HMS A8NDPV1 Instruction Manual page 93

Get Started
Proceed to issue the actual request by setting the appropriate BFMs. Set the slave address, slot
number, target index, length of data and transfer the data of the request that was prepared
above. Finally set the acyclic write request flag (BFM#4510).
Receiving the response
When the write request has been processed, BFM#4510 will be equal to 0. If the request is com-
pleted successfully (BFM#7000 is equal to 0), then perform a response read. In case of an error,
read the error details from BFM#7008. For an explanation of the error codes refer to the FX3U-
64DP-M user manual.
To issue the read request, set the slave address, slot number, target index, and length of data of
the expected response. It should be noted, that 240 bytes can always be read. This is the maxi-
mum allowed length of a response. In case of a shorter response, only the available data will be
read.
When the read request has been processed, BFM#4500 will be equal to 0. Similarly like before
BFM#7000 will be checked for any errors.
A8NDPV1 PROFIBUS Option Board
GX Works2 (FX-CPU) Acyclic communication example
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