User's Guide

PAGE 10
Modbus Interface – Modbus TCP (Transmission Control Protocol) is the Modbus RTU
protocol with a TCP interface that runs on Ethernet. Monnit provides the Modbus TCP
interface for you to pull gateway and sensor data. You can use Modbus without the server
interface active. The data will not be sent to a server, but you can continue to poll for new
data as it is received by the gateway.
SNTP Interface – SNTP is a synchronized
computer clock on a network. An SNTP server can
be set up on the same LAN as the gateway, such
as on a router or a Linux computer. The gateway
should be configured to retrieve time from only
trusted servers, such as ones maintained by your
ISP. Incorrect time can affect the delivery of sensor
traffic.
If the Monnit Server is active, it will be utilized for
time synchronization in ordinary operation. So SNTP
will be used as a backup If you disable the default
server interface, you must configure the SNTP
Interface.
HTTP Interface – The HTTP Interface allows you to set how long you wish the local interface
to be active before being automatically disabled. For increased Security, your choices are
to have the local HTTP interface disabled after 1 minute, 5 minutes, 30 minutes, or always
active. See the next section for more on the local interface.