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Serial Communications Setup ION 7500 / ION 7600 User’s Guide
Page 38 Chapter 2 - Using The Front Panel
Serial Communications Setup
The current configuration of COM1 (RS-232 or RS-485), COM2 (RS-485), and
COM3 (optical port or internal modem) are found in the COM Setup menu items.
Ethernet settings are located under Network Setup. Depending on
communications ports ordered with your meter, the parameters that you can setup
for COM1, COM2, and COM3 are as follows:
1
Connect to IP service port 7701 for Modbus RTU communications over Ethernet. The Modbus Unit ID
of the meter over Ethernet is 100.
2
See the technical note
Time Synchronization and Timekeeping
for details about GPS.
3
IEC870-102, EtherGate and ModemGate are only available on COM1 and COM2.
4
This setting only applies if you have ordered the internal modem option (see below).
5
The factory set Unit ID for COM1 is based on the serial number of the meter, using the last four
numbers before the dash. For example, if the serial number is PA-0009B263-01, the Unit ID is set in
the factory to 9263. After a factory reset, the unit ID number will default to 100.
NOTE
The Factory Protocol is reserved for the use by Power Measurement Technical Services. Contact Technical
Services if you require more information.
Internal Modem Setup
If you have the internal modem order option, you disable the IrDA optical port on
COM3 by selecting
MODEM for the Mode setting. The modem is factory configured
to answer in the number of rings specified by Answer HR Rings (the Non-Answer
HR Rings value is ignored by default).
A list of compatible AT commands is provided on the website and the technical
note Modem AT Commands for ION Meters. Visit the web site for the latest modem
configuration files.
COM Port Setting Options Default
Protocol
ION, Modbus RTU
1
, Modbus Master, DNP 3.00, GPS Arbiter
2
, GPS:Arbiter-Vorne
2
,
GPS:TrueTime/Datum
2
, Factory, IEC870-102
3
, EtherGate
3
, and ModemGate
3
.
all ports: ION
Baud Rate 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200 bps 9600 bps
Tran Delay Transmit delay - the bounds are 0.0 to 1.0 s. 0.01s (10ms)
Unit ID
Sets the meter’s Unit ID;
a unique Unit ID is required for each device on a serial network.
COM1: Unit ID is
based on the serial
number.
5
COM2: 101
COM3: 102
Mode
(COM1 and COM3)
The communications mode selected
COM1:RS-232 or RS-485
COM3: IrDA or Modem (internal)
COM1: RS-232
COM3: Modem
Flow Control
(COM1 only)
‘RTS/CTS’ or ‘RTS with Delay’ ‘RTS with Delay’
Modem
4
(COM3 only)
Answer HR Rings– The number of rings during defined answer hours. Valid entries for
this register are 0-255 rings; an entry of 0 rings will disable answering
1
Non-Answer HR Rings– The number of rings during defined non-answer hours. 5