HIEE320639R1 LT8978bV1系统模块卡件
命令模拟输出单元代码2-5外部测量的模拟输出电平71浮点68微调模拟输出增益0模拟输出数字代码1与命令相同模拟输出单元编码2-5外部测量模拟输出电平72浮点69写入模拟输出传递函数0模拟输出数码与命令1模拟输出传递功能代码PACSystems*RX3i系统手册第12节GFK-2314T 2019年9月带HART通信的模拟模块562常见实践命令命令数据中的命令数据回复#功能字节数据类型字节数据类型70读取模拟输出端点值0模拟输出编号代码0模拟输出数量代码1模拟输出端点单元代码2-5模拟输出上限值浮点6-9模拟输出下限端点值浮点107写入突发模式发射机变量（用于命令33）0时隙0的发射机变量代码与命令1相同时隙1的发射机变量码2时隙2的发射机变量编码3时隙3的发射机变量编号108写入突发模式命令编号0突发模式命令号与命令109突发模式控制0突发模式控制码（0=退出，1=进入）与命令110相同无读取所有动态变量0主变量单位代码1-4主变量值浮点5第二变量单位代码6-9第二变量值浮点10第三变量单位代码11-14第三变量值浮点15第四变量单位代码PACSystems*RX3i系统手册第12节GFK-2314T 2019年9月模拟模块HART通信563常见做法命令数据中的命令数据回复#功能字节数据类型字节数据类型16-19第四变量值浮点11.6.7 HART通信状态来自现场从设备的每条消息包括两个字节的状态信息，也称为“响应码”。HART通信状态数据的格式如本节所示。11.6.7.1命令响应=1的响应数据如果第一个字节的最高有效位为1（通信错误），则输出HART通信中出现错误。其余位分别表示一个或多个错误条件：字节0 7 6 5 4 3 2 1 0通信错误=1奇偶校验错误超限错误成帧错误校验和错误保留（0）Rx缓冲区溢出未使用字节1 7 6 4 3 2 0未使用错误条件包括奇偶校验和超限错误。此外，现场设备将报告其接收缓冲区溢出。它还将报告消息内容与接收的校验和之间的任何差异。PACSystems*RX3i系统手册第12节GFK-2314T 2019年9月HART通信模拟模块564 11.6.7.2命令响应=0的响应数据如果第一个字节的最高有效位为0（命令响应），则输出HART通信正常完成。然后，第一个字节包含带有命令状态的整数值（命令响应代码）。第二字节包含现场设备状态，指示从设备的操作状态：字节0 7 6 5 4 3 2 1 0命令响应=0字节1 7 6 5 3 2 1 1 0现场设备故障配置已更改冷启动更多可用状态（见下文）模拟输出电流固定模拟输出饱和非主要变量超出限制主要变量超出限值位0-6包含整数值：0无命令特定错误1（未定义）2无效选择3传递参数太大4传递参数太小5接收的数据字节太少6设备特定命令错误7处于写入保护模式8-15多重含义，请参阅下一页16访问受限28多重含义，参见下一页32设备忙64命令未执行11.6.7.3现场设备状态代码第二字节中的现场设备状态码解释如下。现场设备状态代码意味着现场设备故障
command Analog output units code 2-5 Externally-measured analog output level71 Floating point 68 Trim analog output gain 0 Analog output number code 1 Same as command Analog output units code 2-5 Externally-measured analog output level71 Floating point 69 Write analog output transfer function 0 Analog output number code Same as command 1 Analog output transfer function code PACSystems* RX3i System Manual Section 12 GFK-2314T Sept. 2019 Analog Modules with HART Communications 562 Common-Practice Commands Data in Command Data in Reply # Function Byte Data Type Byte Data Type 70 Read analog output endpoint values 0 Analog output number code 0 Analog output number code 1 Analog output endpoint units code 2-5 Analog output upper endpoint value Floating point 6-9 Analog output lower endpoint value Floating point 107 Write burst mode transmitter variable (for command 33) 0 Transmitter variable code for slot 0 Same as command 1 Transmitter variable code for slot 1 2 Transmitter variable code for slot 2 3 Transmitter variable code for slot 3 108 Write burst mode command number 0 Burst mode command number Same as command 109 Burst mode control 0 Burst mode control code (0 = exit, 1 = enter) Same as command 110 Read all dynamic variables none 0 Primary Variable units code 1-4 Primary Variable value Floating point 5 Second Variable units code 6-9 Second Variable value Floating point 10 Third Variable units code 11-14 Third Variable value Floating point 15 Fourth Variable units code PACSystems* RX3i System Manual Section 12 GFK-2314T Sept. 2019 Analog Modules with HART Communications 563 Common-Practice Commands Data in Command Data in Reply # Function Byte Data Type Byte Data Type 16-19 Fourth Variable value Floating point 11.6.7 HART Communications Status Each message from a field slave device includes two bytes of status information, which is also referred to as the “response code”. The format of the HART communications status data is shown in this section. 11.6.7.1 Response Data with Command Response = 1 If the Most Significant Bit of the first byte is 1 (Communications Error), an error has occurred in the outgoing HART communication. The rest of the bits individually indicate one or more error conditions: Byte 0 7 6 5 4 3 2 1 0 Communication error = 1 Parity error Overrun error Framing error Checksum error Reserved (0) Rx buffer overflow Not used Byte 1 7 6 5 4 3 2 1 0 Not used Error conditions include parity and overrun errors. In addition, a field device will report an overflow of its receive buffer. It will also report any discrepancy between the message content and the received checksum. PACSystems* RX3i System Manual Section 12 GFK-2314T Sept. 2019 Analog Modules with HART Communications 564 11.6.7.2 Response Data with Command Response = 0 If the Most Significant Bit of the first byte is 0 (Command Response), the outgoing HART communications completed normally. The first byte then contains an integer value (the Command Response code) with the command status. The second byte contains the field device status, indicating the operational state of the slave device: Byte 0 7 6 5 4 3 2 1 0 Command Response = 0 Byte 1 7 6 5 4 3 2 1 0 Field device malfunction Configuration changed Cold start More status available (see below) Analog output current fixed Analog output saturated Non-primary variable out of limits Primary Variable out of limits Bits 0-6 contain an integer value: 0 no command-specific error 1 (undefined) 2 invalid selection 3 passed parameter too large 4 passed parameter too small 5 too few data bytes received 6 device-specific command error 7 in write-protect mode 8-15 multiple meanings, see next page 16 access restricted 28 multiple meanings, see next page 32 device is busy 64 command not implemented 11.6.7.3 Field Device Status Codes The Field Device Status codes in the second byte are explained below. Field Device Status Code Meaning Field device malfunction
