PC-E984-685继电器模块
SUB_功能块对这两个输入信号。任何未使用的输入都将设置为0.0。
所有输入应具有相同的工程单位。If单位不一致，可以使用SCL功能块或另一种方法是使用内置的第m个功能块缩放函数。在固件1.30及更高版本中，TAN_功能块接受弧度输入和输出该角度的切线。TH_功能块可以保存一个初始值，该值将：上电时传输至块输出O1，可以：用于在输入TC为高（1）时跟踪电视输入。
在1.30固件或更高版本中，保持值可以是当TH_时，使用脉冲发生器在线改变。O1区块输出直接连接到ODC中的X或Y输入块脉冲发生器制造所使用的范围和分辨率在线变化将由X范围或Y确定
Range inputsTOT_功能块接受布尔输入，并且将保留输入转换的运行总数，作为块输出作为与其他块互连的实际值控制器中的块。可以重置运行总数
当输入R变高时（1）。输入R在在每个扫描周期读取输入S。
未配置的输入将设置为0。当EDGETRIG参数设置为1，则总数将输入S上的每个0到1转换的增量。当如果EDGETRIG参数设置为0，则总数将每次1到0转换时递增。
在热启动和热启动期间，总数将保留并且在冷启动时将被初始化为0.0。TSW_功能块选择两个模拟输入中的一个信号作为输出信号。输入A变成输出当输入SC为低（0）时，输入B将为输出当输入SC变高时（1）。
未配置的输入将默认为SC=low（0）、A=0.0，B=100.0。XOR_功能块执行逻辑异或
在所有三个输入上运行。未使用的输入将导致块用作双输入XOR。异或输出
当所有配置输入均为低（0）时，将为低电平（0），或当所有配置的输入为高（1）时。4.0工厂配置选项
工厂配置的选项提供了一种简单的方式来配置352Plus、353或354型如果工厂配置选项（FCO）将提供一个完整的、功能齐全的回路控制器，只要输入/输出正确进行连接。可以对FCO进行更改，以满足个别要求。上的FCO列表以下页面记录了与第3节中列出的默认值不同的参数。
SUB_ function blocks perform arithmetic subtraction on
the two input signals. Any unused input will be set to 0.0.
All inputs should have the same engineering units. If units
are not consistent, a SCL function block can be used or an
alternative is to use a MTH function block that has built-in
scaling functions. TAN__ function blocks, in firmware 1.30 and higher, accept a
radian input and output the tangent of that angle. TH_ function blocks can hold an initial value that will
transfer to the block output O1 on power up and it can be
used to track the TV input when input TC is high (1).
In 1.30 firmware or greater, the HOLD value can be
changed on line, using the pulser, when the TH_.O1 block
output is directly connected to X or Y inputs in an ODC
block. The range and resolution used by the pulser making
on line changes will be determined by the X Range or Y
Range inputsTOT_ function blocks accept a Boolean input and they
will retain a running total of the input transitions as the
block output as a real value for interconnection to other
blocks in the controller. The running total can be reset
when input R goes high (1). Input R is executed prior to
reading input S on each scan cycle.
Unconfigured inputs will be set to 0. When the
EDGETRIG parameter is set to 1, the total will
increment on each 0 to 1 transition on input S. When
the EDGETRIG parameter is set to 0, the total will
increment on each 1 to 0 transition.
The total will be retained during a WARM & HOT start
and will be initialized to 0.0 on a COLD start. TSW_ function blocks select one of two analog input
signals as the output signal. Input A becomes the output
when input SC is low (0) and input B will be the output
when input SC goes high (1).
Unconfigured inputs will default to SC=low(0), A=0.0,
B=100.0. XOR_ function blocks perform a logical exclusive OR
function on all three inputs. An unused input will cause the
block to function as a two input XOR. The XOR output
will be low (0) when all configured inputs are low (0) or
when all configured inputs are high (1). 4.0 FACTORY CONFIGURED OPTIONS
Factory Configured Options provide an easy way to configure a Model 352Plus, Model 353, or Model 354. In most
cases a Factory Configured Option (FCO) will provide a complete, functional loop controller, once the proper I/O
connections are made. Changes can be made to an FCO to meet individual requirements. The FCO listings on the
following pages document the parameters that are different than the default values listed in section 3.
