User manual

105G Wireless Gateway User Manual
Elpro_man_105g_1.18.doc Page 110
Command and response layout:
Command Response
Message ID
(ID) (ID)
Message Information
4002h 0002h
Command Number
0022h 0022h
Data Size
(request length) 0000h
Extended Word 1
Slave Add Slot No -
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 n
Data n
• Slave Address
Station address of the slave that indicates the alarm
• Slot Number
Used by the slave to indicate the source of the alarm.
Range 0 -254
• Seq Number
Unique identification number of the alarm.
Range 0 -31
• Alarm Spec Ack
Gives additional information about the Alarm, such as an error appears, or disappears. It also
indicates whether the slave needs additional acknowledge from the Master (Example:
Writing to a certain memory area with an Acyclic Write request).
Range 0 -7
• Alarm Type
Identifies the alarm type, such as Process Alarm, Plug Alarm etc.
Range 1 -6, 32 -126
• Extended Diagnostic Flag
FFh: Slave sends an alarm message with “Extended Diag flag ”set
00h: Slave sends an alarm message with “Extended Diag flag ”cleared