© Microhard Systems Inc.
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6.0 Configuration
Values
S116
Character Timeout
1/4 Characters
0-255
10 (2.5 character time)
This ‘timer’ looks for gaps in the data being received
from the local attached device. The timer is activated
after the Minimum Packet Size (S111, default 1 Byte)
has been accumulated in the modem, after, if the timer
detects a gap in the data exceeding the Character
Timeout value, the modem will transmit the data.
The Nano will accumulate data in its buffers until either (a) Maximum Packet size
(S112) has been accumulated, or (b) Minimum Packet Size (S111) has been
accumulated AND the Character timeout has expired—whichever occurs first.
If S116 is set to 0, the modem will buffer exactly the Minimum Packet size and then
transmit that data.
Values
S118
Roaming
65535 full roaming
1-254 specific (fixed) unit
address with which to
associate
1
This feature allows a Remote unit to synchronize with a
specified ‘upstream’ unit (either Master or Repeater).
The options are as follows:
S118=65535: With this value in its S118 register, a
Remote will synchronize with an
upstream unit which has the same
network address (S104) and static mask
(S107) as the Remote. Should that
upstream unit fail, this Remote will
attempt to synchronize with another
’upstream’ unit within the same network.
This ability is particularly well-suited to
mobile applications.
When bench testing 3
modems for a Master-
Repeater-Slave link, be
sure to set the Slave’s
S118 to the UA of the
Repeater,
and
the
Repeater’s S118 to the
UA (1) of the Master.
This will ensure that data
is routed from the Slave
through the Repeater to
the Master; otherwise, if
the Slave’s S118 is left at
the default value of 1, the
Slave will communicate
directly with the Master,
bypassing the Repeater
altogether.
S118=1-254: In most static (fixed) networks, where there are no Repeaters, the
default value of 1 is maintained: All Slaves synchronize to the Master
(whose unit address is 1).
In networks where Repeaters are present, the value of a Remote’s S118 corresponds
to the particular upstream modem with which a particular Remote is intended to
communicate, e.g. Slave UA (S105)=3 may have an S118=2, where the modem with
UA 2 is a Repeater between the Slave and the Master; the Repeater will have an
S118=1.
S118 dictates which modem (by Unit Address (UA)) a Remote unit will ’look’ or
’attach to’ for its upstream signal path.
