ICP DAS, ZT-2570/ZT-2571 User Manual, Version 1.3
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Copyright @ 2013 by ICP DAS Co., Ltd. All Rights Reserved.
4.5.2.
Modbus RTU communication
Application Mode
Transparent Mode and Gateway Mode are available to be used in Modbus RTU
data transmission. The only difference is that the two modes use different type
transmission packets.
In Transparent Mode, the benefit of broadcasting is easy to use, there is not any
particular limitation to use this application mode. The only drawback is that the
data throughput of ZigBee network will be reduced with the number of ZigBee
routers in the ZigBee network increased, in order to ensure data transmitted to
every ZigBee nodes so that the transfer time will be much longer than using
unicast frame.
In Gateway Mode, the benefit of unicasting is that the loading of ZigBee network
will be reduced. But there are some issues need to be considered, please refer
the
Advanced Configuration - Frame Type
for more details as below.
ZT-2550
ZT-2570
ZT-2551
ZT-2571
備註
Application Mode
Transparent Transparent
Not any special limitation
Gateway
Gateway
Refer
Advanced Configuration - Frame
Type
ZT-20xx
(MBRTU)
ZT-2550 / ZT-2570
ZT-2551 / ZT-2571
M-7000
(MBRTU)
MBRTU
MBRTU
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