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RLXIC-SV
♦
Intelligent Cellular
Configuring Modbus/BSAP
RadioLinx Intelligent Cellular Serial Modem for the Verizon Wireless CDMA Network
User Manual
Page 86 of 146
ProSoft Technology, Inc.
May 29, 2009
The destination port for the modem at the host needs to match the device port in
use on all the modems at the remote sites. For example, if the remote modem's
device port (see below) is "12345", then the Modbus host modem's
S53
destination port should be set to "12345".
Set the destination port (S53) to match the device port of the host modem
(*DPORT). Make sure the device port of the remote modem (*DPORT) matches
the destination port of the host modem (S53).
9.3.2 Configure IP addresses for the host.
If the Host modem has a static IP address, enter it in the Destination Address for
S53.
Note:
With a name instead of IPs for the host modem, the remote modems will query the DNS
server for the current IP assigned to the host modem before sending data back to the host.
If the modem at the host has a dynamic IP, and is using IP Manager, instead of
an IP address for S53, specify the name of the host modem (*MODEMNAME). If
the remote modems are using a different DDNS than the host modem, you will
need to specify the fully qualified domain name (*MO*DOMAIN).
Note:
Setting the Host modem IP address as the S53 Destination Address provides a low level
security. The modem will not forward UDP traffic unless the source IP/port matches what is in S53.
However, if you set *AIP=1, the modem will forward UDP traffic from any source IP address as long
as it is accessing the modem on the configured *DPORT.
9.3.3 Configure the default mode for start-up.
Each modem at the remote locations will need to be configured to communicate
with the modem at the host. In AceManager, select
UDP
in the side menu.
1
Enable
S82
, UDP auto answer.
2
Set
S83
to the idle time-out applicable to your application, commonly 20.