and the Slaves. The Slaves communicating through this Repeater will only receive the initial
packet from the Master with no repeats. Therefore, if the packet is not received on the first try,
the Slave will not respond as expected.
l Long data type
Where to find:
l Settings Editor tab in Device Configuration Utility: RF451 > Master Packet Repeat
10.4.74.20 RadioRepeaters
In a MultiPoint network it is critical to transmission timing to configure this setting correctly.
Check this box if there are any Repeaters in the network. This setting should be set to the same
value in all transceivers in a MultiPoint network. Note, this option should be checked when
running Diagnostics from the Master.
l Long data type
Where to find:
l Settings Editor tab in Device Configuration Utility: RF451 > Repeaters Used
10.4.74.21 RadioRetryOdds
While packets transmitted from the Master to the Slaves in a MultiPoint network are not
acknowledged, packets transmitted from Slaves to the Master are acknowledged. It is possible
that more than one Slave will attempt to transmit to the Master at the same time. Therefore, it is
important that a protocol exists to resolve contention for the Master between Slaves.
This is addressed through RadioSlaveRetry and RadioRetryOdds. Once the Slave has
unsuccessfully attempted to transmit the packet the number of times specified in
RadioSlaveRetry, it will attempt to transmit to the Master on a random basis. RadioRetryOdds
determines the probability that the Slave will attempt to retransmit the packet to the Master; a
low setting will assign low odds to the Slave attempting to transmit. Conversely, a high setting
will assign higher odds. For example, this setting might be used when considering two different
Slaves in a MultiPoint network, one with a strong RF link, and the other with a weak RF link to
the Master. Assigning a higher RadioRetryOdds to the Slave with the weaker link gives it a better
chance of competing with the closer Slave(s) for the Master's attention. When RadioRetryOdds =
0, after the Slave has exhausted the number of retries set in RadioSlaveRetry and still not gained
the Master’s attention, the Slave’s data buffer will be purged, and no further attempts will be
made.
l Long data type
10. Information tables and settings (advanced) 201
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