Lenze EMF2141IB - Manual (Page 75)

Troubleshooting and fault elimination
7-1
L
_^ONQN bk NKM
7 Troubleshooting and fault elimination
7.1 No communication with the controller.
Possible causes Diagnostics Remedy
Is the controller switched on? One of the LED for the operating status must
be on.
^ 4-1 .
Controller supply (see Operating Instructions for controller)
Is the fieldbus module supplied with
voltage? The green bus LED on the fieldbus module
must be
^ 4-1 on or blinking
With internal supply, check the connection to the controller.
With external supply, check the corresponding terminals for a 24-V voltage: A
voltage of 24 V
± 10 % must be applied.
The fieldbus module has not been initialised with the controller yet.
Possibility 1: Controller not switched on
Possibility 2: Check controller connection
Does the controller receive
telegrams? The yellow bus LED on the fieldbus module
^ 4-1 must be blinking when a telegram is
i d tl
Check the wiring.
Check whether host sends telegrams and uses the appropriate interface.
g g g
received correctly.
For testing, send telegrams cyclically from
the master
The LON address can be set differently for controller and host. Ensure that
the addresses are identical.
the master.
The addresses for all connected controllers must be unambiguous. If
necessary, correct addresses.
Check wiring to the host.
7.2 Controller does not execute write job
Possible causes Diagnostics Remedy
Does the controller send a negative
acknowledgement? Operating mode L-C0001: The operating mode C0001 does not match when
L-C046 or L-C0135 are being addressed.
Set L-C0001 = 3.
Please see the corresponding information given in chapter ”Parameter setting”,
^ 6-1
This parameter can only be read. See the corresponding Operating Instructions.
Does the controller send a positive
acknowledgement? ACK response from the controller. 82XX parameters can only be changed when the controller is inhibited.
Please see the corresponding information given in chapter ”Parameter setting”,
^ 6-1
The controller uses a different parameter set. The parameter change will become
active after the parameter set has been changed.
Show/Hide Bookmarks