Licht
http://www.licht-labs.com
Rev. A2 (30–05–12)
MFC-202/P Technical Manual
10
scheme is implemented. Before transmitting, the MFC-202/P always waits for the line to
become idle. Once that happens, it waits for
T
delay
=
T
f ixed
+
T
random
ms, where
T
f ixed
is the fixed backoff delay and
T
random
is a random value, uniformly distributed between 0
and the random backoff delay parameter. If after
T
delay
ms the line is still idle, then the
MFC-202/P begins transmission.
Parameter
:
Insert Inter-frame Gap
Options
: Never, Always.
Description
: The DNP3 specification states that no inter-frame gaps are required. How-
ever, some masters have been observed to drop frames when no inter-frame gaps are pro-
vided. This option allows communicating with such non-compliant devices. We discourage
its use, given that the forced inter-frame gap implies a forced backoff-delay.