CANopen
7
Troubleshooting and fault elimination
7-1
L
BA2175 EN 2.0
7
Troubleshooting and fault elimination
7.1
No communication with the controller
Possible causes
Diagnostics
Remedy
Is the controller switched on?
The operation status LED of the basic
unit must be on
^
4-1 Point 3.
Supply controller with voltage (see Operating Instructions for the basic unit)
Is the fieldbus module supplied with
voltage?
The green LED for “Controller
connection status” on the fieldbus
module
^
4 1
t b
(R
d 1)
With supply from the basic unit check the connection. With external supply check
the 24 V voltage at terminals 39 and 59.
A voltage between 24 V +10 % must be applied.
^
4-1 must be on (Remedy 1) or
blinking (Remedy 2)
The fieldbus module has not been initialised with the controller yet.
Possibility 1: Controller not switched on (see fault possibility 1).
Possibility 2: Check the connection to the controller
Does the controller receive telegrams
The LED “Bus connection status“ on the
fieldbus
^
4-1 must be blinking in green
h
th d i
i
i ti
ith
Check whether the connection corresponds to the instructions given in chapter
”CAN bus wiring“, page.
^
4-1 .
Check whether host sends telegrams and uses the appropriate interface.
g
g
when the device is communicating with
the host.
CAN controller address (L-C0009 / DIP switch) and baud rate (L-C0125 / DIP
switch) can be set differently for controller and host. Ensure that the addresses
are identical.
The controller address (L-C0009) must be different for all connected devices.
Check whether some addresses are used twice and correct them if necessary.
Check the wiring to your host.
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