推荐回答（5个）
单片机的门槛肯定比PLC高，会单片机的话PLC多少花点功夫也就差不多了，开发单片机你首先你要知道，单片机是硬软件结合的，有些人会硬件不会软件，有些人会软件不会硬件，有些人硬软件都会，当然都会就要求掌握非常多的知识了，软件靠花功夫去学，去研究，硬件靠长时间工作经验的积累，如果单片机硬软件你都有条件搞好，才建议你学单片机，其实新手从PLC入门会更合适。
你要是有天赋 想做研究 那就是单片机 软件 硬件 那是肯定的 就是底层研究开发
学单片机 搞手机啊 遥控器啊 批量的生产啦 之类
你要是干工程 做项目 进工厂 那就是PLC
需要说明的是 只学plc 远远不够的
电路设计 选型 布局 集成 编程 外围（伺服 变频器 pid 称重 步进 编码器）通讯 上位机 触摸屏 调试 工艺 流程 这些
学好任何一个 都很好 得学好
还有那些数制 编码 编址寻址 进制都是相通的
PLC学的快些 单片机感要很久 可能两年 还没入门
另外 也不要那么非东就是西 plc实际也是单片机系统
很多电子 计算机 软件等的概念 都是相通的 之四换下形式出现而已
本质上是：电脑 手机 plc 遥控机 都是一个东西
数字设备
单片机的那个中断 响应 子程序 中断程序 中断编号 主程序 cpu 寄存器 间接寻址 定时器 等概念在plc里也一样的
一个经验：最好不要瞎摸索，瞎摸索没几个人能出来。或者要好久好久，赚钱不等人哪。
找人带是最好 最快最经济 最明智的选择
看你喜欢往哪个方面发展啦。这是两个方面的，PLC是电气化控制的，单片机属于电子电路类的，PLC属于一个大的系统，单片机属于电子电路控制类的，用单片机加外围就是PLC了，
你想去工厂做实际工作的话建议你学PLC，你要是想做研究开发什么的建议你去学单片机。
PLC是强化的单片机，二次开发的产物
凡是如此，做二次开发的肯定没有底层开发的值钱，懂吧？
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