
B-64164EN/01 SPECIFICATION 3.MESSAGE TRANSMISSION
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Table 3-5 Byte Block Read Interface Items
Interface item Description Direction
Transaction
code
Request message: 65003
Response message: 65203
U→S
S→U
Offset address
on virtual
address space
Request message: Offset address on virtual
address space of byte block
data to be read from the
server
Response message: Same as above
U→S
Data size Request message: Size of byte block data to
be read from the server (in
bytes)
Response message: Size of byte block data
actually read from the
server (in bytes)
U→S
S→U
Read data
buffer start
address
(Note 1)
Request message: Start address of an area in
the PMC area used to store
byte block data read from
the server
Response message: Same as above
U→S
Read data Request message: Reserved
Response message: Byte block data actually
read from the server.
When an abnormal
response is returned, an
error code is stored.
S→U
NOTE
1 The read data buffer is allocated to the same PMC
area as for this interface.
Therefore, when this interface is allocated to the R
area of the first PMC, the read data buffer is also
allocated to the R area of the first PMC.
2 For an error code stored when an abnormal
response is returned, refer to the manual of the
equipment of a message transmission destination.