Installation Of Modbus Serial Network - gefran GEFLEX GFX-M1 Series Operating Instructions And Warnings

In a network, there is typically a Master that "manages" com-
munication by means of "commands" and Slaves that interpret
these commands.
Geflex Masters are to be considered slaves to the network
master, which is usually a supervision terminal or PLC.
In addition, both the Geflex Masters and Slaves are identified in
an unequivocal manner by means of a node address (ID).
The Geflex Master differs from the Geflex Slave only because
the Geflex Master can be connected to the fieldbus.
In addition, the Geflex Master shows the state of the Geflex
Slave on its outputs "OUT4" and "OUT5" by means of the OR
and AND functions:
Green "STATUS" LED
flashes at 5Hz
12

4. INSTALLATION OF MODBUS SERIAL NETWORK

SERIAL NETWORK
YES
First installation of network
"AUTONODE"
SEQUENCE
The Geflex Masters are available (see order code) with one of
the following protocols: ModBus, Profibus or CANopen.
The following procedures are to be considered indispensable
for the ModBus protocol.
For the other protocols, refer to the specific Geflex Profibus and
Geflex CANopen manuals.
GEFLEX modules are supplied preset for 19200 baud without
parity and with rotary selector for node address "0".
A maximum of ninety GEFLEX modules can be installed in a
serial network, with node address selectable from "10" to "99".
INSTALLATION
?
Serial network communication
speed is 19200 baud
NO
"AUTOBAUD"
Green "STATUS" LED
flashes at 10Hz
SEQUENCE
Replacement or addition of a module
?
Master
SETTING
THE NODE
ADDRESS
SEQUENCE
OPERATIVE
Green "STATUS" LED
flashes at 2Hz
FUNCTION
?
Slave
Green "STATUS" LED
"CHANGE"
flashes at 5Hz of
master
80331F_MHW_GFX-25/120A_05-2014_ENG