PLC程序计算子盘头当前的米数和记录的母盘头米数的偏差，如果子盘头略少则增加伺服的供丝速度，反之则减少。这种做法的好处是测速罗拉的线速度基本上保持不变，从而角速度的变化也很小，通过微量调整伺服的齿轮比来改变伺服的速度既可以增加供丝量也可以减少张力的波动。 MICRO PLC与TLC53的连接通过CPP110通讯卡来实现，在SYCON软件中，我们可以把伺服的使能控制，电子齿轮的开关控制以及伺服的状态配置为PDO的方式，这样的配置保证了控制逻辑上高的通讯优先级。此外在程序中利用SDO方式发送电子齿轮比。 我们将通讯的建立模式改为程序延时建立，这样做法保证了CANOPEN通讯在频繁的断电中仍然可靠地工作。 从用户的初步试车结果来看，本系统的效果比起双变频的系统来讲有了很大的提高，2万米的拷贝结果，误差在3米以内，只有以前双变频方案结果的十分之一左右，用户对此结果是比较满意的。
JANCD-FC242-485394
The PLC program calculates the deviation between the current meter number of the sub pan head and the recorded meter number of the master pan head. If the sub pan head is slightly less, the servo wire feeding speed will be increased; otherwise, it will be reduced. The advantage of this method is that the linear speed of the speed measuring roller is basically unchanged, so the change of angular speed is also small. Changing the servo speed by slightly adjusting the servo gear ratio can not only increase the wire supply, but also reduce the tension fluctuation. The connection between micro PLC and tlc53 is realized through cpp110 communication card. In Sycon software, we can configure the enable control of servo, the switch control of electronic gear and the status of servo as PDO, which ensures the highest communication priority in control logic. In addition, the electronic gear ratio is sent by SDO in the program. We change the communication establishment mode to program delay establishment, which ensures that CANopen communication can still work reliably in frequent power outages. From the user's preliminary test results, the effect of this system has been greatly improved compared with the dual frequency conversion system. The error of the 20000 meter copy result is less than 3 meters, which is only about one tenth of the result of the previous dual frequency conversion scheme. The user is quite satisfied with this result.
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