第5章2 s7200指令系統(tǒng)

S7-200PLC指令系統(tǒng)-2二.定時(shí)器指令輸入接點(diǎn)設(shè)定值:1~32767定時(shí)器號(hào)碼（0～255）INPTT37TON定時(shí)器分辨率（時(shí)基）有三種：1ms、10ms、100ms。定時(shí)器的分辨率由定時(shí)器號(hào)決定定時(shí)器的實(shí)際設(shè)定時(shí)間T=設(shè)定值PT×分辨率TON：接通延時(shí)定時(shí)器

TOF：斷開(kāi)延時(shí)定時(shí)器

TONR：有記憶接通延時(shí)定時(shí)器類型TS=1200*0.1=120S延時(shí)接通定時(shí)器TON其工作波形圖如下：I0.1Q0.1計(jì)時(shí)值設(shè)定值TS設(shè)定值使能輸入TONPTINT38T38TONPTINI0.1120()T38Q0.1延時(shí)斷開(kāi)定時(shí)器TOF其工作波形圖如下：I0.1Q0.1計(jì)時(shí)值設(shè)定值TS設(shè)定值使能輸入TOFPTINT38TOFPTINI0.1120T38()T38Q0.1TS=1200*0.1=120S保持型定時(shí)器TONR其工作波形圖如下：輸入端I0.1Q0.1當(dāng)前值設(shè)定值TSTS=120*10msT4M0.1輸入端設(shè)定值TONRPTINTONRPTINI0.1120T4()T4Q0.1()T4R1M0.1最大值32767120①1ms分辯率定時(shí)器每隔1ms刷新一次，刷新定時(shí)器位和定時(shí)器當(dāng)前值，在一個(gè)掃描周期中要刷新多次，而不和掃描周期同步。②10ms分辯率定時(shí)器10ms分辯率定時(shí)器啟動(dòng)后，定時(shí)器對(duì)10ms時(shí)間間隔進(jìn)行計(jì)時(shí)。程序執(zhí)行時(shí)，在每次掃描周期的開(kāi)始對(duì)10ms定時(shí)器刷新，在一個(gè)掃描周期內(nèi)定時(shí)器位和定時(shí)器當(dāng)前值保持不變。

③100ms分辨率定時(shí)器100ms定時(shí)器啟動(dòng)后，定時(shí)器對(duì)100ms時(shí)間間隔進(jìn)行計(jì)時(shí)。只有在定時(shí)器指令執(zhí)行時(shí)，100ms定時(shí)器的當(dāng)前值才被刷新。自復(fù)位式的定時(shí)器的用法T33錯(cuò)誤正確正確但不好好!!!T33T33T33T33IN+30Q0.0PTTONT37T37T37三相籠型異步電動(dòng)機(jī)Y-△減壓起動(dòng)控制電路KT1、KM3和KM1吸合，定時(shí)3秒2、定時(shí)時(shí)間到，KM2和KM1吸合3、KM2和KM3互相閉鎖三相籠型異步電動(dòng)機(jī)Y-△減壓起動(dòng)控制電路KM1M3~KM2V1W1U1W2U2V2KM3L3L1L2QF1LQ0.0Q0.1Q0.2Q0.31MI0.0I0.1I0.2I0.3KM2FRSB1SB2KM3FRKM1FR停止啟動(dòng)Designbasedonexperience1、KM3和KM1吸合，定時(shí)3秒2、定時(shí)時(shí)間到，KM2和KM1吸合3、KM2和KM3互相閉鎖Q0.0Q0.0KM1停止I0.0I0.1Network1Q0.0Network2T40+30ENTONPTNetwork3Q0.1T40Q0.0Q0.2Network4T40Q0.1Q0.2KM3KM2Designbasedonexperience1、KM3和KM1吸合，定時(shí)3秒2、定時(shí)時(shí)間到，KM2和KM1吸合3、KM2和KM3互相閉鎖Q0.0Q0.0KM1停止I0.0I0.1Network1T40+30ENTONPTNetwork2Q0.1T40Q0.0Q0.2T40Q0.1Q0.2KM2I0.0Q0.0I0.1I0.2Q0.1I0.3I0.4StopbuttonLcontactorKM1RightbuttonLeftbuttonLeftlimitswitchRightlimitswitchKM2RcontactorI0.1I0.0Q0.0Q0.1例子:小車自動(dòng)往返控制

要求：當(dāng)左行或右行按鈕接通時(shí)，小車在限位開(kāi)關(guān)I0.1和I0.0之間自動(dòng)往返運(yùn)動(dòng)，當(dāng)按停止按鈕I0.2時(shí)立即停止。

