ABPLC/1747-M4/罗克韦尔

如图2a所示。步1的M1得电条件是受控机械原位开关X1处于压合状态（若受控机械有多个执行机构，则要求每个执行机构的原位开关均处于压合状态），满足原位条件后按起动按钮X0才能得电。M1得电后自锁，并为步2提供步进条件信号（M1的常开触点）。步1的执行动作完成时触发的行程开关信号X2作为步2的转步条件信号。步2的M2的输入满足其步进条件和转步条件后得电自锁，并为步3提供步进条件信号。按此规律即可实现后续每一工作步辅助继电器的得电和自锁。停止步M5的步进条件信号和转步条件信号分别为：较后一个工作步M4发出的步进条件信号（M4的常开触点）和该步动作完成时所触发的转步信号X1。由于M5的得电信号令控制系统失电，所以M5的回路不自锁，而且要将其常闭触点串联在步1回路的较左端。从步2起后续各个步的回路构成分支回路。一旦M5得电便使整个系统失电。如不用分支回路的结构，也可采用图3所示的回路。即把M5常闭触点分别串联在每步辅助继电器的回路上。应该注意的是：无论工作步还是停止步，如果某步的转步主令信号有多个，则应将多个转步主令信号互相串联。ALLEN BRADLEY 1747-L541 SLC 5/04
ALLEN BRADLEY 1747-L542 SLC 5/02 CPU, 4K USR MEMORY
ALLEN BRADLEY 1747-L542P 5/04P PROCESSER
ALLEN BRADLEY 1747-L543 CONTROLLER,64K MEMORY
ALLEN BRADLEY 1747-L551 CONTROLLER,64K MEMORY
ALLEN BRADLEY 1747-L552 CONTROLLER,64K MEMORY
ALLEN BRADLEY 1747-L553 CONTROLLER,64K MEMORY
ALLEN BRADLEY 1747-M1 EEPROM MEMORY MODULE,1K
ALLEN BRADLEY 1747-M11 SLC 5/03-5/04 EEPROM MEM MOD, 16K USR INSTRUCT,
ALLEN BRADLEY 1747-M12 MEMORY MODULE ALLEN BRADLEY 1747-M2 EPROM FOR 4K USR INSTRUCTION
ALLEN BRADLEY 1747-M15 EEPROM MEMORY,FOR 1747-M11,12
ALLEN BRADLEY 1747-M2 EEPROM MEMORY,4K
ALLEN BRADLEY 1747-M3 EEPROM MEMORY,4K
ALLEN BRADLEY 1747-M4 EEPROM MEMORY,4K
ALLEN BRADLEY 1747-M5 ADAPTER SOCKET-PKG. 5
ALLEN BRADLEY 1747-NP1 WALL MOUNT PWR SUPPLY 120V AC INPUT
ALLEN BRADLEY 1747-NP2 GLOBAL DESK TOP PWR SUPPLY 85/285 V AC IN
ALLEN BRADLEY 1747-OCAPINT WINDOWS NT API FOR 1771-OC MODULE
ALLEN BRADLEY 1747-OCDPDE OC DOC SET/GERMAN
ALLEN BRADLEY 1747-OCDPES OC DOC SET/SPANISH
ALLEN BRADLEY 1747-OCDPFR OC DOC SET/FRENCH
ALLEN BRADLEY 1747-OCDPIT OC DOC SET/ITATIAN
ALLEN BRADLEY 1747-OCDR16 16 MB DRAM FOR 1747 OPEN CONTROLLER
ALLEN BRADLEY 1747-OCDR32 32 MB DRAM FOR 1747 OPEN CONTROLLER
ALLEN BRADLEY 1747-OCDR4 4 MB DRAM TO 1747 OPEN CONTROLLER
ALLEN BRADLEY 1747-OCENET ETHERNET(10/100 BASET)MODULE
ALLEN BRADLEY 1747-OCF 266 MHZ OPEN CONTROL PROCESSOR
ALLEN BRADLEY 1747-OCFAN1 FAN ASSEMBLY FOR 1747 OPEN CONTROLLER
ALLEN BRADLEY 1747-OCIDE1 ATA CARRIER CARD/IDE DRIVE EXPANDER MODULE
ALLEN BRADLEY 1747-OCIDE25 2.5 IDE DRIVE EXPANSION MODULE
ALLEN BRADLEY 1747-OCKTX SINGLE CHANNEL 1-B COMM OPTION MODULE
ALLEN BRADLEY 1747-OCKTXD DUAL CHANNEL A-B COMM OPTION MODULE
ALLEN BRADLEY 1747-OCP252 PARALLEL ADAPTER CABLE