nestjs node-snap7 读写S7 bool数组
时间: 2023-08-05 17:04:12 浏览: 52
要读写S7 bool数组,可以使用node-snap7这个库,结合NestJS框架进行开发。以下是一个简单的示例代码:
```typescript
import { Injectable } from '@nestjs/common';
import snap7 from 'node-snap7';
@Injectable()
export class PlcService {
private readonly plc = new snap7.S7Client();
async connect(): Promise<void> {
await this.plc.ConnectTo('192.168.1.100', 0, 1);
}
async readBoolArray(db: number, start: number, size: number): Promise<boolean[]> {
const buffer = Buffer.alloc(size);
await this.plc.DBRead(db, start, size, buffer);
const boolArray = [];
for (let i = 0; i < size; i++) {
boolArray.push(buffer.readUInt8(i) !== 0);
}
return boolArray;
}
async writeBoolArray(db: number, start: number, boolArray: boolean[]): Promise<void> {
const buffer = Buffer.alloc(boolArray.length);
for (let i = 0; i < boolArray.length; i++) {
buffer.writeUInt8(boolArray[i] ? 1 : 0, i);
}
await this.plc.DBWrite(db, start, buffer.length, buffer);
}
}
```
在上面的代码中,connect()方法用于连接到PLC设备,readBoolArray()方法用于读取bool数组,writeBoolArray()方法用于写入bool数组。这些方法可以在NestJS的控制器中被调用,以实现与PLC设备的交互。
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