Henny Penny KFC Velocity Series Service Manual page 120

• The Digi radio must have uninterrupted power from the fryer's control board.
• The fryer's control board must be able to communicate (pass data) bidirectionally with the
Digi Radio over the wired connection.
• The Digi radio must be able to convert data into the ZigBee network protocol.
• The Digi radio must be able to transmit wireless data using the ZigBee protocol.
• The Digi radio must be seen on the operator's network.
• The Digi radio must be able to Join the operator's OPS/QPM environment, which is KFC
specific.
Each of these steps can be a failure point.
6 6 . . 3 3 . . 2 2 D D i i g g i i Z Z i i g g B B e e e e R R a a d d i i o o B B a a s s i i c c s s
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Just because a Digi ZigBee radio module can hear transmissions from a ZigBee
network, it does not mean the radio module is part of that network. In fact, any
particular module may be able to hear transmissions from multiple ZigBee networks—
just as your laptop may hear transmissions from multiple wireless networks—though it
can connect to only one at a time, or might not be connected to any. When our
controls and radio modules leave Henny Penny, they are sent out in an U U n n j j o o i i n n e e d d
state, which means they are not a member of any particular network group. J J o o i i n n i i n n g g a
radio is the process of having it locate and join a particular ZigBee network.
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The radio must be manually invited by the OPS/QPM computer to join the store's
ZigBee network. The OPS/QPM computer screen lists all the nearby radio modules
that the network can communicate with and the operator selects a module and invites
it to join the network.
N N O O T T E E : There are options available in the ZigBee protocol to support an "auto-join"
feature, but KFC is currently manually joining new radios at this time.
Once joined to the network, the radio automatically reconnects to that same network
at each power up. Even if a fryer is unplugged and powered down for days, the radio
module remembers the network that it has been assigned to, and automatically
reconnects to it again the next time the fryer is plugged in.
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The Digi radio can be powered on but not communicating. The radio needs to
communicate with both the fryer's software (control board) and the operator's virtual
network in order to seamlessly pass data. As an example, the data can flow
successfully between the fryer and the Digi radio but never make it on to the
operator's virtual network, which inhibits the fryer's data from reaching the operator's
Smart Kitchen software. Conversely the data may never make it from the fryer to the
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