P0917GZ冗余8通道卡件
记录到ESL功能块的事件可在以下位置查看：通过按下确认按钮，操作员面板
显示包含ESL函数的循环时已记录事件的块。字母数字显示器
这将是通过任何活动报警、状态和条件的第一步或错误，然后是此后发生的所有记录事件上次复位。配置的8字符名称将为：显示在字母数字显示中，顺序为：出现（ESL-1、ESL-2…）将出现在数字
单步执行事件日志时显示。其他活动例如警报、状态条件或错误可以类似如果记录到ESL功能块，则查看。EXP_功能块在固件1.30及更高版本中执行自然指数函数，以“e”为基数。输出将是值“e”提高到输入X的幂。固件1.30及更高版本中的EXT_功能块将提供一个等于Y输入的输出，被提升到X输入的幂。输入Y的所有负值将被视为0.0Y为0.0，X为负，输出将设置为最大值编号（即1.17…e38）。
FTG_功能块为一个每次输入P从高电平
（1）转换时的扫描周期输入到低（0）输入。GB_功能块提供动作、增益和偏置
对输入信号A的调整。尽管该块可以提供信号缩放，如果需要，不应将其用作范围指针的引用。SCL功能块当为此目的需要缩放时，应使用。HLD_功能块提供的输出等于在配置中保持VAL设置，以便与其他功能块。ID是一个纯积分控制器和五个控制器之一可以在每个循环一个的基础上使用的类型。它使用以提供积分动作，
允许与其他功能块或外部进行交互装置，如气动控制器和切断装置切换，同时消除可能发生的故障其他控制器类型。在下列情况下提供衍生诉讼：参数TD为非零。
当输入A为高（1）时，控制器将在正常自动模式，当低（0）时，将导致输出以跟踪反馈信号。这将使控制器输出跟踪限制。当控制器切换回自动时如果GE为非零，则滞后（GE+FB）输入处的值将导致输出积分到TI时间常数。进程范围指针参数指向函数具有范围缩放的块，如模拟输入提供过程变量信号。这使控制器，用于归一化范围的调谐参数过程输入。如果未配置此参数，控制器将使用0.00-100.00的范围缩放。通电-在热启动或冷启动期间，输出将初始化为MINSCALE参数的值并且所有动态状态将在第一扫描周期被初始化为它们的当前输入值。
Events logged to the ESL function block can be viewed at
the operator faceplate by pressing the ACK pushbutton
when displaying the loop containing an ESL function
block having logged events. The alphanumeric display
will first step through any active alarms, status conditions
or errors and then all the logged events that occurred since
the last reset. The configured 8-character name will be
shown in the alphanumeric display and the order of
occurrence (ESL-1, ESL-2...) will appear in the numeric
display when stepping through the event log. Other events
such as alarms, status conditions, or errors can be similarly
viewed if logged to the ESL function block. EXP_ function blocks, in firmware 1.30 and higher, perform the
natural exponentiation function, base “e”. The output will be the
value “e” raised to the power of input X. EXT_ function blocks, in firmware 1.30 and higher, will provide
an output that equals the Y input raised to the power of X input.
All negative values of input Y will be treated as 0.0. When input
Y is 0.0 and X is negative, the output will be set to the maximum
number (i.e. 1.17...e38). FTG_ function blocks provide a high (1) output for one
scan cycle each time input P transitions from a high (1)
input to a low (0) input. GB_ function blocks provide action, gain, and bias
adjustments to input signal A. Although this block can
provide signal scaling, it should not be used if needed as a
reference for a range pointer. The SCL function block
should be used when scaling is required for this purpose.
HLD_ function blocks provide an output equal to the
HOLD VAL set in configuration for interconnection to
other function blocks. ID is an integral only controller and one of five controller
types that can be used on a one per loop basis. It uses
external feedback to provide integral action and, therefore,
allows interaction with other function blocks or external
devices, such as pneumatic controllers and shutoff
switches while eliminating windup that can occur with
other controller types. Derivative action is provided when
the parameter TD is non-zero.
When input A is high (1) the controller will operate in the
normal auto mode and when low (0) will cause the output
of the lag function to track the feedback signal. This will
cause the controller output to track the feedback within the
limits. When the controller is switched back to auto, the
value at the input of the lag (GE+FB), if the GE is nonzero, will cause the output to integrate to a new output at
the TI time constant.
The process range pointer parameter points to a function
block that has range scaling, such as the analog input that
is providing the process variable signal. This enables the
controller to normalize the tuning parameters for the range
of the process input. If this parameter is not configured, the controller will use a range scaling of 0.00 - 100.00.
POWER UP - During a warm or cold start, the output will be initialized to the value of the MINSCALE parameter
and all dynamic states will be initialized to their current input value on the first scan cycle.
