DNP3 Manual
M6xxD/EN M/B
M6xx
Page 33
Configuration
Parameter
Description
Default or
Options
Unsolicited
Response
UR Enable
Determines whether unsolicited responses are
allowed. If unsolicited Response Enable is FALSE,
no unsolicited responses will be generated and
requests to enable or disable unsolicited responses
will fail.
Default is box
unchecked,
checking the box
enables this
function.
Enable Initial Null
Determines whether unsolicited null responses will
be sent when session comes online. Specs say
send initial unsolicited null response on restart.
Previous versions of SCL would also send
unsolicited null response when a session came
back online. Add this configuration to allow user to
maintain that behaviour by setting this to TRUE if
desired.
Default is box
unchecked,
checking the box
enables this
function.
Class1 Count
When unsolicited response is enabled, the
maximum number of events that are stored before
an unsolicited response is generated.
Default is 5,
maximum is 255.
Class1 Timeout
(ms)
When unsolicited response is enabled, the
maximum amount of time (in ms) after an event
before an unsolicited response is generated.
Default is 5000
ms
Class2 Count
When unsolicited response is enabled, the
maximum number of events that are stored before
an unsolicited response is generated.
Default is 5,
maximum is 255.
Class2 Timeout
(ms)
When unsolicited response is enabled, the
maximum amount of time (in ms) after an event
before an unsolicited response is generated.
Default is 5000
ms
Class3 Count
When unsolicited response is enabled, the
maximum number of events that are stored before
an unsolicited response is generated.
Default is 5,
maximum is 255.
Class3 Timeout
(ms)
When unsolicited response is enabled, the
maximum amount of time (in ms) after an event
before an unsolicited response is generated.
Default is 5000
ms
Max Retries
The maximum number of unsolicited retries before
changing to the ‘Offline Timeout’ period described
below. This parameter allows you to specify up to
65535 retries. If you want an infinite number of
retries set Offline Timeout to the same value as
Retry Timeout.
Default is 3
Retry Timeout
(ms)
Specifies the time, in milliseconds, to delay after an
unsolicited confirm timeout before retrying the
unsolicited response.
Default is 5000
ms
Offline Timeout
(seconds)
Specifies the time, in seconds, to delay after an
unsolicited timeout before retrying the unsolicited
response after the Max Retries listed above have
been attempted. To disable retries after Max
Retries set this value to the maximum value of
65535.
Default is 30
seconds
Default
Variations
Specifies the variation that will be used for
unsolicited responses and in response to a read
requesting variation 0.
