Ip Polling Of Serial Remotes; Ip Polling Of Two Serial Ports On One Remote - GE MDS SD Series Technical Manual
Secure, long range ip/ethernet & serial wireless transceiver
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DNP3 and IEC 104 are examples of protocols that implement push communication. Note that
both the serial and Ethernet versions of DNP3 support push communication.
IP Polling of Serial Remotes
The transceiver is ideal for use in systems employing a mix of serial and Ethernet protocols.
While many variations are possible, Figure 10 shows a typical arrangement with an Ethernet host
at the Master Unit that is polling serial-based RTUs at Remote sites.
In this example, the Host Computer is connected directly to the radio's Ethernet port and the
RTUs at the Remote sites are connected to the transceiver via the radio's
serial data ports.
COM2
The IP Payload feature, used at the Master, efficiently passes TCP/UDP payload over the air, and
eliminates the need for an external terminal server. (
may also be used for payload data if
COM1
properly configured via the menu system. See next example.)
Figure 10. IP Polling of Serial Remotes
IP Polling of Two Serial Ports on One Remote
In some cases, it is necessary to poll more than one RTU at a Remote site. Figure 11 shows an
example of such a system. Here, two RTUs are connected to each Remote transceiver, both using
the radio's serial ports —
and
.
COM1
COM2
14
SD Series Technical Manual
MDS 05-4846A01, Rev. I
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