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40PB3201A可编程控制卡
线性速度减速（a）将电机停止模式配置为线性速度减速模式
命令电机沿直线从全速停止到零速
基于用户配置的停止时间的斜坡。此停止模式需要转速表输入（0…5V DC）。即使您已编程线性停止，也无需设置线性停止开始线性停止不能制动电机/负载并减少停止时间正如在全电压下启动离心泵会导致液锤和止回阀砰的一声，关闭全速运转的离心泵也会产生相同的结果。SMC Flex的泵停止模式产生电机停止曲线，遵循离心泵的停止特性抽水机电机停止曲线导致电机速度逐渐降低。SMB为需要电机停止的应用提供电机制动比海岸休息快。带自动零速关闭的制动控制完全集成到SMC Flex控制器的设计中。本次设计便于清洁、直接安装，并消除了附加硬件的要求（例如，制动接触器、电阻器、定时器和速度传感器）。基于微处理器的制动
该系统向标准鼠笼式感应电动机施加制动电流。制动电流强度可在满载的0…400%范围内编程现在的制动时低速（a）
低速制动用于需要低速（英寸）的应用向前或向后），以便定位或对齐，还需要制动控制停止。预设慢速提供7%的基本速度前进方向基本速度设置的（低）或15%（高）。制动电流可在0…400%范围内调节。
在需要控制位置停止的应用中使用Accu-Stop。
在停止过程中，向电机施加制动扭矩，直到达到配置预设低速值（7%或15%），并将电机保持在此速度，直到发出停止命令。然后施加制动扭矩，直到电机达到零速。制动电流可编程范围为0…400%满载电流。本节介绍SMC的保护和诊断功能Flex控制器提供。
超载SMC Flex控制器满足电机过载的适用要求保护装置。热记忆提供了额外的保护即使控制电源断开也能保持。内置过载控制存储在参数12“电机热使用”中的值；一当该值达到100%时，发生过载故障。编程
本节中的参数提供了应用程序灵活性和轻松设置。利用SMC Flex控制器的欠载保护，电机运行如果检测到电流突然下降，则可以停止。
SMC Flex控制器提供可调节的欠载跳闸设置编程电机满载额定电流的0…99%。您可以调整跳闸延迟时间为0…99秒。
Linear Speed Deceleration(a)
Configuring the motor stop mode to Linear Speed Deceleration mode commands the motor to stop from full speed to zero speed following a linear ramp based on the user-configured stop time. This stopping mode requires a tachometer input (0…5V DC). You do not need to set up Linear Stop even if you have programmed a linear start. The Linear Stop cannot brake the motor/load and reduce the stopping time.Just as starting a centrifugal pump at full voltage causes fluid hammer and check valve slam, stopping a centrifugal pump that is running at full speed can also produce the same results. The Pump Stop mode of the SMC Flex generates a motor stop curve, which follows the stop characteristics of a centrifugal pump. The motor stop curve results in the gradual decrease in motor speed.SMB provides motor braking for applications that require the motor to stop faster than a coast-to-rest. Braking control with automatic zero speed shutoff is fully integrated into the design of the SMC Flex controller. This design facilitates a clean, straight-forward installation and eliminates the requirement for additional hardware (for example, braking contactors, resistors, timers, and speed sensors). The micro-processor based braking system applies braking current to a standard squirrel-cage induction motor. The strength of the braking current is programmable from 0…400% of full-load current.
Slow Speed with Braking(a)
Slow Speed with Braking is used on applications that require slow speed (in the forward or reverse direction) for positioning or alignment and also require braking control to stop. Preset Slow Speed provides either 7% of base speed (low) or 15% of base speed (high) settings in the forward direction. Braking current is adjustable from 0…400%
Use Accu-Stop in applications that require controlled position stopping. During stopping, braking torque is applied to the motor until it reaches the configured preset slow speed value (7% or 15%) and holds the motor at this speed until a stop command is given. Braking torque is then applied until the motor reaches zero speed. Braking current is programmable from 0…400% of full-load current.
This section describes the protection and diagnostic features that the SMC Flex controller provides. Overload The SMC Flex controller meets applicable requirements as a motor overload protective device. Thermal memory provides added protection and is maintained even when control power is removed. The built-in overload controls the value that is stored in Parameter 12, Motor Thermal Usage; an Overload Fault occurs when this value reaches 100%. The programming parameters in this section provide application flexibility and easy setup.Utilizing the underload protection of the SMC Flex controller, motor operation can be halted if a sudden drop in current is sensed. The SMC Flex controller provides an adjustable underload trip setting from 0…99% of the programmed motor full-load current rating. You can adjust the Trip delay time from 0…99 seconds.
