Mitsubishi FX2N-32DP-IF, User Manual

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FX2N-32DP-IF Profibus-DP Interface Unit User Parameter 7
7-11
Read and Write Operation:
To execute both a read and a write operation at the same time, keep the following order:
a) Write the BFM number to read + MSB = 1 into “FROM ADDRESS”
b) Write the data to write into “TO DATA”
c) Write the BFM number to write to +MSB=1 into “TO ADDRESS”
If this procedure is performed, the “FROM DATA” is valid and the write operation is complete
when the read back values become the same as “TO DATA” and “TO ADDRESS”. Please
take care of the MSB of “TO ADDRESS” before writing new data into “TO DATA” (see Write
operation (TO)).
Ex- Profimap “Input CPU Device” = D0, “Output CPU Device” = D20
*1 This data resister is in 32DP-IF module.
To read BFM 5 of special function block 3 (FX
2N
-4AD in simple communication 3W-IF):
a) Write 8005hex (MSB=1 + BFM 5 address) to D28.
After 2
×
Profibus cycle time + 1
×
FX
2N
-32DP-IF cycle time (see D8010, D8011, D8012)
D4 will contain the value of BFM5.
b) Write 8005hex (MSB=1 + BFM 5 address) to D28. MSB of D30 must be 0.
If D6 = D28 the operation is complete and D4 contains the value of BFM5.
To set the number of samples for channel 2 (BFM2) of SFB 3 to the value 10:
Write first 10 to D29 then 8002hex (MSB = 1 + BFM 2 address) to D30. The write operation
has been completed successfully if D5 is the same as D29 and D6 the same as D30.
Table 7.10: Example Configuration
configuration 32DP-IF
FX
2N
-4DA
(Extension
Configuration)
FX
2N
-4DA
(Short
Configuration)
FX
2N
-4AD
(Short
Configuration)
FX
2N
-4AD
(Simple
Communication
3W-IF)
parameter size 2 byte 50 byte 11 byte 11 byte 4 byte
cyclic
read data
size 0 byte 0 byte 0 byte 8 byte 6 byte (3 words)
Data
register
*1
- - - D0 ~ D3 D4 ~ D6
cyclic
written
data
size 0 byte 8 byte 8 byte 0 byte 6 byte (3 words)
Data
register
*1
- D20 ~ D23 D24 ~ D27 - D28 ~ D30