Use Of Communication - Siemens SICAM P38 Manual

Communication

6.1 Use of Communication

6.1 Use of Communication
RS485 port of this meter supports MODBUS-RTU communication protocol. Even parity check is the default
setting for data byte check. MODBUS-RTU communication protocol can also be configured to odd parity check
or no verification (1 or 2 stop bits can be set without check). Baud rate of communication port could any of 600
bps, 1,200 bps, 2,400 bps, 4,800 bps, 9,600 bps, 19,200 bps and 38,400 bps.
RS485 port of this product should be connected using Shield Twisted Pair. When wiring, layout of the entire
network should be considered: length and orientation of communication cable, position of upper computer,
matched resistance at network end-point, communication converter, network scalability, network coverage,
EMI, etc.
Note
1. Wiring should be conducted strictly in accordance with requirement.
2. The power meter requiring no communication temporarily should be connected to RS485 network for easy
diagnosis and test.
3. The shielding layer side of cable connected with upper computer should be reliably earthed (PGND: ground,
cubicle, cabinet, etc.) to avoid two-point or multi-point earthing.
4. Shield Twisted Pair should be used for RS485 bus cable. For two twisted pairs, different colors are recom-
mended, one color for "A" side and another color for "B" side of 485 communication port.
The RJ45 Ethernet port supports 10M/100 bits/s, device work on TCP Server mode, Modbus TCP connection
port fixed to 502.
Ethernet parameters are configured by WEB mode. Open the IE browser, enter device IP address in the
address bar (factory default 192.168.0.178), shown below login interface. Password is 88888.
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SICAM P38 P39, 3-phase Power Meter with Multi-Tariff function, User Manual
E50417-H8940-C564-4, Release Date 06.2018