描述
本指令使用的操作数有：01000~01915、20000~25515、HR0000~HR1915，其功能相当于锁存器，当置位端（S端）条件为ON时，KEEP继电器一直保持ON状态，即使S端条件变为OFF，KEEP继电器也还保持ON，，直到复位端（R端）条件为ON时，才使之变OFF，KEEP指令主要用于线圈的保持，即继电器的自锁电路可用KEEP指令实现。若SET端和RES端同时为ON，则KEEP继电器优先变为OFF。锁存继电器指令编写必须按置位行（S端），复位行（R端）和KEEP继电器的顺序来编写。
E1R1 Fireye Infrared Auto-Check Flame Amplifier Module
One-day shipping available
Fireye U.V. Flame Scanner UV1A3-B
Fireye Programmer Module EP160 0436-40 w/Manual
Fireye UV1A3 UV scanner, 1/2 NPT NEW IN BOX
Expedited shipping available
FIREYE 4-263-1 NSFP 42631
FIREYE ED500 DISPLAY MODULE
FIREYE SIMULATOR C5000-C5099
FIREYE MEUVS4 NEW
FIREYE 4 314 1 UV BULB NEW BOXED
NEW FIREYE UV1A3 ULTRAVIOLET FLAME MONITOR
One-day shipping available
Fireye 129-2 Spare Tube Kit New
FIREYE ED560 DISPLAY MODULE
