★★★产品介绍:
MTL838B-MBF具有Modbus输出的经典MTL830B范围多路复用器无需隔离每个仪器回路。通过双冗余数据高速公路通信多个危险区域传感器的状态,将安装布线的成本降低多达 50’%。
节省安装危险区域电缆的成本
减少安装时间、空间和重量
使用状态报告系统快速检测问题
传感器故障检测和故障安全驱动选项
串行数据输出到主机控制系统
AI到Modbus控制器
MTL838B-MBF Modbus从站只会在需要的时候传输到网络上
的主人。奴隶从不发送未经请求的信息。
如果从属服务器不能执行请求的操作,那么它将响应一个错误
消息。此错误消息(称为异常响应)指向
主响应从服务器的地址,它被要求执行的操作
并指出了为什么行动无法完成。
如果在接收消息时发生错误,则忽略该消息。这样可以确保
一个奴隶没有采取本来是要另一个奴隶采取的行动
除了被要求做的事,不做其他的事。信息应该是
如果被忽略,主服务器将知道它的查询没有被正确接收
未收到响应。

MTL838B-MBF
MTL838B-MBF Modbus没有定义消息中数字数据的编码。这是
由制造商建立-参见第13页的数据编码和缩放。
Modbus端口通常采用RS232C兼容串行接口,虽然RS422
RS485接口。所使用的接口类型定义了连接器
引脚,电缆和信号水平;这些在Modbus中没有定义。同样的,
传输速率和奇偶校验在Modbus中没有定义,将取决于
所使用的串行接口和每个制造商提供的选项
Modbus组件。转换器是可用的,允许组件采用
(例如)一个RS485接口连接到一个标准的Modbus控制器
RS232接口。有关更多信息,请参阅第19页的数据转换器。
Modbus将支持从地址1到247 (JBUS 1到255)的多达247个从站
地址0为广播消息保留。在实践中,奴隶的数量
可以使用的地址由通信决定
★★★英语介绍:
The MTL838B-MBF classic MTL830B-range multiplexer with Modbus output eliminates the need to isolate each instrument loop. Reduce the cost of installing cabling by up to 50’% by communicating the status of multiple hazardous area sensors with dual redundant data highways.
Save the cost of installing hazardous area cables
Reduce installation time, space and weight
Use a status reporting system to quickly detect problems
Sensor fault detection and fault safe driver options
Serial data output to host control system
AI to Modbus controller
The MTL838B-MBF Modbus slave station transfers to the network only when needed
The master. Slaves never send unsolicited messages.
If the slave server cannot perform the requested operation, it responds with an error
Message. This error message (called an exception response) points to
The primary response is the address of the server from which it is asked to perform the operation
And pointed out why the action could not be completed.
If an error occurs while receiving the message, the message is ignored. This will ensure that
One slave did not do what another slave would have done
Do nothing but what you are asked to do. The message should be
If it is ignored, the master server will know that its query was not received correctly
No response received.

MTL838B-MBF
MTL838B-MBF Modbus does not define the encoding of the digital data in the message. This is
Established by the manufacturer – see data encoding and scaling on page 13.
Modbus ports usually use RS232C compatible serial interfaces, although RS422
RS485 port. The type of interface used defines the connector
Pin, cable and signal levels; These are not defined in Modbus. In the same way,
Transfer rate and parity are not defined in Modbus and will depend
The serial interface used and the options provided by each manufacturer
Modbus components. Converters are available, allowing components to be adopted
For example, an RS485 interface is connected to a standard Modbus controller
RS232 interface. For more information, see Data Converters on page 19.
Modbus will support up to 247 slave stations from addresses 1 to 247 (JBUS 1 to 255)
Address 0 is reserved for broadcast messages. In practice, the number of slaves
The addresses that can be used are determined by the communication
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