Mitsubishi FX3U-32DP, User Manual

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50
FX
3U
-32DP PROFIBUS-DP Interface Block
User’s Manual
6 Buffer Memory Allocation
6.37 Diagnostic/Alarm (Status) Data Area
6.37.3 Block Length [BFM # 1303]
BFM Access : Read Only
This BFM shows the diagnostic alarm data length.
6.37.4 Alarm/Status Type [BFM #1304]
BFM Access : Read Only
This BFM shows the Alarm/Status type as follows:
0x01 = Alarm Message
0x81 = Status Message
6.37.5 Slot Number [BFM #1305]
BFM Access : Read Only
This BFM comes from the PROFIBUS DP Specification, displaying the number of the special function blocks
sending the alarm.
The 32DP’s value here is always "0".
6.37.6 Specifier [BFM #1306]
BFM Access : Read Only
*1. This specifier comes from the PROFIBUS DP Specification, displaying the message status.
The 32DP’s value here is always "0X00."
*2. This also comes from the PROFIBUS DP Specification, displaying the
additional acknowledge handling.
The 32DP’s value here is always "0".
6.37.7 Extended Alarm Data [BFM #1307]
BFM Access : Read Only
The 32DP allocates the content of BFM#28 here.
6.37.8 Extended Alarm Data [BFM #1308]
BFM Access : Read Only
The 32DP allocates the content of BFM#29 here.
6.37.9 Extended Diagnostic/Alarm(Status) Data Area [BFM #1309 to #1322]
BFM Access : Read / Write
This is the user-defined data storage area for the user diagnostic data. A maximum of 28 Bytes can be stored.
Bit No. Description
Bit 0
Bit 1
The Alarm/Status specifier defines the message status
*1
0x00 : No further distinction
0x01 : The error occured and the slot number (BFM#1305) has an error
0x02 : The error disappeared and the slot number (BFM#1305) has no error
0x03 : The error disappeared and the slot number (BFM#1305) has an error
Bit 2
Additional Acknowledge
ON when the message needs additional acknowledging
*2
Bit 3 to 7
Sequence Number
This BFM shows the sequence number of the message
The sequence number range lies from 0 to 31