Murata HN-210 Manual page 45

Set Packet Attempts Limit
If ARQ Mode is set to 0, sets the number of times the radio will attempt to send an
unsuccessful transmission before discarding it. If ARQ Mode is set to 1, it is the
number of times every transmission will be sent, regardless of success or failure of a
given attempt. When this parameter is set to FFH, RF flow control mode is entered
for transmissions from the radio (See Section 2.3.4). This mode can be entered for
one or both radios in a point-to-point system. Using this mode in a point-to-multipoint
system will stop transmissions to all radios when any one radio has a full buffer.
Set Data Transmit Delay
When used in conjunction with the minimum data length parameter, this sets the
amount of time from the receipt of a first byte of data from the host until the radio
will transmit in transparent mode. Default is 00H which causes transmission to occur
without any delay. When a host is sending a group of data that needs to be sent
together, setting this parameter will provide time for the group of data to be sent by
the host before the radio transmits. If the length of data to be sent together is longer
than the time slot can send, the data will not be sent together but will be broken up
over multiple hops. The length of time the radio will wait is equal to the specified
value times the hop duration.
Set Slot Assignment Mode (base station only)
Sets whether the base station will assign remote transmit slots dynamically, based on
the number of remotes currently registered or whether the base station will assign
remote transmit slots statically, based on the maximum number of remotes parameter.
If static slot assignment is selected, make sure maximum number of remotes is
correctly set. Otherwise remote transmit performance will suffer as transmit time will
be reserved for remotes that may not exist. The dynamic assignment mode will
generally be preferred; however, the static assignment mode will result in a static
maximum data length parameter.
Set Base Slot Size (base station only)
Sets the amount of time allocated for transmission on each hop for the base station
time slot in 69.4µs increments, corresponding to 4 bytes per unit. Maximum value is
34H which corresponds to 208 bytes. If using a protocol mode, attempting to send a
packet with a length longer than this setting will cause the packet to be discarded.
Set ARQ Mode
Sets ARQ mode when set to 0 which is the default. In this mode the radio will resend
an unsuccessful transmission until either successful or packet attempt limit attempts
have been made. When set to 1 selects redundant transmit mode that will send every
transmission packet attempt limit times regardless of success or failure of any given
attempt. When redundant transmit mode is used, receiving radios will discard all
subsequent retransmissions once the transmission has been successfully received.
Thus the receiving host will receive just one copy of the transmission.
Copyright © Murata Manufacturing Co., Ltd. All Rights Reserved. 2004
HN-210/210X 01/13/17 45 of 58
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