CHAPTER 40
Free terminal protocol
405.1200.037.2 - Rel.: 2.21 of 25/02/2008
40-14
Free terminal
in Network
Using the Free terminal protocol the VT can be connected in a RS485
linked network to enable a master device to show information to or request
information from the various connected terminals.
Each connected terminal in this network must have been loaded with the
Free terminal protocol and must have a different network address from any
of the other addresses in the network (01 -> 31). If the address is 00, the ter-
minal is not considered to be a participant in the network.
To change the network address see Page 40-3.
Once the terminal has been connected to the network (with an address other
than 00) and switched on, the VT terminal’s behavior is different from that
seen in the previous paragraphs. The VT will not respond to any command
unless it has been addressed. Addressing a terminal means that from that
moment on the master device will communicate exclusively with that ter-
Table 40.8: Association between VT160 keys and hexadecimal codes
Hexadecimal code
A0 A1 A2 A3 A4 A5
A6 A7 A8 A9 AA AB
AC AD
AE AF B0 B1
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