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Connecting the SmartLogger to a Power Meter
This topic describes how to connect the SmartLogger to a power meter.
Context
The SmartLogger can be connected to a power meter that supports the standard Modbus-RTU or DL/T645 protocol.
- The SmartLogger can be connected to and manage only one power meter that supports the Modbus-RTU protocol.
- The SmartLogger can be connected to and manage multiple power meters that support the DL/T645 protocol.
The protocol points for Power Meters provided by different vendors are varied. Therefore, to obtain information from a Power Meter, configure the protocol point on the WebUI of the SmartLogger properly based on the document delivered by the vendor.
For details about the definition of the RS485 communications cables for the Power Meter, see the operation manual delivered with the Power Meter.
There are three RS485 ports in the SmartLogger. For details about the port descriptions, see Context in Connecting the SmartLogger to the SUN2000.
Figure 4-26 shows how to connect the SmartLogger to the Power
Meter.
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A Power Meter is typically installed indoors,
and can be connected to the COM port of the SmartLogger without an
RS485 signal SPD.
Procedure
- Connect one end of the cable delivered with the power meter to the RS485 port of the Power Meter.
- Connect the other end of the cable to the COM port of the
SmartLogger. For details, see 1–4 in Procedure in Connecting the RS485 Signal SPD.
Connect the RS485+ port of the Power Meter to the COM+ port of the SmartLogger and the RS485- port of the Power Meter to the COM- port of the SmartLogger.
- After connecting the cable for a power meter that supports the Modbus-RTU protocol, log in to the embedded WebUI and set relevant parameters for the Modbus power meter. For details, see Setting Power Meter Parameters.
- Devices connected to a COM port of the SmartLogger must support the same protocol. After connecting the cable, modify the COM port protocol on the LCD or WebUI. For details, see Setting Communications Parameters or Setting RS485 Parameters.
- The power meter cannot be detected automatically. You need to add this device manually on the LCD or WebUI. For details about this operation, see Managing Devices or Connecting Devices.
