ProSoft Technology MVI69-PDPMV1 - Manual (Page 126)

Mailbox Messaging MVI69-PDPMV1 ♦ CompactLogix or MicroLogix Platform
User Manual PROFIBUS DPV1 Master
Page 126 of 225 ProSoft Technology, Inc.
July 8, 2011
4.4.16 Mailbox Message: Alarm Indication
This message indicates to the application that a DPV1 slave has transferred an
alarm message to the Master. This mailbox message is sent spontaneously by
the module; the module itself initiates the mailbox communications.
Detailed information about the cause of the alarm is presented in extended words
1 to 3 and in the message data field (see below).
Command and Response Layout: Alarm Indication
Command Response
Message ID (ID) (ID)
Message information 4002h 0002h
Command 0022h 0022h Alarm Indication
Data size (request length) 0000h
Frame count 0001h 0001h
Frame number 0001h 0001h
Offset high 0000h 0000h
Offset low 0000h 0000h
Extended word 1 Slave
Address
Slot Number -
Extended word 2 Seq Number Alarm Spec
Ack
-
Extended word 3 Alarm Type Ext Diag -
Extended word 4 - -
Extended word 5 - -
Extended word 6 - -
Extended word 7 - -
Extended word 8 Fault Information -
Message Data byte 1 Data 1
Message Data byte 2 Data 2
Message Data byte 3 Data 3
… …
Message Data byte n Data n
Slave Address
Station address of the slave that issued the alarm.
Slot Number
Used by the slave to indicate the source of the alarm. Range 0 to 254.
Seq Number
Unique identification number of the alarm. Range 0 to 31.