IB IL 24 MUX MA-PAC
56
PHOENIX CONTACT
5981_en_06
8.2
Startup behavior and system test
Startup
When the supply voltage U
MUX
(24 V DC) of the field multiplexer has been switched on, the
diagnostic LEDs UL, ST, CE, RE and LE light up for approximately one second (lamp test).
Then the ST, CE, RE and LE LEDs go out for one second. In these two seconds, the
connected I/O terminals initialize themselves and also receive their logic voltage when
U
MUX
is switched on.
System test
After startup, the field multiplexer changes to the stop state (ST LED on) and carries out a
system test. This involves the following activities:
–
Reading the "master/slave" and "copper/fiber optic" configuration signals
–
Testing of the field multiplexer hardware
–
Examination of the local field multiplexer station
–
Making contact with the opposite station and exchange of configuration data and status
messages
–
Comparing of the two configurations
–
Opening the alarm relay and switching off the ST LED if there are no errors
The system test activities mentioned above require about 0.5 s if there are no errors.
After the system test, the field multiplexers start normal operation. If an error occurs during
one of these activities, the corresponding diagnostic LEDs light up, and the field multiplexer
starts again by testing the field multiplexer hardware. If the same error continues to occur
upon startup, there will be a permanent error indication that can be evaluated for service
purposes. The field multiplexers will nevertheless continue to attempt to start the system.
Please refer to Section “Diagnostic indicators” on page 17 for information on the
diagnostic indicators of the field multiplexer.
Summary of Contents for 2861205
Page 1: ...User manual Configuring and installing the Inline field multiplexer...
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