The algorithms which transfer data from the LC module (that is, SLCAIN and
SLCDIN) must have both cards’ hardware addresses entered and must use the
inputs PSTA and SSTA to select which of the card’s data to transfer.
5-5. LC/Modbus Interface Redundancy Operation
11/98 5-3 U3-1050
Westinghouse Proprietary Class 2C
• An SLCDOUT algorithm is used to send a digital state to the LC register
specified with the controlreg /FILE attribute in the interface configuration file.
This digital is used to tell the LC module to communicate or not to
communicate. One algorithm is entered for each of the modules so that each can
be enabled independently.
• Another SLCDIN algorithm is added to read the LC register specified as
ExecutedOnceReg. This register goes true when the LC module has
successfully completed all the configured transactions once.
• The SLCSTAT algorithm must be included in the Controller’s configuration
with both LC cards’ hardware addresses entered. The watchdog timer bit (bit 0)
of variables PSTA and SSTA is monitored to ascertain the success of the
communication.

从LC模块传输数据的算法（即SLCAIN和
SLCDIN）必须输入两个卡的硬件地址，并且必须使用
输入PSTA和SSTA以选择要传输的卡数据。
5-5. LC/Modbus接口冗余操作
1998年11月5-3 U3-1050
西屋专有2C级
•SLCDOUT算法用于向LC寄存器发送数字状态
使用接口配置文件中的controlreg/FILE属性指定。
该数字信号用于通知LC模块通信或不通信
交流为每个模块输入一个算法，以便每个模块
可以独立启用。
•添加另一个SLCDIN算法，以读取指定为
执行完毕。当LC模块发生故障时，该寄存器变为真
一次成功完成所有配置的事务。
•控制器配置中必须包含SLCSTAT算法
输入两个LC卡的硬件地址。看门狗定时器位（位0）
监测PSTA和SSTA变量的变化，以确定试验是否成功
表达