COMMAND PROTOCOL
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4
4.10.1 Notification Message Table
The following table contains a listing of the nine possible
Notification Messages.
Bit
Notification Message
Event Description
0
CONTROLLER IS HEALTHY
Sent whenever the status of a controller changes
to ‘
Healthy
’
1
CONTROLLER HAS
PROBLEM
Sent whenever a controller is marked ‘
Has
Problem
’
2
CONTROLLER STOPPED
RESPONDING
Sent whenever a controller is marked ‘
Stopped
Responding
’
3
CONTROLLER DEACTIVATED Sent whenever a controller is deactivated (is
marked ‘
Inactive
’)
4
CONTROLLER MISSED POLL Sent whenever a controller misses a poll
5
CONTROLLER ADDRESS
CONFLICT
Sent whenever the Gateway detects a Node ID
conflict
6
CONTROLLER
CONFIGURATION FAILURE
Sent whenever the Gateway fails to configure a
controller
7
TAG PRESENT AT NODE*
Sent whenever a tag is first recognized in the RF
field of the specified node
8
TAG NOT PRESENT AT
NODE*
Sent when no tag is recognized or when a
previously recognized tag is no longer
acknowledged in the specified node’s RF field
Table 14: Notification Messages
*
Tag Presence
must be enabled on the RFID controller.
4.10.2 Notification Mask Example
In the following example, an RFID controller is attached to the Gateway’s Subnet network.
After power is applied to the controller, the Gateway immediately attempts to determine its
Node ID (
Node 04 in this example
). After recognizing a stored Node ID configuration, the
Gateway allows the device onto the Subnet network.
Now if bit 00 in the Notification Mask was enabled (set to one = ON), Notification Event 00
would be triggered and the Gateway would immediately write Notification Message 00 to the
Host. The Notification Message would indicate that a new controller was recognized at Node
04 and is functioning properly (i.e. the controller is healthy).
If, on the other hand, the recently connected controller does not power-up, or fails to initialize
properly, and bit 01 in the Notification Mask is enabled, Notification Event 01 will be
triggered, in which case the Gateway will write Notification Message 01 to the Host. This
message informs the host that the controller at Node 04 is experiencing a problem.
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