6SL3352-1AG28-5AA1

6SL3352-1AG28-5AA1

6SL3352-1AG28-5AA1

1. 开发时间较长：系统的开发需要比较长的时间，因为需要对各种系统设备的控制进行详细研究和分析，才能设计出符合实际需求的程序。

2. 初始成本高：PLC控制系统的完整部分需要较高的成本，特别是对于一些大型企业或复杂的系统来说，成本更加高昂。

3. 编程难度大：PLC控制系统的编程掌握要求较高，需要对控制逻辑的实现较为了解和熟悉。对于有些用户来说学习、掌握控制逻辑要求费时费力。

4. 系统可扩展性低：由于PLC控制系统是按照用户的具体要求进行定制的，所以在程度上限制了系统的可扩展性。如果要扩展系统功能，可能需要重新设计和重新编写程序，增加时间和成本。

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