Hitachi FL.NET User Manual page 104

Also, selectively use an appropriate mathematical/logical function depending on the
employed module setup. (When issuing a request to a main module, use the main
module mathematical/logical function FLCM. To issue a request to a submodule, use the
submodule mathematical/logical function FLCS.)
Note: For bit allocation for the self-node status flag, see "5.3.6 Using the management
tables."
When issuing a request to the FL.NET module, do not simultaneously use the
C mode handler and mathematical/logical function.
You cannot specify an index in a parameter (PI/O address.)
(4) Transparent message reception
The figure below outlines the operation performed for transparent messages.
Client side
Ladder/C program
Message
preparation
Message
transmission flag
set
Message
transmission flag
reset
The FL.NET module has special functions concerning the reception of transparent messages.
NOTICE
FL.NET module
Transmission process
(Up to three
retransmissions)
Requested message
generation
Requested message
transmission
FL.NET module
Reception process
Message reception
Reception flag set
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5 USER GUIDE
Server side
Ladder/C program
Reception
task start
Data read
Reception
flag reset