Setting Do Parameters - Huawei SmartLogger1000 User Manual

SmartLogger1000
User Manual
When the PV plant and the element management system (EMS) are not in the same area, the
SmartLogger needs to be connected to the EMS to implement the function of monitoring a
remote PV plant. After you connect the SmartLogger to a router and set the Ethernet
parameters, the SmartLogger can be connected to the remote EMS, SMTP mail server, or FTP
server through the router.
If it is inconvenient to connect the PV plant in wired mode, you can connect it to a wireless
3G router for accessing the Internet, as shown in .
Figure 7-64 3G router networking
A 3G router is a communication device for civil use. Its reliability is limited. You can connect
the DC power supply cable of a 3G router to the SmartLogger. This allows the SmartLogger
to control the reset of the 3G router when the communication link is interrupted, improving
the reliability of the communication link.

7.28.1 Setting DO Parameters

This topic describes how to set DO configuration parameters for resetting an external 3G
router over the WebUI.
Context
The SmartLogger provides three DO ports. You can connect one DC power cable of the 3G
router to one DO port in series and power on or off the wireless module by disconnecting or
connecting the DO dry contact to control the reset of the 3G router.
Considering the restrictions on the current that can pass the DO port of the SmartLogger, you
need to determine the number of DO ports to be used for the control based on the maximum
power supply current of the 3G router (the maximum power supply current can be calculated
based on the maximum power consumption and DC power supply voltage).
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Issue 04 (2013-12-15)
When the power supply current is smaller than 1 A, use one DO port.
When the power supply current is larger than 1 A but smaller than 1.6 A, use two DO
ports.
When the power supply current is larger than 1.6 A but smaller than 2.4 A, use three DO
ports.
When the power supply current is larger than 2.4 A, access is not allowed because the
current exceeds the upper limit.
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