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4.23. UNIT’S TAIP REFERENCE
4.23.36
(XAKA) Keep Alive
Qualifiers
:
S
,
Q
,
R
This message is used to activate/deactivate a keep-alive to a given IP-
type
Destination Point
(see the
XADP
message). A keep-alive option
should be avoided as increases the transmission cost. Use this option
if you need to be able of interrogating the unit at any time and the unit
is working behind a NAT. The keep-alive transmission will prevent
the NAT from breaking the connection between your server and your
unit due to inactivity. The keep-alive packet contains the unit’s ID
without any TAIP message so your server has to expect these special-
non-TAIP messages. This option can be used both on TCP and UDP
IP-type destinations. The message has the following format:
ABBB
Chars
Item
Format
Value
Meaning
1
Destination
Point
A
0-9
The IP-type
Destination Point
index for
which the keep-alive is being configured.
2
Inactivity
time
BBB
001-999
minutes
or 000
Inactivity time in minutes. Use
000
to de-
activate the keep-alive mechanism.
All DPs
but DP 9 default to 000. DP 9 defaults to
60 minutes.
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