RF Neulink NL5000 Rev B0 - Manual (Page 23)

NL5000 User Manual Rev B0 22
used with the carrier detect method of detecting a message and for the
NL5000 can be set to zero.
Message Retry Limit Number of times the unit will retransmit a message in
acknowledgement mode when an acknowledgement is not received.
Time Out Time The length of time in 26 ms increments that the unit will wait
for an acknowledgement when in acknowledgment mode.
Partial Packet Time Out The length of time in 26 ms increments that the
unit will wait for data from the host before sending a packet in those cases
where the transmit buffer is not full.
6.6.3.6
Terminal Mode
The terminal mode allows for direct control of the radio modem and its
memory map via a set of special proprietary commands. This mode is used
by RF Neulink for troubleshooting and for implementing special functions.
APPENDIX
A CONFIGURATION MODE W/O THE CONFIGURATION SOFTWARE
The NL5000 modem can be placed in Configuration mode without the
Configuration Software being connected if the user sends the same sequence of
characters to the modem that the Configuration Software does when it wishes to
place the unit in Configuration mode. After power-up, the modem should be sent a
sequence of three ASCII ‘+’ characters, each separated by 1 second in time. Note
that in Configuration mode, the modem will echo each character it receives while in
normal modem mode, it will not. The unit will stay in Configuration mode until
power is removed or until an ASCII *00<cr> is sent to reset the unit and take it out
of Configuration mode. Note: <cr> is the ASCII carriage return character.
B COMMANDING A CHANNEL CHANGE W/O THE CONFIGURATION
SOFTWARE
To force the modem to a particular programmed channel, the channel number
must be sent to the modem while it is in Configuration mode. This requires first that
the unit be placed in Configuration mode. See Appendix A for instructions for doing
this.
Before commanding that the modem go to a specific channel, it is sometimes
helpful to determine the default channel number for multi-channel modes. This
requires sending a command to read the particular address in the modem’s
memory which contains the current channel number. This is done by sending the
following ASCII sequence: