SATEC PM180 Operation Manual - Manual (Page 16)

‎Chapter 2 Device Description Communicating with the PM180
14 PM180 Substation Automation Unit

Embedded 56K modem for communications through public
telephone
lines (MODBUS RTU/ASCII and DNP3.0
protocols).

Embedded Cellular modem for communication through public
cellular network (MODBUS/TCP and DNP3.0/TCP)

PROFIBUS DP
USB Port (standard)
A USB node port is intended for local communications with the support PAS
software. It is directly connected to your PC’s USB port using the supplied USB
cable. The USB communications does not require any settings. Just connect your PC
to the PM180 USB port and install the supplied USB driver (see
Installing the USB
Driver in Chapter 6). The USB communications is ten times faster than the serial
communications can provide at a maximum baud rate.
Ethernet Port (standard)
A 10/100Base-T Ethernet port provides a direct connection of the PM180 to a local
area network through the TCP/IP protocols. The device has two onboard TCP
servers configured for the Modbus/TCP (at TCP port 502) and DNP3.0/TCP (at TCP
port 2000) communications. The TCP servers can support up to 5 simultaneous
connections with MODBUS/TCP and DNP3.0/TCP client applications.
Connection through the Ethernet port does not require device identification. The
PM180 responds to any device address and returns the received address in the
response message.
 Note
To provide simultaneous file services for all ports, the PM180 keeps independent file pointers
for each communications port. For a TCP port, the PM180 holds separate file pointers for each
active TCP socket. The TCP server automatically closes a connection if a socket is idle for more
than 5 minutes. There is no guarantee that a new connection is established at the same socket,
so do not make any assumptions regarding the current file status when starting a new
connection from your application. Always initialize a file pointer to a record from where you
expect to begin reading a f
ile. For more information, see “File Transfer” in the PM180 MODBUS
Communications Guide.
Ethernet Port (optional)
A second Ethernet port for LAN backup is available in plug-in module. As default the
standard Ethernet port is active, if this link is down the second optional Ethernet port
will switch on automatically to provide LAN access through it. The second Ethernet
port can be either wired LAN 10/100Base T, either optical 100Base FX either
wireless IEEE 802.11 b/g.
It provides a direct connection of the PM180 to a local area network through the
TCP/IP protocols. The device has two onboard TCP servers configured for the
MODBUS/TCP (at TCP port 502) and DNP3.0/TCP (at TCP port 2000)
communications. The TCP servers can support up to 5 simultaneous connections
with MODBUS/TCP and DNP3.0/TCP client applications.
Connection through the Ethernet port does not require device identification. The
PM180 responds to any device address and returns the received address in the
response message.
Using the RDM and RGM
The Remote Display Module (RDM) or Remote Graphical Module (RGM) is
connected to the device’s COM3 port using the RS-485 two-wire connection. The
COM3 port connector has additional isolated 12VDC output terminals to power the
RDM directly from the PM180. For information on using the RDM, see Chapter 4
“
Using the RDM ”.