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ICP DAS, MDC-211-ZT user manual , v1.0 Page 33
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Frame Type
ZigBee Frame
Type
Broadcast or unicast
Only the ZigBee coordinator need to be set
The "Frame Type" parameter in Table 4.1 is the packet type for the wireless data
transmission. In general, please select "Broadcast"; but in some case of the communication
range is small and the number of nodes is large, select the "Unicast" can reduce the data
traffic of the ZigBee wireless network and thus improve communication efficiency, as shown
in Figure 4.1.
Note 4.1: If using ZT-2551/ZT-2571 modules to connect Modbus RTU devices in the
ZigBee network, be sure to set the "Frame Type" parameter of MDC-211-ZT to
“Broadcast”.
Figure 4.1 The star topology on the left figure is suitable to use the unicast packet;
the tree/mesh topology on the right figure is suitable to use the broadcast packet.
C
R
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R
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R
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R
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