Hitachi S10mini User Manual page 110

5 USER GUIDE
<Transparent reception task>
When a transparent message is received in situations where a transparent reception task is
registered in the FL.NET module, task queuing takes place with the start factor (transparent
reception task's factor) that is set for the task number of the registered task.
If the registered task is not released, however, it does not start.
<Transparent receiving flag>
When a transparent receiving flag is set for the FL.NET module, a 16-word area beginning with
the associated selected address is used as a transparent-type reception flag area.
When the FL.NET module receives a transparent message, the transparent receiving flag area
indicates the node from which the message has been transmitted.
A total of eight cases of transparent message reception buffer are readied.
When a transparent message is received, it is first stored in the reception buffer. When it is
stored, its transmission source node number is checked, and the bit corresponding to the
transmission source node number for the transparent receiving flag area is set.
After the transparent message is fetched by the user, a check is conducted to determine whether
messages having the same transmission source node number as for the message delivered to the
user remain within the transparent message reception buffer.
When there are no more messages having the same transmission source node number, the bit
corresponding to the transmission source node number for the transparent receiving flag area is
reset.
However, when a received transparent message is for a TCD that is related to a function
(preselected task control and preselected subroutine control) uniquely supported by the FL.NET
module, it is not handled as a transparent message.
A transparent receiving task and transparent receiving flag can be set up with the setup tool
named [FL.NET For Windows®]. For details on the procedure, See "5.6 Operating
Method."
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