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Communications Setup
 ION 7500 / ION 7600 User’s Guide
Page 52
Chapter 3 - Default Meter Functionality 
1
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.
2
If you have the internal modem order option, the modem shares COM3 with the IRDA optical port. 
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). The modem initialization string (
Modem Init
) can 
only be altered via software communications.
Refer to the online ION Programmer’s Reference for complete details about all the 
setup registers in the Communications module.
Modem Initialization String
The setup register labeled ModemInit is available for ION 7500 and ION 7600 
meters with internal modems, and defines the initialization string for the internal 
modem (by default, the modem is factory configured to answer on one ring). You 
should not require changes to the ModemInit string for normal operation. If you 
require advanced modem functionality, you can customize the ModemInit register 
with a string up to 47 characters long.
Refer to the Modem AT Commands technical note for information regarding your 
internal modem, including details on customizing the modem’s registers.
N
OTE
The ModemInit string is automatically sent to the internal modem when the 
ModemInit
 setup register is
changed, when the meter is powered up, and when the baud rate of the modem’s Communications
module is changed.
Communications Protocols
By default, all COM ports are configured to use the ION protocol. If you want to 
make use of Modbus RTU, DNP, or GPS system, you need to configure the Protocol 
setup register for the Communications module that controls the port you want to 
use. However, the F
ACTORY
 protocol is reserved for the use by Technical Service 
Engineers.
Ethernet port
IP Boot Option
A BootP server automatically sets the IP Address, Subnet 
Mask, Gateway, and SMTP Mail Server IP Address.
– see your Network Administrator to determine if BootP is 
used
BootP
IP Address
This sets the IP Address of the meter
None (if BootP server is 
not used)
Subnet Mask
This sets the Subnet Mask setting for the Ethernet Port
None (if BootP server is 
not used)
Gateway
This sets the Ethernet Gateway setting for the Ethernet Port
None (if BootP server is 
not used)
SMTP Server
This sets the IP Address for the SMTP Mail Server that is 
configured to forward mail from the meter to the final 
destination
None (if BootP server is 
not used)
Communications Port
Setup Register
Function
Default