Advanced Parameters; Physical Layer - Motorola MOSCAD 68P02958C00-B User Manual

Advanced Parameters

This section reviews all of the ToolBox advanced configuration parameters. Throughout the
ToolBox, advanced parameters are displayed according to context. For example, when you
click the Advanced tab in the WorkSpaceBar in Site Configuration, ToolBox shows only those
parameters that are applicable to the selected configuration. For details on opening the
Advanced parameters windows, see WorkSpaceBar Advanced Tab.
Some of the parameters listed here are applicable to the new version only. If you open an older
configuration file and decide not to change the version, ToolBox grays (hides) those
parameters that cannot be used in that version.
For each parameter, ToolBox dialog boxes provide three values: the minimum, the maximum
and the default. The range is specified between < > symbols. For example, <1-200> means that
the value can be a number between 1 through 200. You can specify a value greater than the
maximum value, in which case the system only issues a warning message. Exceeding the range
may consume additional memory and may cause unexpected or incorrect behavior in the RTU.
The default is automatically entered in the parameter field and appears between square
brackets (for example: [80]). You can change this value.
The default value provided in the parameter specifications below, is one of the possible values.
The default changes according to Port Type.

Physical layer

This section reviews the parameters through which you can control the functioning of the
Physical Layer.
Number of idles to announce 'End of RX' <1-200>
In UART communications without a channel access mechanism, a period of silence notifies all
layers above Physical that reception has ended. This period is calculated in terms of idles
which are converted to time as a function of the data speed. The system uses this value or the
value specified in the second field (and NOT more...), whichever is the smallest.
The value is equivalent to the time required to receive 1.5 frames (as defined in the MDLC
advanced parameter Unformatted adapter buffer size). The system uses this value or the value
specified in the second field, whichever is the greatest.
The parameter has no meaning when a channel access mechanism is used (such as RS-485 and
Darcom radio).
Interval between Link TX retries <100-6000>
The interval of time that should elapse before a data frame for which no ACK was received, is
retransmitted.
Number of bits for staggering <2-8>
This parameter is related to the slotted access mechanism used by the channel access sub-layer
of MDLC. A value of n means that an RTU will wait at most 2
and NOT more than <10-2000> mSec
5-39
Site Configuration
[80]:
[500]:
[500]:
[4]:
n
free slots before transmitting.