182 Al Status Code Register; Ethercat Communication Methods - IFM Electronic Ecomat 300 AL1030 Device Manual

IO-Link Master EtherCat
18.2 AL Status Code Register
If the state transition required by the master is not possible, an error flag is set
by the slave in the AL Status Register (bit 4) and an error code is written to the
AL Status Code Register
AL status Description
code (hex)
0000 no error
0001 Unspecified error
0011 Invalid requested state change
0012 Unknown requested state
0015 Invalid Mailbox Configuration for
Bootstrap
0017 Invalid Sync Manager Configuration
001B Sync Manager Watchdog
001D Invalid output configuration
001E Invalid input configuration

19 EtherCat communication methods

The EtherCat protocol offers two methods of communication:
– Mailbox method
– Buffered method
The mailbox method is used to send acyclic commands to slaves If a slave
receives a mailbox message, this message must first be processes before
anything else can be processed
The buffered method, however, makes it possible both for master and slave to use
a shared data area The data in this area (buffer) can be written or read by both at
any time
The Sync Managers manage the data exchange for both methods to avoid
data collisions A detailed description of all Sync Managers is available in the
description "EtherCat Slave Controller" of the EtherCat user organisation (www
EtherCatorg)
32
State Resulting state
or transition
Each Current situation
Each Each + E
I→S, I→O, P→O Current state + E
O→B, S→B
Each Current state + E
I→B I + E
P→S, S→O Current state + E
O, S S + E
O, S S + E
P→S P + E
O, S, P→S P + E