Instruction Manual
Chapter Four Configuration
Page 37
In fast operation mode, the master and slave modules continually communicate with each other
(even if there is no data) to minimize radio synchronizing time when data is to be transmitted.
You cannot use repeaters when using the
option. Unit address should be less than 15.
Low Power Mode
If “Low Power Mode” is selected, the
module will disconnect the
communications link and shutdown its
receiver circuits if the RS232 DTR signal
goes to a low or reset state. When the DTR
signal becomes high or active, then the
module will revert to normal operation.
Controlled Mode Options
For each controlled mode, there are some
options. In the “Advanced” page, there are
some timing parameters.
If you enter a “Link Check Time”, then the master unit will send a “check message” if the check
time has elapsed without any data transmissions. For example, if you enter 10 seconds, then if
there is a 10 second period without a data transmission, then the master module will transmit a
check message. If the slave does not acknowledge, then the master will transmit the check
message up to five times. If there is still no ACK, then the link will be reset (DCD reset).
If you enter an “Inactivity Timeout” value, then the 805U
will automatically reset the link if there has been no data
transmissions within this time. If you use the link check
feature, you should enter an “Inactivity Timeout” value to
reset the link at the slave unit.
It is a good idea to use these timers as it provides a higher
level of security for the controlled mode system (except for
“fast operation” systems). Normally a link check time will
be entered at the master unit (for example, 10 seconds), and
a inactivity timeout will be entered at the slave unit (for
example, 15 seconds). It is important that the inactivity
timeout is greater than the link check time.
A value of zero disables these parameters.
4.4.3 Other Parameters
Radio Data Rate
Select the radio data rate which you want to use. Note that
modules will only communicate with each other if they have
the same radio data rate. If you select a rate which is faster
than the serial rate, the WI-MOD-9-D will automatically set
WI-MOD-9-D Configuration
WI-MOD-9-D Configuration