Siemens SINUMERIK 802C, Manual

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Start-Up
4.3 Starting up the PLC
4-61
SINUMERIK 802C
6FC5 597–3AA20–0BP2 (01.02)
Table 4-10 , FortsetzungSpecial Flag SM Bit Definition
SM Bits Description
SM 0.3 POWER ON: first PLC cycle ‘1’, following cycles ‘0’
SM 0.4 60 s cycle (alternating ‘0’ for 30 s, then ‘1’ for 30 s)
SM 0.5 1 s cycle (alternating ‘0’ for 0.5 s, then ‘1’ for 0.5 s)
SM 0.6 PLC cycle (alternating, one “0” cycle, then one “1” cycle)
4.3.6 Instruction set
A detailed description of the instructions is to be found in the help system of the PLC 802 Pro-
gramming Tool (Help > Contents and Index, “SIMATIC LAD Instructions”) and in the Docu-
mentation “S7–200 Automation System, CPU22x System Manual.