C#上位机序列6: modbus通信（NModbus4 modbus tcp）
C#上位机序列1: 多线程（线程同步，事件触发，信号量，互斥锁，共享内存，消息队列）
modbus点位多，轮询慢问题，造成数据延时问题
1. 采用并行的方式采集从站设备，采用串行的方式获取从站点位数据；
2. 制定轮询策略，实时性要求高的点位，轮询周期短；实时性要求低的点位，轮询周期长；非必要不轮询，数据有变化才写入；
3. 一次读取从站的所有数据，不要按点位多次读取；
4. 提高串口的波特率；
5. 采用can通信方式
读取
bool
[调试] 2021-04-27 09:34:57.940 Thread [009] ModbusTcpServer[502] : Tcp 接收：00 00 00 00 00 06 01 01 00 63 00 01
[调试] 2021-04-27 09:34:57.940 Thread [009] ModbusTcpServer[502] : Tcp 发送：00 00 00 00 00 04 01 01 01 00
short
[调试] 2021-04-27 09:33:23.307 Thread [013] ModbusTcpServer[502] : Tcp 接收：00 00 00 00 00 06 01 03 00 63 00 01
[调试] 2021-04-27 09:33:23.307 Thread [013] ModbusTcpServer[502] : Tcp 发送：00 00 00 00 00 05 01 03 02 00 00
int
[调试] 2021-04-27 09:33:52.148 Thread [013] ModbusTcpServer[502] : Tcp 接收：00 00 00 00 00 06 01 03 00 63 00 02
[调试] 2021-04-27 09:33:52.148 Thread [013] ModbusTcpServer[502] : Tcp 发送：00 00 00 00 00 07 01 03 04 00 00 00 01
float
[调试] 2021-04-27 09:34:29.733 Thread [013] ModbusTcpServer[502] : Tcp 接收：00 00 00 00 00 06 01 03 00 63 00 02
[调试] 2021-04-27 09:34:29.733 Thread [013] ModbusTcpServer[502] : Tcp 发送：00 00 00 00 00 07 01 03 04 00 00 00 01
long
[调试] 2021-04-28 15:41:46.049 Thread [008] ModbusTcpServer[502] : Tcp 接收：00 09 00 00 00 06 01 03 00 64 00 04
[调试] 2021-04-28 15:41:46.049 Thread [008] ModbusTcpServer[502] : Tcp 发送：00 09 00 00 00 0B 01 03 08 3F 80 00 00 00 00 00 00
double
[调试] 2021-04-28 15:42:12.893 Thread [009] ModbusTcpServer[502] : Tcp 接收：00 0B 00 00 00 06 01 03 00 64 00 04
[调试] 2021-04-28 15:42:12.893 Thread [009] ModbusTcpServer[502] : Tcp 发送：00 0B 00 00 00 0B 01 03 08 3F 80 00 00 00 00 00 00
写入
bool
[调试] 2021-04-28 15:43:27.742 Thread [008] ModbusTcpServer[502] : Tcp 接收：00 00 00 00 00 06 01 05 00 64 FF 00
[调试] 2021-04-28 15:43:27.742 Thread [008] ModbusTcpServer[502] : Tcp 发送：00 00 00 00 00 06 01 05 00 64 FF 00
short
[调试] 2021-04-28 15:44:05.406 Thread [003] ModbusTcpServer[502] : Tcp 接收：00 02 00 00 00 06 01 06 00 64 00 01
[调试] 2021-04-28 15:44:05.406 Thread [003] ModbusTcpServer[502] : Tcp 发送：00 02 00 00 00 06 01 06 00 64 00 01
int
[调试] 2021-04-28 15:44:24.557 Thread [003] ModbusTcpServer[502] : Tcp 接收：00 03 00 00 00 0B 01 10 00 64 00 02 04 00 00 00 01
[调试] 2021-04-28 15:44:24.558 Thread [003] ModbusTcpServer[502] : Tcp 发送：00 03 00 00 00 06 01 10 00 64 00 02
float
[调试] 2021-04-28 15:44:45.854 Thread [003] ModbusTcpServer[502] : Tcp 接收：00 04 00 00 00 0B 01 10 00 64 00 02 04 3F 80 00 00
[调试] 2021-04-28 15:44:45.854 Thread [003] ModbusTcpServer[502] : Tcp 发送：00 04 00 00 00 06 01 10 00 64 00 02
long
[调试] 2021-04-28 15:45:37.896 Thread [006] ModbusTcpServer[502] : Tcp 接收：00 06 00 00 00 0F 01 10 00 64 00 04 08 00 00 00 00 00 00 00 01
[调试] 2021-04-28 15:45:37.896 Thread [006] ModbusTcpServer[502] : Tcp 发送：00 06 00 00 00 06 01 10 00 64 00 04
double
[调试] 2021-04-28 15:45:07.224 Thread [003] ModbusTcpServer[502] : Tcp 接收：00 05 00 00 00 0F 01 10 00 64 00 04 08 3F F0 00 00 00 00 00 00
[调试] 2021-04-28 15:45:07.224 Thread [003] ModbusTcpServer[502] : Tcp 发送：00 05 00 00 00 06 01 10 00 64 00 04
bool 读写测试
short 读写测试
int 读写测试
float 读写测试
double 读写测试
long 读写测试
int, float 涉及传输顺序,必须按照相同的传输顺序进行传送和解析，否则会造成数据错误
ModBusTcpServer 与 ModBusTcpClient
更新日志
2023-10-25 新增批量读取及批量写入功能
2023-11-16 支持02指令
