Glossary - Pepperl+Fuchs AS-I 3.0 PROFINET Manual

AS-i 3.0 PROFINET Gateway in Stainless Steel

Glossary

13. Glossary
A/B slave
An AS-i slave with extended addressing. The address range of an A/B slave ex-
tends from 1A to 31A and 1B to 31B. As the master needs the fourth output data
bit for switching between A and B address, A/B slaves only have three output data
bits maximum.
Activation phase
In the activation phase the detected slaves are activated by sending the parame-
ter. This is indicated by a "42" on the Master's Display. This phase takes only 10
ms, tops, to short to be displayed.
AS-i Power Fail
Voltage drop on the AS-i line; If the voltage drops below a specific value, the mas-
ter changes to the ⇒ Offline phase.
Initiation phase
After the initial data exchange with all AS-i slaves the master is looking for new
slaves. For this purpose an inquiring call is sent to one AS-i address. If a reply is
received, the master tries to read the ⇒ current configuration of the slave. De-
pending on the mode (⇒ protected mode or ⇒ configuration mode) and on the
current configuration, the detected slave will be activated.
After each data exchange with all AS-i slaves exactly one inquiring call is sent to
one slave address. Hence, the AS-i cycle always includes one more telegram
than the number of activated slaves (⇒ LAS).
Autoprog flags
Auto Address Enable; flag from the operating system to the AS-i Master.
With this flag, automatic addressing can be enabled or disabled. This flag is
saved in non-volatile memory in the Master.
Auto Address Assign, Auto Address Possible; flag from the AS-i Master to the op-
erating system.
Automatic programming is not disabled and no configuration error was
found.
If a slave fails, it could be addressed automatically.
Auto Address Available, flag from the AS-i Master to the operating system. Exact-
ly one AS-i slave is missing and the automatic single node replacement is not dis-
abled.
If at this point a slave with the address 0 and the profile of the missing slave
is connected, it automatically receives the address of the missing slave.
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