Exchanged Data By Default Parameter - Mitsubishi FX2N User Manual

FX2N-32DP-IF Profibus Interface unit
*3 After power on, the default setting of this parameter is 0, as the BFM addresses for read-
ing/writing command are not coded in the parameter data, but are sent together with the
Profibus data. For exchanged data, refer to appendix A-2.
*4 "y" is number of connected special function blocks to 32DP-IF. (y = 1 8)
A-2

Exchanged Data by Default Parameter

After power on, the bus node does not know about the I/O features of the connected special
function blocks. So each special function block is assigned to one reading command and one
writing command. The exchanged data is as follows:
Table A-2: Exchanged Parameter Data
Times
Special function block's BFM address is writ-
1st ten for input data (Reading from 32DP-IF)
(Bit15 = write flag)
This data is written to special function block's
2nd
BFM for output data.
Special function block's BFM address is writ-
3rd ten for output data (writing to 32DP-IF)
(Bit15 = write flag)
Example
Reading BFM #17 and writing K1000 to BFM #9 in the special function block.
Table A-3: Example Exchanged Parameter Data
Times
8011hex = 11hex (17 dez = BFM #17) + 8000 hex
1st
(bit15=1)
2nd 03E8 hex = (1000 dez)
8009 hex = 09 hex (9 dez = BFM #9) + 8000 hex
3rd
(bit15=1)
Output area (send)
Output Data
Input area (receive)
This value is BFM's data read from special
function block.
This value was written to special function
block's BFM.
(Written value is read back)
This value was special function block's BFM
address.
(Written value is read back)
Input Data
nnnn = hex value of BFM #17
03E8 hex = hex value of BFM #9
8009 hex = verification of BFM address
Appendix A
A-2