Functional Description; Start-Up Behavior; Offline Phase; Detection Phase - WAGO -I/O-SYSTEM 750 Series Manual

16 • 750-655 [AS-Interface master module]

Functional description

2.1.1.6 Functional description
2.1.1.6.1

Start-up behavior

After switching on, all LEDs illuminate as part of a self test. Following this,
the LEDs indicate the status of the respective flags. On start-up, the AS-
Interface master module runs through the following phases:
Fig. 2.1.1-5: Start-up behavior
2.1.1.6.1.1

Offline phase

The master module is initialized; there is no exchange of data with the slaves.
Note
The master module will remain in the offline phase if the AS-Interface
circuit is not adequately supplied with power (U AS-I does not come on).
The offline phase can be exited in start-up mode or when the WAGO-I/O-
CHECK 2 commissioning tool starts automatically.
2.1.1.6.1.2

Detection phase

Beginning of start-up operation, in which a search is carried out for slaves
present on the AS-Interface. The master module remains in the detection
phase until at least one slave has been detected.
Offline phase
Detection phase
Activation phase
Data exchange phase
Management phase
Acquisition phase
Initialisation
Start-up mode
Normal mode
WAGO-I/O-SYSTEM 750
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I/O Modules