VIBRO-METER VM600 RPS6U 200-582-500-013 remote I/O

Description

VIBRO-METER VM600 RPS6U 200-582-500-013 remote I/O

VIBRO-METER VM600 RPS6U 200-582-500-013 remote I/O

From a software perspective, there should be functional blocks in the controller for reading and writing fieldbus signals. In DCS systems, remote I/O uses a more common HART bus. For example, for on-site transmitters that are relatively far from the controller cabinet, the signals from 16 transmitters are grouped together and sent to the controller using a HART bus. The controller reads the signals from the 16 transmitters simultaneously. The distance between the controller and the transmitter can be more than 1 kilometer. Almost all DCS systems imported from the United States and Europe have a HART protocol board. In practical applications, remote signals are quite common. For example, in cement factories, the distance between the kiln head and kiln tail of rotary kilns is several hundred meters. If two nodes are set up on the network, two sets of interface modules are required, and the cost of interface modules is relatively high. If one node is set up, remote I/O is required regardless of whether the nodes are arranged at the kiln head or kiln tail in geographical location.
The second level network is the communication between controllers, connecting three types of controllers that complete different tasks on a single bus, known as the control bus. There is no limit to the number of different controllers on the control bus. In addition to three different controller modules, there are also interface modules for the DCS network on this bus. On the control bus, data can be called between controllers. Make the combination between analog quantity and switching quantity very good. The control bus is not available in every DCS system, and various controllers can be connected to the DCS network separately. Data calls between controllers should be made through the DCS network. The speed situation of the control bus is similar to that of the I/O bus. Usually between tens of K and a few megabytes. When the capabilities of the CPU and memory are relatively strong, both the logic operation of the switching value and the acquisition function of the analog value are completed in one controller. There is only one form of controller on the control bus. Its protocol adopts carrier monitoring, broadcast transmission, and a protocol similar to Ethernet.