VC中ModbusRTU通信与寄存器读取实现方法

本文目录一览

• 如何读取modbus寄存器中的值
• 如何不断地读modbus中某个寄存器的值
• VB6.0 PC与智能仪表COM通讯modbus协议485
• Mach3的ModBus如何设置能读取读出器里的数据。
• modbus协议的4号指令是什么？

如何读取modbus寄存器中的值

要在VC中实施Modbusrtu通信，您必须设置通信运动。
这包括创建文件谈判和设置通信参数，例如波特率，数据位，停止位和检查位。
特定代码如下：DCBDCB； hcom = createFile（“ com1 ”，generic_read | generic_write，0，零，open_existing，0，零）;接下来，计算CRC验证代码。
CRC是记录数据传输错误的检查代码。
计算过程包括用于位的数据处理，并使用特定的算法检查。
voidcalccrc（bytecrcbuf）{bytei; crc = crc^crcbuf; for（i = 0; i <8 ; i ++）{bytet; tt = CRC＆1 ; CRC = CRC >> 1 ; CRC = CRC＆0x7 fff;如果（tt = crc = crc = crc = crc = crc = 0xa001 ;通过发送部分，确定了通道的读数和数量，则计算CRC并发送数据。
特定的实现如下：ZXADDR = 1 0; writeBuf2 [0] = ZXADDR; writeBuf2 ; writebuf2 [1 ] = 3 ; write bert a Data; write bew;某个通道的Modbus设备需要以下，以确保通信的可靠性和数据的准确性。