小車到達(dá)限位開(kāi)關(guān)時(shí)，停止10秒鐘做裝卸操作。

DesignbasedonexperienceI0.4Q0.0I0.3Q0.1I0.0I0.2右啟Q0.0LeftLeftbuttonRight左限位StopRightlimitT37I0.1？DesignbasedonexperienceQ0.1I0.1I0.2RightI0.4Q0.0右啟Left右限位StopI0.3Q0.1RightbuttonT38LeftlimitI0.0T38左右限位不能停止？DesignbasedonexperienceM0.0M0.0I0.4標(biāo)志停止I0.2I0.3設(shè)置運(yùn)行/停止標(biāo)志位DesignbasedonexperienceI0.4Q0.0I0.3Q0.1I0.0I0.2右啟Q0.0LeftLeftbuttonRight左限位StopRightlimitM0.0標(biāo)志T37I0.1DesignbasedonexperienceQ0.1I0.1I0.2RightI0.4Q0.0右啟Left右限位StopM0.0標(biāo)志I0.3Q0.1RightbuttonT38LeftlimitI0.0T38例:用定時(shí)器實(shí)現(xiàn)順序啟動(dòng)有三條帶式輸送機(jī),啟動(dòng)時(shí)要求按下啟動(dòng)按鈕I0.0時(shí),KM1先啟動(dòng),20秒后KM2啟動(dòng),再過(guò)40秒KM3啟動(dòng).KM1KM3KM2SB1I0.0//啟動(dòng)按鈕SB2I0.1//停止按鈕1LQ0.0Q0.1Q0.2Q0.31MI0.0I0.1I0.2I0.3KM2FRSB1SB2KM3FRKM1FRLDI0.0SKM1,1RM0.1,1LDT39SKM2,1T40KM3T39KM2I0.0KM1IN+600T40PTTONKM1+200T39S1SS11LDKM1TONT39,+200TONT40,+600LDT40SKM3,1M0.1R1INPTTONLDI0.1RKM3,1SM0.1,1LDT41RKM2,1T42KM1T41KM2I0.1KM3IN+600T42PTTONM0.1+400T41R1RR11LDNKM3TONT41,+400TONT42,+600LDT42RKM1,1M0.1S1INPTTONRS競(jìng)爭(zhēng)!LDI0.0SKM1,1RM0.1,1LDT39ANM0.1SKM2,1I0.0KM1S1IN+600T40PTTONKM1+200T39LDKM1TONT39,+200TONT40,+600LDT40ANM0.1SKM3,1M0.1R1INPTTON更好地改進(jìn)T39KM2S1M0.1T40KM3S1M0.1LDI0.1RKM3,1SM0.1,1LDT41AM0.1RKM2,1I0.1KM3IN+600T42PTTONM0.1+400T41R1LDNKM3TONT41,+400TONT42,+600LDT42AM0.1RKM1,1M0.1S1INPTTONT41KM2R1M0.1T42KM1R1M0.1更好地改進(jìn)LDI0.0OM0.0ANI0.1=M0.0T38LDM0.0TONT38,+200TONT39,+600IN+600T39PTTONM0.0+200INPTTON方法2M0.0M0.0I0.0I0.1LDI0.1OM0.1ANI0.0=M0.1M0.1I0.1I0.0M0.1T40LDM0.1TONT40,+400TONT41,+600IN+600T41PTTONM0.1+400INPTTON方法2KM2T38T40KM1M0.0T41LDM0.0ANT41=KM1LDT38ANT40=KM2LDT39ANM0.1=KM2KM3T39M0.1例:用定時(shí)器實(shí)現(xiàn)繞線電動(dòng)機(jī)啟動(dòng)KM1L3L1L2QFM3~KM2KM4KM3KM6KM51、KM1吸合，串入所有電阻；2、0.5秒后KM2吸合切除第一級(jí)電阻；3、3秒后KM3吸合切除第二級(jí)電阻；4、2秒后KM4吸合切除第三級(jí)電阻；5、1.5秒后KM5吸合切除第四級(jí)電阻；6、0.8秒后KM6吸合切除全部電阻；例:用定時(shí)器實(shí)現(xiàn)繞線電動(dòng)機(jī)啟動(dòng)SB1I0.0//啟動(dòng)按鈕SB2I0.1//停止按鈕1MI0.0I0.1I0.2I0.3SB1SB21LQ0.0Q0.1Q0.2Q0.3KM2FRKM3FRKM1FRKM4FR2LQ0.4Q0.5Q0.6Q0.7KM6FRKM5FRI0.4I0.5I0.6I0.7I1.0LDI0.0SKM1,1I0.0KM1IN+35T40PTTONKM1S1LDKM1TONT33,+50TONT40,+35TONT41,55TONT42,70TONT43,78+50T33INPTTONIN+55T41PTTONIN+70T42PTTONIN+78T43PTTON?!T43KM6S1T40KM3S1LDT33SKM2,1LDT41SKM4,1T33KM2S1T42KM5S1T41KM4S1LDT40SKM3,1LDT42SKM5,1LDT43SKM6,1?!三.計(jì)數(shù)器指令定時(shí)器是對(duì)PLC內(nèi)部的時(shí)鐘脈沖進(jìn)行計(jì)數(shù)，而計(jì)數(shù)器是對(duì)外部的或由程序產(chǎn)生的計(jì)數(shù)脈沖進(jìn)行計(jì)數(shù)。當(dāng)前值：計(jì)數(shù)器累計(jì)計(jì)數(shù)的當(dāng)前值（16位有符號(hào)整數(shù)），它存放在計(jì)數(shù)器的16位（bit）當(dāng)前值寄存器中。每個(gè)計(jì)數(shù)器只有一個(gè)16位的當(dāng)前值寄存器地址。在一個(gè)程序中，同一計(jì)數(shù)器號(hào)不要重復(fù)使用，更不可分配給幾個(gè)不同類型的計(jì)數(shù)器。增計(jì)數(shù)器設(shè)定值:-32768~32767CUPVC20CTUR復(fù)位計(jì)脈沖數(shù)I0.2I0.3C20當(dāng)前值C20計(jì)數(shù)器位增/減計(jì)數(shù)器增計(jì)數(shù)減計(jì)數(shù)復(fù)位C(0~255)I1.0I1.1I1.2當(dāng)前值輸出端預(yù)設(shè)值減計(jì)數(shù)器CDPVC(0~255)CTDLD復(fù)位，裝設(shè)定值計(jì)脈沖數(shù)I1.3I1.4當(dāng)前值輸出21計(jì)數(shù)器當(dāng)前值等于0時(shí)，停止計(jì)數(shù)，同時(shí)計(jì)數(shù)器位被置位“1”設(shè)定值例.計(jì)數(shù)器應(yīng)用舉例：

