GW-7552 PROFIBUS/MODBUS GATEWAY Quick Start User Guide
(Version 1.00)
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PROFIBUS connection
Here we recommend users to use the standard PROFIBUS cable and
connector (DB9 male). It is only needed to use D-type connector via
PROFIBUS cable to connect PROFIBUS master station and GW-7552
module. PROFIBUS master station and GW-7552 module belong to terminal
equipments in this example, thus we need to enable the terminator resistor in
the D-type connector.
Address setting
The GW-7552 is a slave device of PROFIBUS DP protocol. The station address
of GW-7552 can be set by dip switch. The dip switch can be seen by open the
cover, as shown in the below. The range of dip switch is 0~126, here we set
GW-7552 module’s dip switch to 1.
LED status indicator
LED
Status
Description
flash
When the GW-7552 is as a Modbus slave device and receiving
query message form Modbus master device, PWR led will flash.
on
Power supply is ok.
The firmware has loaded.
PWR
off
Power supply has failed.
flash
When the GW-7552 connects with the utility tool, it will flash
fast (flash once about 55ms).
When the GW-7552 has diagnostic message, it will flash slowly
(flash once about 220ms).
ERR
on
The connection is error with PROFIBUS master device or
PROFIBUS system configuration is not correct.
DIP SWITCH(SW1)
Station
address
1
2
3
4
5
6
7
8
1
1
0
0
0
0
0
0
0
10
0
1
0
1
0
0
0
0
31
1
1
1
1
1
0
0
0
