Funk-Electronic Piciorgros GmbH
TGW-100/TGW-100R
V2.71 - Page 51 of 59
4.2.7
User-Protocol
Using user-defined protocols, the exact position of the address bytes and the address
length can be pre defined.
If these parameters are unknown, the “Transparent Data Communication” can be used
(see below).
4.2.8
Transparent Data Communication without Protocol Filter (User Defined)
Protocols, where the address byte can not be extracted, or where the „Address Range“
exceeds the TGW-100 storage spectrum, (1024 entries, e.g.: sometimes that can happen
using the HART protocol) can be transmitted using the Group ISSI or a fixed, prede-
fined ISSI.
Care should be taken when using the GISSI communication, as this method increases
the over all load of Tetra networks.
In case the ISSI parameter is set to not equal zero for COM or AUX, all data will be
transmitted to that particular ISSI. In this particular case, the routing is ignored.
When a packet data passed transmission is used, broadcasting may not be possible by
the TETRA network, so individual addressing should be used here.
4.2.9
Hart-Protocol
Serial HART was tested with the TGW-100 simultaneously with the DNP3 protocol.
The DNP3 was communicating over the COM port while HART was transferred data
via AUX. In that application the TGW-100 was used with an ETELM switch and
Infrastructure.
