RELIANCE 45C340模擬PLC輸入模塊卡
時(shí)間報警寄存器寄存器3、5和7是時(shí)間報警寄存器，其格式分別與寄存器2、4和6相似。寄存器3、5和7的位7是掩碼位。掩碼位激活時(shí)（邏輯一（1）），禁止在確定日時(shí)報警時(shí)使用特定的日時(shí)報警寄存器（見(jiàn)表4-13）。當所有掩碼位均為低（0）時(shí)，當寄存器2、4和6與寄存器3、5和7中的值匹配時(shí)，將發(fā)生報警。當寄存器7的掩碼位設置為邏輯1（1）時(shí)，在確定一天中的時(shí)間報警時(shí)，寄存器6將被忽略，并且每天都會(huì )發(fā)生報警。當寄存器7和5的掩碼位設置為邏輯1（1）時(shí)，寄存器6和4將在確定一天中的時(shí)間報警時(shí)被忽略，并且每小時(shí)將發(fā)生一次報警。當寄存器7、5和3的掩碼位設置為邏輯一（1）時(shí)，寄存器6、4和2將在確定一天中的時(shí)間報警時(shí)被忽略，并且每分鐘會(huì )發(fā)生一次報警（當寄存器1的秒從59步進(jìn)到00時(shí)）。
Time of Day Alarm Registers Registers 3, 5, and 7 are the Time of Day Alarm registers and are formatted similar to Register 2, 4, and 6 respectively. Bit 7 of registers 3, 5, and 7 is a mask bit. The mask bits, when active (logic one (1)), disable the use of the particular Time of Day Alarm register in the determination of the Time of Day Alarm (see Table 4-13). When all the mask bits are low (0) an alarm will occur when Registers 2, 4, and 6 match the values found in Registers 3, 5, and 7. When Register 7’s mask bit is set to a logic one (1), Register 6 will be disregarded in the determination of the Time of Day alarm and an alarm will occur everyday. When Registers 7 and 5’s mask bit is set to a logic one (1), Register 6 and 4 will be disregarded in the determination of the Time of Day alarm and an alarm will occur every hour. When Registers 7, 5 and 3’s mask bit is set to a logic one (1), Register 6, 4, and 2 will be disregarded in the determination of the Time of Day alarm and an alarm will occur every minute (when register 1’s seconds step from 59 to 00).
