斷開延時(shi)(shi)(shi)型定(ding)(ding)時(shi)(shi)(shi)器：當(dang)輸入(ru)條(tiao)件00000為(wei)(wei)ON時(shi)(shi)(shi)無(wu)延時(shi)(shi)(shi)作用(yong)，只有在輸入(ru)條(tiao)件00000為(wei)(wei)OFF時(shi)(shi)(shi)產(chan)生延時(shi)(shi)(shi)作用(yong)。它在SIEMENS的PLC中(zhong)又被稱為(wei)(wei)SF型定(ding)(ding)時(shi)(shi)(shi)器。

接通延時(shi)型定(ding)時(shi)器：是(shi)各種(zhong)PLC中常見的(de)基本(ben)的(de)定(ding)時(shi)器，這種(zhong)定(ding)時(shi)器在SIEMENS的(de)PLC中，稱(cheng)為SD型定(ding)時(shi)器。

保持型(xing)接通延時(shi)定時(shi)器(qi)(qi)：又稱SS型(xing)定時(shi)器(qi)(qi)，是當輸(shu)入(ru)條(tiao)件(jian)00000為ON后(hou)，即(ji)產生鎖存功能，即(ji)使輸(shu)入(ru)條(tiao)件(jian)00000又變(bian)為OFF，仍(reng)視輸(shu)入(ru)條(tiao)件(jian)為ON，當定時(shi)器(qi)(qi)的(de)當前值(zhi)等于設定值(zhi)時(shi)，定時(shi)器(qi)(qi)動作(zuo)。

脈沖型定(ding)時(shi)(shi)(shi)器(qi)(qi)(qi)：當輸入條件(jian)00000為ON后(hou)，定(ding)時(shi)(shi)(shi)器(qi)(qi)(qi)即(ji)時(shi)(shi)(shi)動作，但(dan)經過定(ding)時(shi)(shi)(shi)器(qi)(qi)(qi)所設定(ding)的(de)時(shi)(shi)(shi)間后(hou)，即(ji)使輸入條件(jian)00000仍為ON，定(ding)時(shi)(shi)(shi)器(qi)(qi)(qi)卻變為OFF狀(zhuang)(zhuang)態(tai)。即(ji)這種定(ding)時(shi)(shi)(shi)器(qi)(qi)(qi)ON狀(zhuang)(zhuang)態(tai)的(de)維持時(shi)(shi)(shi)間是由(you)設定(ding)值決定(ding)的(de)。如果00000為ON的(de)時(shi)(shi)(shi)續(xu)時(shi)(shi)(shi)間小于(yu)定(ding)時(shi)(shi)(shi)器(qi)(qi)(qi)的(de)設定(ding)值，定(ding)時(shi)(shi)(shi)器(qi)(qi)(qi)的(de)ON狀(zhuang)(zhuang)態(tai)維持時(shi)(shi)(shi)間為輸入條件(jian)00000為ON的(de)持續(xu)時(shi)(shi)(shi)間。這種定(ding)時(shi)(shi)(shi)器(qi)(qi)(qi)在SIEMENS的(de)PLC中，稱為SP型定(ding)時(shi)(shi)(shi)器(qi)(qi)(qi)。

擴張型脈(mo)沖(chong)定(ding)時(shi)器(qi)(qi)(qi)(qi)：這(zhe)種定(ding)時(shi)器(qi)(qi)(qi)(qi)與(yu)(yu)脈(mo)沖(chong)型定(ding)時(shi)器(qi)(qi)(qi)(qi)的(de)區別(bie)是，只要輸(shu)入條件00000出(chu)現了ON狀態，不(bu)管其持續時(shi)間多(duo)長，均可(ke)使定(ding)時(shi)器(qi)(qi)(qi)(qi)為ON的(de)維持的(de)時(shi)間與(yu)(yu)定(ding)時(shi)器(qi)(qi)(qi)(qi)的(de)設定(ding)值(zhi)一致(zhi)。這(zhe)種定(ding)時(shi)器(qi)(qi)(qi)(qi)在SIEMENS的(de)PLC中，稱為SE型定(ding)時(shi)器(qi)(qi)(qi)(qi)。