When the CPU changes to STOP:
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with the Fallback to 0 option, the outputs are forced to 0 if communication on the medium stops
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with the Hold Lost State option, the state of the outputs is maintained if communication on the medium stops
Automatic Slave Addressing
When this function is selected in the module configuration, a faulty slave can be replaced by a slave of the same type without stopping the AS-i bus and without the necessity for any special operation.
If the replacement slave is programmed with the same address and it has the same profile, it will be inserted automatically in the list of slaves detected and activated. If this is not the case, the AS-i indicator lamps flash.
If the new slave is unformatted (address 0, new slave) and it has the same profile, the slave will automatically take the address of the slave it replaces and will appear in the list of slaves which are detected and in the list of slaves which are active. If this is not the case, the AS-i indicator lamp flashes. These operations are only possible if a single slave in the configuration is faulty.
If communication with the processor is broken, the module switches to SAFETY position.
Causes of the communication break:
If there is a serious fault (faulty component, etc.), inside the module, it stops communication with the CPU and with the AS-i bus. The same behavior will occur when a module is removed while powered up.
Removing the Module While it is Powered Up: Hot Swap Function
When the module is removed while it is powered up, communication with the CPU stops, and the processor indicates a module fault.
Communication on the AS-i bus is also interrupted. In this case, the slaves which have a watchdog set their outputs to the required state. All others remain in the same position and cannot be set to 0 because the module can no longer provide communication.
Inserting the module while it is powered up
After the AS-i quantum module is powered up it waits to receive the configuration from the processor or for the mode push button to be pressed, otherwise it remains stopped.
Fault on the AS-i power supply
When there is a fault on the AS-i power supply module, communication stops and:
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the outputs of the slaves, which have a watchdog, are set to the required state, unless the slave draws its power from the AS-i medium
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the inputs of the slaves change to 0 as a result of loss of power
The AS-i indicator lamp being on shows this fault.
If the medium is broken, there are several possibilities:
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the medium is cut at the module output: the behavior is the same as when there is a power break, with disappearance of all the slaves and indication of a power supply fault
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the medium is cut beyond the AS-i quantum module and AS-i power supply assembly: all the slaves disappear and there is no indication of a power supply fault
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the medium is cut beyond the AS-i Quantum module and AS-i power supply assembly and a number of slaves. the slaves located beyond the break disappear and there is no indication of a power supply fault.
Recommend-ations for 24 V Auxiliary Power Supply
If the slaves are using a 24 V auxiliary power supply, the AS-i Quantum module does not manage the disappearance of this power supply. Data on the disappearance of this power supply can be fed back using a 24V input.
WARNING 