Diagnostics
Measures in case of troubled communication
12
l
88
EDSMF2178IB EN 3.0
12 Diagnostics
12.1 Measures in case of troubled communication
The following table shows error causes and remedy measures if there is no
communication with the controller.
Possible
cause of error
Diagnostics Remedy
Is the controller switched
on?
One of the operating
status LEDs of the basic
device (2) must be on.
Supply controller with voltage (see Operating
Instructions/Manual for the basic device)
Is the communication
module supplied with
voltage?
The green LED 0
(connection status with
controller) is on (remedy 1)
or blinking (remedy 2).
l In case of supply from the controller check the
connection. With external supply check the 24 V
voltage at terminals 39 and 59.
A voltage of 24V +10% must be applied.
l The communication module has not been initialised
with the controller yet.
l Remedy 1: Controller not switched on (see fault
possibility 1).
l Remedy 2: Check the connection to the controller.
Does the controller receive
telegrams?
The green LED 1
(connection status with
bus) must be blinking
when communicating with
the host.
Check whether the connection corresponds to the
instructions given in the chapter "Electrical
installation".
Check whether host sends telegrams and uses the
appropriate interface.
Is the existing node address already assigned?
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