FBM219
FBM219
FBM219
3)设备组合方式。通常一条完整的生产线用户会采购生产设备厂家性能或价格有优势的产品,或根据自身生产的产品采用不同的设备组合,故每条生产线组合可能完全不同。
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,为满足方便安装,方便整线整合,提高系统性能,本系统按照单机设计、自由组合方式设计(见图2、图3),即是每台针刺机使用一台PLC、一台人机、每台针刺机提供联机接口,不同需求用户组成生产线时控制上只要将各机台连上控制总线即可,单机程式不须做修改,改动内容仅在总控制器部分。台达的驱动器、控制器及人机界面等产品均带有RS485接口,采用通讯方式安装方便、价格低廉,故在规划整条生产线的控制方式时可以充分利用通讯的方便性。故可以拟出以下两种方式:图2方式,PLC与人机联线使用RS232,模拟量传递速度信号(考虑到通讯有实时性问题),变频器频率由PLC通讯给定,功能端子给定命令。图3方式,PLC与人机联线使用RS485, 模拟量传递速度信号,变频器频率由人机COM3通讯给定,功能端子给定命令。两者相比差异在于变频器控制源上。虽然效果一样,但图3方式远远增强了人机与PLC的通讯距离,亦即对本系统来说人机安放的范围将很宽,更适合生产线上分布安装,故将本系统按照图3设计。如图3所示,本系统将使用到变频器,PLC和人机界面。按照机型体积和驱动能力,台达变频器分出多个系列产品,因VFD-B系列变频器支持矢量闭环控制,低频驱动能力强,而针刺机系统对速度稳定性要求较高,并且定位模式运行时要求低速大力矩,故本系统采用性价比较高的VFD-B。人机采用具有两个RS485的DOP-AE系列和PLC采用具有良好性价比的DVP-SA。
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