用PLC对自动售货机进行控制，根据工作要求，写出梯形图并给出解释。

输入地址：X0:一元币识别口；X1:五元币识别口；X2:十元币识别口；X3:咖啡按钮；X4:汽水按钮；

输出地址：Y10:咖啡出口，Y11:汽水出口,Y12：咖啡按钮指示灯,Y13：汽水按钮指示灯，

Y14：找钱指示灯。

工作要求：（售货机可投入1元，5元或10元硬币。）

（1）当投入硬币总值超过12元时，汽水按钮知识灯亮；又当投入的硬币总值超过15元时，汽水及咖啡按钮灯都亮。

（2）当汽水按钮指示灯亮时，按汽水按钮，则汽水排出10秒后自动停止。该段时间内，汽水按钮指示灯闪动。

（3）当咖啡按钮指示灯亮时，按咖啡按钮，则咖啡排出10秒后自动停止。该段时间内，咖啡按钮指示灯闪动。

（4）若投入硬币值超过按钮的钱数（汽水12元，咖啡15元）时，找钱指示灯亮。

-With PLC control of the vending machine, according to job requirements and gives explanation to write ladder.

Enter an address: X0: I identify a dollar coin　X1: 5 yuan currency to identify the mouth　X2: I identify the ten-dollar coins　X3: coffee button　X4: soft button

Output Address: Y10: Coffee Exports, Y11: soft exports, Y12: coffee button lights, Y13: soft button indicator light,

Y14: money indicator.

Requirements: (vending machines available for 1 yuan, 5 yuan, or 10-dollar coins.)

(1) When the total value of coins in more than 12 yuan, the soft button lights knowledge　and when the investment value of more than 15 yuan coin, the soft drinks and coffee button lights are bright.

(2) When the soft button indicator light, press the soft button, from soft drinks to stop automatically after 10 seconds. That period, the soft lights flashing button.

(3) When the coffee button indicator light, press the coffee button, the coffee from 10 seconds after the automatic cut-off. That