Mitsubishi Electric melsec q03ud(E)cpu, User Manual

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(2) Control data
*3 The "Set by" column indicates the following.
System: The CPU module stores the execution result of the SP.SOCRCV instruction.
*4 0 to 2046 for the QnUDE(H)CPU with a serial number (first five digits) of "12051" or earlier
●
Receive data size is 2046 bytes by default. To receive data over 2046 bytes, change the receive data size with the
SP.SOCRMODE instruction.
● When the SP.SOCRCV instruction is executed, data are read from Socket communication receive data area at END
processing. Therefore, executing the SP.SOCRCV instruction will increase the scan time.
●
If the CPU module receives odd-byte data, invalid data is stored to the high byte of the device where the last received
data is stored.
Device Item Description Setting range
Set by
*3
+0
System area - - -
+1
Completion
status
Completion status is stored.
0000
H
: Completed
Other than 0000
H
: Failed (Error code)
-
System +0
Receive data
length
The length of the data which were read out from
the Socket communication receive data area is
stored (in bytes).
0 to 10238
*4
+1
to
+n
Receive data
The data which were read out from the Socket
communication receive data area are stored in
order.
-
S2
S2
D1
D1
D1