如何不断地读modbus中某个寄存器的值

这是VC（1 ）中ModBusrtu通信的一个示例。
通信端口设置DCBDCB; hom = createFile（“ com1 ”，generic_read | generic_write，0，null，open_existing，0，null）; if（“ createbox，error”）;} boolerror = setupComm（HOM，1 02 4 ,1 02 4 ）; If (! Error) Messagebox ("setupcommerror); error = GetCommState (Hom, & DCB); If (! Error) Messagebox ("Messagebox"); dcb.baudrate = 2 4 00; dcb.Bytes = 8 ; dcb.baudate; / dcb.Stopbits = Onestopbit; Error = SetCommState (Hom, & DCB); (2 ) CRC verification code calculation uintcrcloidcalccrc（bytecrcbuf）{bytei，crc＆crcbf，0xa001 ==，crc＆0xa001 ; [3 ] [5 ]）; cartcrc（writebuf2 [6 ] = CRC＆0xff; writeBufil [7 ] = CRC / 0x1 00; writeBufile（hom，writebuf2 ,8 和comnum，null）;（4 ）； follows: Unsignedhare * Puchmsg / * Message CRC / * * Puchs Verification * / UnsignedShortsDatalen / * Number of bytes in the message * / {unsignedcharuchcrchi = 0xff / * High CRC byte initialization * / * UNS ignedcharuchcrchi = 0xff / * low CRC byte initialization / unsigneduindex; / * CRC循环 / while（USDATALEN-） / *传输消息缓冲区 * / {uindex = uchcrchi ^ puchmsg ++; /计算crc * / uchcrchi = uchcrchi [urhmcrchi = uchcrchi [urhcrchi = uchcrchi = uchcrchi [urhcrclclon =（uchcrchi =（uchcrchi << 8 | uchcrclo） {0x00,0C1 ,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0，0,0,0,0,0,0,0,0，0,0,0,0,0,0,0,0,0,0,0,0.0 c00 c0; 0X8 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0; 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0x8 1 ,0x8 1 ,0x8 1 ,0x8 1 ,0,0x00,0x00,0,0,0c1 ,0x8 1 ,0x4 0：0x01 ,0,0,01 ,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0c1 ,0x8 04 0.0,0,0,0 1 ,0x8 1 ,0,01 ,0,0,0,0,0,0,0,0,0,0、0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0、0,0,0,0,0,0,0,0,0,0,0,0,0,0,0他们0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0，0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,01 0，0,0,0,0,0,0,0,0,0，0,0,0,0,0，0,0,0,0,0,0,0，0.0,0,0,0,0,0,0,0,0,0,0,0,01 0，0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0， C0,0X8 0,0,0,0,0,0,0,0,0,01 ,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0，0,0,0,0， 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0， 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0，0，00，00,0 ，0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0，0，00,0 ：0,0,0,0,0,0,0,0,0,0,0,0c1 ,0,0,0x00,0,0,0,0,0,0,0,0他们C1 ,0x8 1 ,0,01 ,01 ,0,0,0,0,0,0,0,0,0，0,0,0,0,0,0,0,0,0,0,0,0,0，0,0,0,0,0,0,0,0,0 ，0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 X4 1 ,0X，0C1 ,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0、0,0,0,0,0,0,0,0,0,0,0,0,0,0,0、0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,01 0,0,0,0,0,0,0,0,0,0,0,0,01 00，0 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,01 0，0,0,0,0,0,0,0,0,0,0,0,01 0，0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0.0,0,0.0,0,0.0，0,0. XC0,0x8 0,04 1 ,0,0,0c1 ,0x8 1 ,0,0,01 ,01 ,0,0,0,0,0,0,01 0,04 ,04 ,0,0,0,0,0,0,01 0,0,0,0,0,0,0,01 0，0,0,0,0,0,0,0,01 0,0,0,0，0,0,0,0,0x0,0,0,0x00 00; 0xC1 ,0x8 1 ,0,0,0,0,0,0、0,0,0,0,0,0,0,0,0,0,0,0、0,0,0,0,0,0,0,0,0,0,0,0,0,0,0、00、00、00、00、00ao0000aa000o0州0,0,0、0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0，0 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 0xC1 ,0x8 1 ,04 0.01 ,0,0,0,0,0,0,0,01 ,01 ,0,0,0,0,0,0,0,0,0,0、0,0,0,0,0,0,0,0,0、0,0,0,0,0,0,0,0,0,0,0,0,08 0 0X4 1 ,01 ,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,01 ,01 ,0,0,0,0,01 ,01 ,01 ,0,0,01 ,001 ,001 ,01 1 ,001 ; 0xC0,0,0,04 1 ,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0c1 ,0，0,0x00; 0xC1 ,0x8 1 ,0,0,0,0,0,0,0、0,0,0,0,0,0,0,0,0,0,0,0,01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,001 ; 0xc0,0,08 0.04 1 ,0x00,0c1 ,0,0,0,0,0,0,01 ,0,0,0,0,0,0,0,0,0,0,0,01 0,0,0,0,0x0.0x000000000000 0000 0,0xC1 ,08 1 ,0,0,0,0,0,0,0,0,0,01 ,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0x0,0,0,0,0x0,0x0,0x0 x0 x0 x0x0x0x0x0x0x0x0x0x0x0x0x0x0x0，0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 0,0xC1 ,0x01 ,0x4 0,0x01 ,0x0,0x8 00x4 1 ,0x00,0x01 ,0x8 1 ,0x4 0 x4 0,0x01 ,0x01 ,0x01 ,01 ,01 ,0 x01 ,0x01 ,0x01 ,0x01 ,0x01 ,0x0,0x8 0,0x01 ,0x0,0x8 0,0x8 0,0x8 1 ,0x4 0x4 0 x4 0,0x01 ,0x8 1 ,0x4 0} / * CRC低位字节值表 * / staticcharauchcrclo [] = {0x00， 0xc0,0,0c1 ,01 ,01 ,03 ,01 ,01 ,02 ,03 c3 ,03 ,02 ,03 c3 ,03 ,03 ,02 ,02 ,03 c3 ,03 ,02 ,02 ,03 c3 ,03 ,03 ,03 ,03 ,03 ,0 2 ,06 06 06 06 06 06 06 06 06 0CCCCCCCCC6 ,06 0C4 ,04 ,0C6 ,06 0C4 ,04 ,0CCC6 ,06 0C4 ,04 ,04 ,0C6 ,06 0C 4 ,04 ,0CCC6 ,06 0C4 ,04 ,0C6 ,06 0C4 ,04 ,0CCC6 ,06 0C4 ,04 ,04 ,0CCC6 ,06 0C4 ,04 ,04 ,0CCC6 ,06 0C 4 ,04 ,0CCC6 ,06 0C4 ,04 ,0CCC6 ,06 0C4 ,04 ,0CCC6 ,06 0C4 ,04 ,04 ,0CCC6 ,06 0C4 ,04 ,04 ,0CC-0X0C， 0x0d，0x0f，0xxf，0xce，0x0e，0x0a，0x0a，0xce，0xcb，0xcb，0xcb，0xcb，0xcb，0xcb，0xcb，0xc9 ,009 08 ,08 ,08 ,0xd8 ，0x1 9 ,0x1 9 ,0x1 9 ,0x1 9 ,0xd9 ,0x1 9 ,0x1 9 ,0x1 9 ,0x1 9 ,0x1 b，0x9 ,0x9 ,0x9 ,0x9 ,0x9 ,0x9 ,0x9 ,0x9 ,bb，0x9 ,0x9 ,0x9 ,0x9 ,9 ,bb， 0x1 ，0x1 e，0x1 ，0xdf，0x1 f，0xdd，0x1 d，0x1 c，0xdc，0xdc，0x1 c，0x1 4 ;0xd4 ,0xd5 ,0xd3 d3 d2 ,0xd3 d2 ,0xd3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 d3 3 d3 3 d3 .0x1 ,0x1 ,0x1 ,0x1 ,0x1 ,0x1 ,0x1 ,0x1 ,0x1 ,0x1 ,0x1 ,0x1 ,0x1 ,0x1 ,0x1 ,0x1 ,0xf0; 0x3 0,0x3 1 ,0x3 3 .0xf3 ,0x3 3 .0xf3 ,0x3 3 .0x3 3 ,0x3 3 ,0x3 3 7 ,0x3 3 6 ,0x3 3 6 ,0x3 3 7 ,0x3 3 6 ,0x3 5 ,0x3 3 3 6 ,0x3 3 ,0x3 3 3 5 ,0x3 3 5 ,0x3 3 3 5 ,0x3 3 5 ,0x3 3 5 ,0x3 3 4 ,04 ,04 ,04 ,04 ,0,03 3 1 00，0xfc，0xfd，0x3 d，0xff，0x3 f; 0x3 e，0xfe，0xfa，0x3 a，0x3 b，0xfb，0x3 a 0x3 b，0x3 b，0xfb，0x3 a，0x3 a，0x3 b，0xfb，0x3 a 0x3 b，0x3 b，0xfbb，0xfbb，0x3 ea，0x3 ea，0x3 B，0x3 b，0xfb，0xfb，0x3 a 0x3 a 0x3 a 0x3 a 0x3 b，0x3 b，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，0xfb，| 8 ,0xe8 ,0xe9 ,0x2 9 ,0xeb，0x2 b，0x2 a，0x2 a，0xea，0xee，0x2 e，0x2 e，0x2 f，0x2 f，0x2 d，0x2 d，0xEd，0xec，0xec，0x2 c，0x2 c，0x，0x e4 ,0x2 4 ,0x2 5 ,0xe6 02 6 02 7 ,0xe6 02 6 02 7 ,0xe2 ,0xe3 ,0x2 3 ,0xe1 ,0xe2 ,0x.0,0x.0x.0x.0x.0x.0x.0x.0x.0x，0x，0x，0x，0,0,0x，0,0,0x，0,0,0x，0,0,0x，0,0,0x，0,0,0x，0,0,0x.0x A0,0x6 0,06 1 ,0xa1 ,06 3 ,0xa3 ,0xa2 ,0x6 3 ,0xa6 0a6 0a7 ,0x6 7 ,0x6 6 0a6 5 ,0x6 4 ,0xa4 ,0x 6 c, 0xac, 0xad, 0x6 d, 0xaf, 0xaf, 0xaf, 0x6 f, 0x6 f, 0xa, 0xa，0x6 ，0x6 ，0x6 a，0x6 b，0x6 a，0x6 b，0x6 b，0x6 ，0x6 9 ,0xa9 ,0xa8 ,0x6 8 ,0x6 8 ,0x7 8 ,0xb8 ,0x8 ,0x8 ,0x7 9 9 ,0xbb，0x7 bb，0x7 b，0x7 a，0x7 a，0xba，0xba，0xba，0xbi，0xbi，0x7 Ef，0x7 Ef，0f，0f，0f，0f，0f，0f，0f，0f，0f，0f，0f。
0xbF, 0xbd, 0xbc, 0x7 c, 0xbc, 0xbc, 0x7 c, 0xbd, 0xbc, 0x7 c, 0xbd: 0xbc, 0x7 c, 0xbd, 0xbc, 0xbc, 0xbc, 0x7 c, 0xb x7 2 ,0xb2 ,0xb3 ,0x7 1 ,0x7 0,0xb0,0x7 0,0xb0,0x5 1 ,0x9 1 ,0x5 1 ,0x9 3 ,0x5 3 ， 0x9 5 2 ,0x9 2 ,0x9 6 ,0x9 5 6 ,0x9 6 ,0x9 5 6 ,0x5 7 ,0x9 7 ,0x5 5 ,0x9 5 ,0x9 4 ,0x9 4 ,0x5 4 ,0 x9 c; 0x5 c, 0x9 d, 0x9 d, 0x9 d, 0x9 f, 0x9 f, 0x9 f, 0x9 f, 0x9 , 0x9 e, 0x9 , 0x5 a, 0x9 a, 0x5 a, 0x9 a, 0x9 b, 0x9 a, 0x9 b, 0x9 , 0x9 b, 0x5 b, 0 x9 9 ,0x5 9 ,0x5 8 ,0x9 8 ,08 8 ,0x4 8 ,0x4 9 ,0x8 9 ,0x4 b，0x8 b，0x8 a，0x4 a，0x4 a，0x8 x4 e，0x8 e，0x8 f，0x4 f，0x8 d，0x4 d，0x4 c，0x8 c，0x4 4 ,0x8 4 ,0x8 5 ,0x4 5 ,0 x8 7 ,0x4 7 ,0x4 6 ,0x8 6 ,0x8 2 ,0x4 2 ,0x4 3 ,0x8 3 ,0x4 1 ,0x8 1 ,0x8 0 x8 0,0x4 0};

