GW-7552-B / GW-7552-M PROFIBUS/MODBUS GATEWAY User Manual
(Version 1.60, May/2017)
PAGE: 67
6. Troubleshooting
The troubleshooting list can help users to resolve the problems when using the GW-
7552-B / GW-7552-M. If the problem still can't be solved, please contact with
technical staff of ICP DAS.
Table 17 Errors and solutions
Item Trouble state
Solution
1
'PWR' LED indication of
the GW-7552-B / GW-
7552-M is always turned
off
The power supply of GW-7552-B / GW-7552-M has some
problems. Please check the wire connection of the power and the
voltage is between 10~30VDC.
2
'ERR' LED indication of the
GW-7552-B / GW-7552-M
is always turned on
That means the GW-7552-B / GW-7552-M isn't connecting to
the PROFIBUS master station. Please check the wire connection
and the PROFIBUS master station. The configuration and
address of GW-7552-B / GW-7552-M in the PROFIBUS master
station are not correct.
3
'ERR' LED indication of the
GW-7552-B / GW-7552-M
is flashing fast
It means the GW-7552-B / GW-7552-M is in setting mode and
connects with Utility. Please close Utility and set the GW-7552-
B / GW-7552-M to operation mode (please refer section 2.6
Normal/Setting Dip Switch and section 4.6.2 Output data area
and communication command).
4
'ERR' LED indication of the
GW-7552-B / GW-7552-M
is flashing slow
It means the GW-7552-B / GW-7552-M has diagnostic
messages. Please check diagnostic messages in the Profibus
master station.
5
Profibus master station can
not communicate with the
Modbus
device,
when
“RUN LED” of the GW-
7552-B / GW-7552-M is
light and “ERR LED” of the
GW-7552-B / GW-7552-M
is dark.
a.
Please confirm the GW-7552-B / GW-7552-M is working in
operation mode and avoid clearing diagnostic message by
communication
command
(please
refer
section
2.6
Normal/Setting Dip Switch and section 4.6.2 Output data
area and communication command).
b.
Please confirm the connection between the GW-7552-B /
GW-7552-M and Modbus device.
c.
Please confirm Com Port setting of the GW-7552-B / GW-
7552-M (please refer section 4.3 The Configuration of the
common parameters) the same as Com Port setting of the
Modbus device.
d.
Please confirm module ID of the GW-7552-B / GW-7552-M
(please refer section 4.3 The Configuration of the common
parameters and section 4.4 The Configuration of the modules)
the same as Modbus address of Modbus device.
e.
Please confirm Setting of Start Address and NO. of
Relay/Coil is correct (please refer section 4.4 The
Configuration of the modules).
f.
Please confirm the output data put in correct address and have