Porting of the host application
Copyright IXXAT Automation GmbH
49
IEM Manual, 1.5
If the indication/confirmation channel is deactivated, host located variables
can’t be supported. Before creating records or array variable types at Ether-
CAT, the first element (describing the structure) has to be set to avoid auto-
matic host placement. It is recommended to use the acyclic area in this case.
It has to be considered that PROFINET uses indications to signal module and
submodule configuration states.
3.3.2 Administration queues
The number of administration queues (
ABM_cfg_NUM_QUEUE_ELEMENTS
) can
be scaled from 1 to a maximum of 128 (default setting). A value of 1 only al-
lows using one service channel in each direction at a time. With values greater
than 1, parallel services are supported. In combination with disabling the ser-
vice channels it can also be set to zero (see 3.3.1).
3.3.3 Memory management
The payload of a service consists of service header size and data content. If
the maximum is less or equal than
COM_k_SERVICE_MAX_PAYLOAD_SIZE
,
segmentation of services is not necessary, and the memory resources man-
aged at GEO.c can be reduced.