WI-GTWY-9-xxx Wireless Gateway V1.18
115
Alarm Indication
MSAL1_ALARM_IND: Command Number = 0022h
This message indicates that a DPV1 slave has transferred an Alarm message to the master. This
message is sent spontaneously by the WI-GTWY-9-xxx, i.e. the module itself initiates the
message instruction in the “Spontaneous Message OUT Area” (see “Message Interface
Addressing” above).
Detailed information about the alarm cause is presented in extended words 1-3 and the message
data field, see below.
The WI-GTWY-9-xxx may be configured to automatically provide a response to this command
(default), or the response may be provided externally via the message interface. The response will
trigger the module to send an MSAC1_Alarm_Ack to the slave. This will tell the slave that the
master has configured the alarm. The slave will in turn respond with a confirmation message, see
“Alarm Confirmation (MSAL1_ALARM_CON)” below.
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.