M
M
F
F
W
W
-
-
Z
Z
D
D
-
-
B
B
A
A
-
-
U
U
K
K
-
-
0
0
0
0
6
6
P
P
a
a
g
g
e
e
1
1
6
6
o
o
f
f
2
2
4
4
A system from the MFW product family
7 Diagnostic functions
A variety of diagnostic information is available to monitor and assess the system functions. These
include, for instance, individual station fields indicated via the LED matrix or signalling via relay
contacts, or more detailed information via the diagnostic interface.
7.1 “Operating condition” indicator light and signalling relay.
The “operating condition” indicator light provides information about the current error status:
•
Permanent light = no error
•
Flashing
= fault
•
Off
= no power supply
The sequence of flashes is composed of:
No. of long flashes
Æ
1st error code digit
No. of short flashes
Æ
2nd error code digit
Pause
For example: long, short, short, short, pause = error code 13
When more than one error occurs at the same time, the one with the highest priority is always
the one that is indicated.
In addition to the “operating condition” indicator light, a relay with change-over contact indicates the
state of the station. (The status of the complete system is indicated on the master module).
Contact 14 / 15 closed - power failure or error (
Contact 15 / 16 closed - no error
7.2 Error codes
No Error
Comment
12 CAN bus error
Communication with an expansion module is disrupted or the
expansion module is faulty.
13 Substation error
An error has occurred in a substation.
15 Substation/ master is not
accessible
At least one substation does not respond to the master’s
queries. The error occurs on the substation if it is no longer
queried by the master or when it doesn’t recognise the
telegrams.
61 Serial interface error
There are communication problems on the protocol interface.
This errors only occurs for basic modules with a
communication interface.
Table 4: Error codes
