斷開延時(shi)(shi)型定(ding)時(shi)(shi)器:當輸入條(tiao)件00000為ON時(shi)(shi)無延時(shi)(shi)作用(yong),只有(you)在(zai)(zai)輸入條(tiao)件00000為OFF時(shi)(shi)產生延時(shi)(shi)作用(yong)。它在(zai)(zai)SIEMENS的(de)PLC中又被稱為SF型定(ding)時(shi)(shi)器。
接(jie)通延時(shi)型定(ding)(ding)時(shi)器(qi):是各種PLC中常見的基(ji)本的定(ding)(ding)時(shi)器(qi),這種定(ding)(ding)時(shi)器(qi)在SIEMENS的PLC中,稱為SD型定(ding)(ding)時(shi)器(qi)。
保(bao)持型接通延(yan)時(shi)定時(shi)器:又(you)稱SS型定時(shi)器,是(shi)當輸(shu)入條件00000為(wei)ON后,即(ji)產生鎖存功(gong)能,即(ji)使輸(shu)入條件00000又(you)變(bian)為(wei)OFF,仍視輸(shu)入條件為(wei)ON,當定時(shi)器的當前值等于設定值時(shi),定時(shi)器動作。
脈沖型定(ding)時(shi)(shi)(shi)(shi)器:當輸入(ru)(ru)條(tiao)件(jian)(jian)00000為(wei)ON后,定(ding)時(shi)(shi)(shi)(shi)器即(ji)時(shi)(shi)(shi)(shi)動作,但經過定(ding)時(shi)(shi)(shi)(shi)器所設(she)(she)定(ding)的(de)時(shi)(shi)(shi)(shi)間(jian)(jian)后,即(ji)使(shi)輸入(ru)(ru)條(tiao)件(jian)(jian)00000仍(reng)為(wei)ON,定(ding)時(shi)(shi)(shi)(shi)器卻變為(wei)OFF狀態。即(ji)這種(zhong)定(ding)時(shi)(shi)(shi)(shi)器ON狀態的(de)維持(chi)時(shi)(shi)(shi)(shi)間(jian)(jian)是由設(she)(she)定(ding)值決(jue)定(ding)的(de)。如果00000為(wei)ON的(de)時(shi)(shi)(shi)(shi)續時(shi)(shi)(shi)(shi)間(jian)(jian)小于定(ding)時(shi)(shi)(shi)(shi)器的(de)設(she)(she)定(ding)值,定(ding)時(shi)(shi)(shi)(shi)器的(de)ON狀態維持(chi)時(shi)(shi)(shi)(shi)間(jian)(jian)為(wei)輸入(ru)(ru)條(tiao)件(jian)(jian)00000為(wei)ON的(de)持(chi)續時(shi)(shi)(shi)(shi)間(jian)(jian)。這種(zhong)定(ding)時(shi)(shi)(shi)(shi)器在SIEMENS的(de)PLC中,稱為(wei)SP型定(ding)時(shi)(shi)(shi)(shi)器。
擴(kuo)張(zhang)型(xing)脈沖(chong)定(ding)(ding)時(shi)(shi)器(qi):這種(zhong)定(ding)(ding)時(shi)(shi)器(qi)與脈沖(chong)型(xing)定(ding)(ding)時(shi)(shi)器(qi)的區別是,只要輸(shu)入條件00000出現(xian)了(le)ON狀態,不管其持續(xu)時(shi)(shi)間(jian)多(duo)長(chang),均可使定(ding)(ding)時(shi)(shi)器(qi)為(wei)ON的維持的時(shi)(shi)間(jian)與定(ding)(ding)時(shi)(shi)器(qi)的設定(ding)(ding)值一致。這種(zhong)定(ding)(ding)時(shi)(shi)器(qi)在SIEMENS的PLC中,稱(cheng)為(wei)SE型(xing)定(ding)(ding)時(shi)(shi)器(qi)。