VB6.0 PC与智能仪表COM通讯modbus协议485

VB通过串行端口方法向智能仪器发送了Modbus指令。
然后，您可以分析以完成返回信息。
Modbus读取注册说明。
表号通常调用设备ID。
设备ID为字节，值为0到2 5 5 通常不使用设备ID号0。
例如，指令是读取读取读取指令1 的说明的说明。
指令的注册如下：01 （读取寄存器）03 （read Read）03 （read regite寄存器）1 03 7 （CRC1 6 验证编号）。
CRC1 6 检查代码计划计算和指定特定说明和CRC1 6 确认的代码。
接收到信息后，您需要在指定位置拦截4 个数据，然后更改为浮点数。
VB提供了与串行类有关的方法。
我们可以检查相关文档以获取特定的实施详细信息。
标准CRC CRC验证算法可以用作CRC1 6 验证代码的CCITITTCHCRC-1 6 标准。
请执行特定的实施详细信息。
请参阅相关项目。
这样，您可以阅读所需的注册数据，以访问与智能工具和有效沟通的有效沟通。
CRC1 6 基于计算验证代码所需的特定信息。
应该注意的是，您需要这样做。
结果不直接可用；该程序必须在程序中实现。
简而言之，这是一种使用Modbus协议时通过VB中的串行端口与智能工具进行通信的有效方法。
具体的实施详细信息需要根据实际要求进行调整。

Mach3的ModBus如何设置能读取读出器里的数据。

Mach3 的Modbus，端口和站点没有什么特别的。
重要的一点是注册地址位于小数点。
例如，在Huichuan SV6 6 0P伺服驱动器上启用虚拟端口的地址为H3 1 00，并且支持的Modbus指令为X03 ，X06 ，X1 0接下来，在Mach3 中，您必须选择“保持注册”。
当输入寄存器地址1 2 5 4 4 时，寄存器为1 6 位，并输入该号码1 PS：如果要读取或写入3 2 位寄存器，请输入2 作为数字。
不建议一次读写多个寄存器，但是如果需要阅读和写作，则数字应与上面的1 6 位相对应。
至于如何在阅读MACH3 或在写作后如何处理Mach3 ，这取决于您自己。

modbus协议的4号指令是什么？

功能代码04 ：读取输入寄存器（模拟输入）