SATEC PM174 Quick Start - Manual (Page 9)

Setting the Communications
You communicate with the meter via a changeable COM1 communication port, or through
a second factory set serial RS-485/RS-422 COM2 port. Depending on what was ordered,
your meter’s COM1 port can be equipped with an RS-232/RS-422/RS-485 serial
interface, with a dial-up modem for communicating through public telephone lines, with
an Ethernet module for communicating through the Internet, or with Profibus DP.
To configure your communications with the PM174 from PAS software:
1. Select Configuration from the Tools menu. Under the Communication group on
the Instrument Setup tab, select the type of a connection for your device.
2. Set the device communication address you assigned to the PM174.
3. In the Sampling Rate box, select a rate at which PAS updates data on your
screen when you continuously poll the device in the PAS Data Monitor.
The communication protocol and port settings in PAS must match the settings made in
your device.
The tables below show the available options. The asterisk * shows the default settings.
COM1 settings
Code Parameter Options Description
Prot Communications protocol ASCII, rtu*, dnP3, PrFb
ASCII, MODBUS RTU, DNP3.0 or PROFIBUS DP
protocol
rS Port Interface, depend on order
232 = RS-232
485 = RS-485
422 = RS-422
dial = Dial-up Modem
Eth.= Ethernet
PrFb = Profibus DP
For non-serial interfaces this is not changeable, it is
automatically detected by the meter
Addr Device Address
MODBUS: 1* -247,
DNP3.0: 0 –255 (1*)
PROFIBUS DP: 0 – 126*
bAud Baud rate 300 - 115200 bps (19200*)
dAtA Data format
7E, 8E (7/8 bits, even parity), 8N* (8 bits, no parity)
7E data format should not be used with the MODBUS RTU and DNP3 protocols
H.Sh Handshaking (flow control) nonE*=no flow control
SOFt=software (XON/XOFF)
HArd=hardware (CTS)
rtS RTS mode nonE* = not used
Forc = RTS is permanently asserted
CtrL = RTS is asserted during the transmission
COM2 settings
Code Parameter Options Description
Prot Communications protocol
Rtu* = MODBUS RTU
ASCII = MODBUS ASCII
dnP3 = DNP3
The communications protocol supported by the port
rS Port Interface
485* = RS-485
422 = RS-422
Addr Address
MODBUS: 1*-247
DNP3: 0–65532 (1*)
Device network address
bAud Baud rate 300-115200 bps (19200*) The port baud rate
dAtA Data format and parity 7E, 8N*, 8E
7E data format should not be used with the Modbus
RTU and DNP3 protocols
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