SATELLINE-3AS
User Guide, Version 2.3
52
The overhop function allows for the use of mobile substations. In the example above, a mobile
substation is first located in the coverage area of repeater R2. The route is defined as M, R1, R2
and vehicle. When the vehicle moves to the coverage area of repeater R1, the radio modem
picks the packet already from the transmission of R1. This is then transferred to the serial port
using an additional delay, so that the timing does not differ from the first situation where the
radio modem of the vehicle was in the coverage area of repeater R2. In this way a collision of
the reply transmission and the transmission by repeater R2 is prevented. When the mobile station
is transmitting, it is enough that at least one radio modem defined to be a part of the route
receives the transmission.
7.3.4 Special protocols
Although the settings of the
Message Routing
can not be set to support all user protocols, there
are some special protocols, shown below, supported directly by Satelline-3AS radio modems.
·
IEC 60870-5-101 is a protocol commonly used in control applications of power lines.
·
RP570 protocol
7.3.5 Network ID
The Network ID is a string of up to eight characters, which is used to prevent the reception of the
messages coming from an external system. The radio modems operating in the same system
using
Message Routing
must have the same Network ID. Only the messages that have a
matching Network ID are received.
M
R2
R1
