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کامپیوتر و شبکه::
واحد دادههای کاربردی
The modBus Application Data Unit (ADU) is maximum 260 Bytes
Figure 2.5 shows the complete ModBus ADU which contains the following
Figure 2.5: ModBus TCP Application Data Unit
S7 ADU consists in a S7 PDU wrapped in TPKT [46] and ISO-COTP protocol
S7 Application Data Unit 4 Additional Routing Data S7 Protocol Data Unit
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