function Code

03 (Read)

Data Address

Refer to ‖Data address‖ on page 53 for more information

Data type

32-bit float (real) :

 All parameters.

 Direct reading, little endian float, no scaling required

32-bit unsigned integer :

 INTR (number of interruptions (outages) - RMS Blocks)

 RunSec (Run seconds – Integ Block)

No of Registers

2 to 50 (optional) per PM1200 data block of 10 x 32 bit values must

be configured to suit the power meter

NOTE: The polling interval to poll the data from PM1200 will depend on baud rate. We

recommend polling interval of one second at 9600 Baud rate.

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 80 81

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