Siemens MICROMASTER 420 - Page 48

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MICROMASTER 420 Reference Manual
40 Issue A1
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Figure 3-1 Typical RS485 Multidrop Interface........................................................................................42
Figure 3-2 Telegram Structure...............................................................................................................43
Figure 3-3 Address (ADR) Bit Numbers.................................................................................................44
Figure 3-4 Useful Data Characters ........................................................................................................44
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Table 3-1 Defined Task ID....................................................................................................................47
Table 3-2 Defined Reply ID ..................................................................................................................47
Table 3-3 Defined Error Values for Reply ID = Task cannot be executed ............................................48
Table 3-4 PZD Area Structure ..............................................................................................................51
Table 3-5 Inverter Control Word (STW)................................................................................................52
Table 3-6 Inverter Status Word (PZD)..................................................................................................53
Table 3-7 Practical Examples...............................................................................................................54
Table 3-8 Comparison Table (MICROMASTER 420/Earlier MICROMASTER)....................................58
Table 3-9 Assignment of the PROFIBUS SUB-D socket connector .....................................................63
Table 3-10 Maximum Cable Lengths for Data Transfer Rates................................................................63
Table 3-11 Order Numbers for Connectors and Cables .........................................................................63
Table 3-12 Technical data ......................................................................................................................64
Table 3-13 PROFIBUS Ordering information..........................................................................................64