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40PB3201A可編程控制卡
線性速度減速（a）將電機(jī)停止模式配置為線性速度減速模式
命令電機(jī)沿直線從全速停止到零速
基于用戶配置的停止時(shí)間的斜坡。此停止模式需要轉(zhuǎn)速表輸入（0…5V DC）。即使您已編程線性停止，也無需設(shè)置線性停止開始線性停止不能制動(dòng)電機(jī)/負(fù)載并減少停止時(shí)間正如在全電壓下啟動(dòng)離心泵會(huì)導(dǎo)致液錘和止回閥砰的一聲，關(guān)閉全速運(yùn)轉(zhuǎn)的離心泵也會(huì)產(chǎn)生相同的結(jié)果。SMC Flex的泵停止模式產(chǎn)生電機(jī)停止曲線，遵循離心泵的停止特性抽水機(jī)電機(jī)停止曲線導(dǎo)致電機(jī)速度逐漸降低。SMB為需要電機(jī)停止的應(yīng)用提供電機(jī)制動(dòng)比海岸休息快。帶自動(dòng)零速關(guān)閉的制動(dòng)控制完全集成到SMC Flex控制器的設(shè)計(jì)中。本次設(shè)計(jì)便于清潔、直接安裝，并消除了附加硬件的要求（例如，制動(dòng)接觸器、電阻器、定時(shí)器和速度傳感器）?；谖⑻幚砥鞯闹苿?dòng)
該系統(tǒng)向標(biāo)準(zhǔn)鼠籠式感應(yīng)電動(dòng)機(jī)施加制動(dòng)電流。制動(dòng)電流強(qiáng)度可在滿載的0…400%范圍內(nèi)編程現(xiàn)在的制動(dòng)時(shí)低速（a）
低速制動(dòng)用于需要低速（英寸）的應(yīng)用向前或向后），以便定位或?qū)R，還需要制動(dòng)控制停止。預(yù)設(shè)慢速提供7%的基本速度前進(jìn)方向基本速度設(shè)置的（低）或15%（高）。制動(dòng)電流可在0…400%范圍內(nèi)調(diào)節(jié)。
在需要控制位置停止的應(yīng)用中使用Accu-Stop。
在停止過程中，向電機(jī)施加制動(dòng)扭矩，直到達(dá)到配置預(yù)設(shè)低速值（7%或15%），并將電機(jī)保持在此速度，直到發(fā)出停止命令。然后施加制動(dòng)扭矩，直到電機(jī)達(dá)到零速。制動(dòng)電流可編程范圍為0…400%滿載電流。本節(jié)介紹SMC的保護(hù)和診斷功能Flex控制器提供。
超載SMC Flex控制器滿足電機(jī)過載的適用要求保護(hù)裝置。熱記憶提供了額外的保護(hù)即使控制電源斷開也能保持。內(nèi)置過載控制存儲(chǔ)在參數(shù)12“電機(jī)熱使用”中的值；一當(dāng)該值達(dá)到100%時(shí)，發(fā)生過載故障。編程
本節(jié)中的參數(shù)提供了應(yīng)用程序靈活性和輕松設(shè)置。利用SMC Flex控制器的欠載保護(hù)，電機(jī)運(yùn)行如果檢測到電流突然下降，則可以停止。
SMC Flex控制器提供可調(diào)節(jié)的欠載跳閘設(shè)置編程電機(jī)滿載額定電流的0…99%。您可以調(diào)整跳閘延遲時(shí)間為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.
