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FX
-32DP PROFIBUS-DP Interface Block
3U
User's Manual
6.17
Start/Stop DP Communication [BFM #36 Bit0]
This BFM manually starts/stops the 32DP's DP Communication. The BFM value decides the 32DP's
communication state as follows.
Bit No.
Bit0 = 0
Bit0 = 1
6.18
Consistency Handling Error Flags [BFM #37]
This BFM shows Consistency Handling Error Flags. A consistency error occurs when users read/write BFMs
while they are being accessed by another instruction.
Error Status Register BFM#29 Bit5 also turns ON when a consistency error occurs. By resetting BFM#29
Bit5, BFM#37 resets. By writing 0 to BFM#37, BFM#29 Bit5 resets as well as Consistency Handling Error
Flags.
Bit No.
Cyclic Input Data Exchange Consistency
Bit 0
Error
Cyclic Output Data Exchange Consistency
Bit 1
Error
Acyclic Class1 Input Data Exchange
Bit 2
Consistency Error
Acyclic Class1 Output Data Exchange
Bit 3
Consistency Error
Acyclic Class2 Input Data Exchange
Bit 4
Consistency Error
Acyclic Class2 Output Data Exchange
Bit 5
Consistency Error
Bit 6 to 7
Not Available
Bit 8
Slave Diagnostics Send Consistency Error
Bit 9
Change Slave Address Consistency Error
Bit 10
Change Slave Address EEPROM Error
Bit 11 to 15 Not Available
*1.
Also refer to BFM#27.
Note
A consistency error also occurs when users monitor the output data receive area of the 32DP BFMs in data
consistency mode with programming Software (i. e. GX Developer).
The 32DP stops the DP Communication when the PLC is in STOP
The 32DP starts the DP Communication when the PLC is in RUN
The 32DP stays in the DP Communication regardless of the PLC RUN/STOP
Name
6.17 Start/Stop DP Communication [BFM #36 Bit0]
BFM Access : Read / Write
Description
BFM Access : Read / Write (Valid Value : 0 only)
Description
ON when writing to the cyclic Input-Send Area while
BFM#99 is 0
ON when reading the Cyclic Output Data Receive Area
while BFM#299 is 0
ON when writing to the Acyclic Input Data Send Area
while BFM#499 is 0
ON when reading the Acyclic Output Data Receive Area
while BFM#699 is 0
ON when writing to the Acyclic Input Data Send Area
while BFM#899 is 0
ON when reading the Acyclic Output Data Receive Area
while BFM#1099 is 0
ON when writing to the diagnostic/alarm(status) data
area while BFM#1300 is 1
ON when changing the 32DP address while the 32DP is
in Data Exchange mode or BFM#25 Bit8 (Address
Change Impossible Flag) is ON
ON when changing the 32DP address more than once in
*1
5 seconds
→ For details on BFM#25 Bit8, refer to Section 6.8
→ For details on BFM#27, refer to Section 6.10
6 Buffer Memory Allocation
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