gefran GTF-Xtra Installation And Operation Manual page 25

A network typically has a Master that "manages" communication by means of "commands," and Slaves that carry out these
commands.
GTF modules are considered Slaves to the network master, which is usually a supervision terminal or a PLC.
It is positively identified by means of a node address (ID) set on rotary switches (tens + units).
A maximum of 99 GTF, modules can be installed in a serial network, with node address selectable from "01" to "99"
GTF modules have a ModBus serial (Optional)
The MODBUS RTU port 1 has the following factory settings (default):
Parameter Default
ID
1
BaudRate 19,2Kbit/s
Parity None
StopBits
1
DataBits
8
The following procedures are indispensable for the Modbus protocol.
Set the rotary switch at "0+0" for AutoBaud function
Parameter rotary switches
AutoBaud
PLC / HMI
NOTE
The standard products DO NOT feature the comunication RS485 Modbus serial port, but can be configured via PC with Gefran
GF-Express Software, by connecting it to TTL port of GTF to PC, by means of TTL cable equipped with SW.
PC
NEVER connect TTL adaptator to RS485 serial port of GTF.
NEVER connect TTL connector or GTF to a RS485 serial web .
Danger of product damage!!
80994B_MHW_GTF-Xtra_05-2016_ENG
4 • INSTALLATION OF THE SERIAL PORT
Range
1...99
1200...19200bit/s
Odd/Even/None
-
-
Position
tens unit
0 0
Allows setting of the
correct BaudRate value
automatically detecting
the master transmission
frequency
RS485 MODBUS RJ10 Cable
Gefran Adapter
RS232 or
F049095
USB
F043956 or
GTF with RS485
TTL cable RJ10
GTF standard
25