必须实施呼叫数字IO with Modbus协议 on 春季启动项目构建者Maven.
它应该是在身体上有一定持续时间的脉冲呼叫(例如 5 秒等)
以下是规范中的一个片段:
关于响应和错误的更多信息:
看来这个呼叫应用程序应该表现得像一个大师。在这种情况下,Web Relay 应该像一个奴隶。
我认为采用一些库来与 Modbus 集成比从零开始编写要好得多。
哪种方法更适合在 Spring Boot 中采用此功能?
这里有网络中继手册 https://www.controlbyweb.com/webrelay-10/manuals.html.
UPDATE:
Tried 凯文赫伦的回答 https://stackoverflow.com/a/66266404/1498427
这是代码部分:
@Override
public void callDigitalIO(String ipAddress, String relay) {
log.debug("call Digital IO by MODBUS");
checkNotEmpty(ipAddress, relay);
ModbusTcpMasterConfig config = new ModbusTcpMasterConfig.Builder(ipAddress).build();
ModbusTcpMaster master = new ModbusTcpMaster(config);
master.connect();
ByteBuf buffer = Unpooled.buffer();
buffer.writeInt(0x00003F00);
buffer.writeInt(0x000040A0);
int relayNum = Integer.parseInt(relay);
WriteMultipleRegistersRequest request = new WriteMultipleRegistersRequest(
relayNum,
0x02 * relayNum,
buffer
);
log.debug("MODBUS_REQUEST: {}", request);
master.sendRequest(request, 0xFF)
.whenCompleteAsync((response, ex) -> {
if (response != null) {
log.info("MODBUS_RESPONSE: {}", response);
} else {
log.error("EXECUTION_FAILED: {}", ex.getMessage(), ex);
}
});
master.disconnect();
}
使用真实设备尝试了以下代码片段,输出如下:
2021-02-25 22-07-03.955 [carpark-ex-4] DEBUG c.s.s.dio.ModbusDigitalIoServiceImpl - MODBUS_REQUEST: WriteMultipleRegistersRequest(UnpooledByteBufAllocator$InstrumentedUnpooledUnsafeHeapByteBuf(ridx: 0, widx: 8, cap: 256))
2021-02-25 22-07-03.970 [ForkJoinPool.commonPool-worker-5] ERROR c.s.s.dio.ModbusDigitalIoServiceImpl - EXECUTION_FAILED: not connected
java.lang.Exception: not connected
at com.digitalpetri.netty.fsm.ChannelFsmFactory.lambda$null$2(ChannelFsmFactory.java:115)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
at java.base/java.lang.Thread.run(Thread.java:832)
仅当我这样做时:
master.sendRequest(请求, 0xFF).get()
它开始起作用了。