產(chǎn)品數(shù)量檢測(cè)產(chǎn)品通過(guò)檢測(cè)器PH機(jī)械手KM1KM2傳送帶電機(jī)PLC的I/O分配：I0.0—傳送帶起動(dòng)按鈕I0.1—傳送帶停機(jī)按鈕I0.2—產(chǎn)品通過(guò)檢測(cè)器PHQ0.0—傳送帶電機(jī)KM1Q0.1—機(jī)械手KM2T37—定時(shí)器,定時(shí)2秒C20—計(jì)數(shù)器，初始值24（每24個(gè)產(chǎn)品機(jī)械手動(dòng)作1次）機(jī)械手動(dòng)作后，延時(shí)2秒，將機(jī)械手電磁鐵切斷，同時(shí)將C20復(fù)位。C20復(fù)位后，Q0.1和T37也復(fù)位 T37電機(jī)起動(dòng)后，Q0.0產(chǎn)生寬度為一個(gè)掃描周期的正脈沖，使C20和T37復(fù)位起、停傳送帶電機(jī)計(jì)數(shù)器應(yīng)用舉例：產(chǎn)品數(shù)量檢測(cè)Q0.0Q0.0I0.224C20T37+20C20Q0.1每檢測(cè)到一個(gè)產(chǎn)品，I0.2產(chǎn)生一個(gè)正脈沖，使C20計(jì)一個(gè)數(shù)C20每計(jì)24個(gè)數(shù)，機(jī)械手動(dòng)作一次機(jī)械手動(dòng)作后，延時(shí)2秒，將機(jī)械手電磁鐵切斷，同時(shí)將C20復(fù)位。C20復(fù)位后，Q0.1和T37也復(fù)位 I0.0I0.1C20CUPVCTURINPTTONT37PQ0.0例:計(jì)數(shù)器應(yīng)用舉例__停車場(chǎng)計(jì)數(shù)器PLC的I/O分配：I0.0—進(jìn)車信號(hào)I0.1—出車信號(hào)I0.2—復(fù)位信號(hào)Q0.1—車位滿報(bào)警信號(hào)C48—計(jì)數(shù)器，初始值100例:計(jì)數(shù)器應(yīng)用舉例__停車場(chǎng)計(jì)數(shù)器I0.0+100C48Q0.1C48CUPVCTUDRCDI0.1I0.2Network1LDI0.0LDI0.1LDI0.2CTUDC48,+100Network2LDC48=Q0.1STL作業(yè)：某水泵房有三臺(tái)水泵，使用PLC進(jìn)行控制，啟動(dòng)按鈕和停止按鈕都只有一個(gè)，要求停止工作時(shí)，工作時(shí)間最長(zhǎng)的水泵先停，啟動(dòng)時(shí)休止時(shí)間最長(zhǎng)的水泵開(kāi)。SB1：停止按鈕SB2：?jiǎn)?dòng)按鈕1LQ0.0Q0.1Q0.2Q0.31MI0.0I0.1I0.2I0.3KM2FRSB1SB2KM3FRKM1FRQ0.0SM0.432000C0CUPVCTURQ0.0Q0.1SM0.432000C1CUPVCTURQ0.1Q0.2SM0.432000C2CUPVCTURQ0.2LDQ0.0ASM0.4LDNQ0.0CTUC0,32000LDQ0.1ASM0.4LDNQ0.1CTUC1,32000LDQ0.2ASM0.4LDNQ0.2CTUC2,32000接通時(shí)間Q0.0SM0.432000C10CUPVCTURQ0.0Q0.1SM0.432000C11CUPVCTURQ0.1Q0.2SM0.432000C12CUPVCTURQ0.2LDNQ0.0ASM0.4LDQ0.0CTUC10,32000LDNQ0.1ASM0.4LDQ0.1CTUC11,32000LDNQ0.