产品详细资料
在编程82C54时,只需遵循两个规则。1.对于每个计时器,必须首先写入控制字。2.初始计数必须遵循控制字中指定的格式(仅限低有效字节,仅限高有效字节,或低有效字节然后是高有效字节)。只要遵守这些规则,任何编程顺序都是可以接受的。读取计时器有两种方法:计时器锁存命令和读回命令。计时器锁存命令计时器锁存指令允许在不影响过程中定时的情况下“动态”读取计时器。二进制计时器16位1二进制编码十进制(BCD)计时器(4个十进制)*BCD位指定计时器计数值是二进制还是BCD。与控制字一样,计时器锁存器命令被写入控制字寄存器(I/O地址$503,见表4-1)。选择定时器位(ST1,ST0,见表4-3)选择三个定时器中的一个,而读/写位(RW1,RW0,见图4-4)选择定时器锁存命令,RW1=0和RW0=0。在发出定时器锁存命令时,所选定时器的计数被锁存到0L寄存器中。计数保存在0L锁存器中,直到读取。多个定时器锁存命令可用于锁存多个定时器。同样,每个计时器的计数被锁存,直到被读取。
When programming the 82C54, only two rules need to be followed. 1. For each Timer, the Control Word must be written first. 2. The initial count must follow the format specified in the Control Word (least significant byte only, most significant byte only, or least significant byte then most significant byte). As long as these rules are adhered to, any programming sequence is acceptable. Reading There are two methods for reading the timers: the Timer Latch Command and the Read-Back Command. Timer Latch Command The Timer Latch Command allows the reading of a Timer ‘on the fly’ without affecting the timing in process.Binary Timer 16-bits 1 Binary Coded Decimal (BCD) Timer (4 Decades) * The BCD bit specifies whether the Timer count value is in Binary or BCD.Like a Control Word, the Timer Latch Command is written to the Control Word Register (I/O Address $503, see Table 4-1). The Select Timer bits (ST1, ST0, see Table 4-3) select one of the three timers while the Read/Write bits (RW1,RW0, see Table 4-4) select the Timer Latch Command, RW1 = 0 and RW0 = 0. The selected Timer’s count is latched into the 0L registers at the time of the Timer Latch Command. The count is held in the 0L latches until it is read. Multiple Timer Latch Commands can be used to latch more than one Timer. Again, each Timer’s count is held latched until it is read.
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●使用前:
在操作和维护,安装设备之前,请阅读并严格遵守安全相关的信息。
Read and strictly follow safety-related information before operatingmaintainingand installing equipment.
●使用者要求:
必须从事安装,组装或维护设备等相关工控电气机械以及其他相关技术的人员。
Must be engaged in the installation,assembly or maintenance of equipment and other related industriacontroeectrica machinery and other related technica personne.应用范围:
应用于品牌本系列工业以及生产生活自动化设备产品。
Used in the brand of this series of industriaand production automation eauipment products
适用于场景:系统集成,非标定制,产线升级改造,原设备电气替换等等。
Suitable for scenarios:system integration,non-standard customizationproduction line upgrading and transformation,electrical replacement of original equipment,etc.
●操作人员:
应该由本品牌专业培训操作员来安装、操作和维修设备。专业人员具有技术能力强,熟悉安全信息和安全实施:
熟悉设备的安装加工、操作和维护:熟悉处理所有的潜在危险情况。
Equipment should be installed,operated and maintained by trained operators from the brand
●危险情况
警告
.请注意使用人员的人身安全。
●除了产品特性以及功能,还需了解产品的使用寿命环境。
●充分学习产品使用手册,否则非专业人员可能会造成人身危险。
Study the product instruction manual thoroughlyotherwise it may cause personal danger to non-professionals.
●服务行业
适用水泥,木业,石业,橡胶,石油,化工,发电,环保,水处理,制冷,交通,钢铁,食品,饮料,船舶,制冷等行业
Applicable to cementwood,stone,rubber,petroleumchemical, power generation