關(guān)于“表類型”的參數(shù)在首次掃描中設(shè)置。觸點(diǎn)10-PRES,當(dāng)置位時,將表示V0故障表中含有-故障輸人數(shù)據(jù)。故障邏輯置-故摩于故障表之后,PLC CPU將在掃描中令常開點(diǎn)置位。如果在兩次連續(xù)掃描過程中,故障放人故障表中,則常開觸點(diǎn)為兩個連續(xù)掃描置位。本例中使用一個存貯在%R0600的參敷塊。在SVCREQ功能模塊執(zhí)行之后,參數(shù)塊的第四、第五第六個字中包含有發(fā)生故障的/0模塊的地址。
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