What is PROFIBUS communication protocol?

PROFIBUS communicates via a serial protocol behind which complex machinery is housed to transport the data reliably through an industrial environment. The protocol defines the message design, the access to the network and fault control. There are ASICs (chips) available that coordinate the entire protocol.

How does PROFIBUS cable work?

The PROFIBUS DP network is a multi-master token network – that means when there are two or more masters in the system, a token giving the right to talk to the field devices is passed from master to master, and each gets a share of the communication time.

Is PROFIBUS Serial communication?

PROFIBUS is based on RS-485, which is a common serial communication method. In a PROFIBUS network, you have PROFIBUS masters and PROFIBUS slaves.

Is PROFIBUS RS485?

The RS485 balanced transmission used in PROFIBUS DP only allows 31 devices to be connected at once; however, more devices (up to 126) can be connected or the network expanded with the use of hubs or repeaters (4 hubs or repeaters to reach 126).

What do you need to know about PROFIBUS cable?

Connect devices such as sensors, programmable logic controllers, and actuators to an automated network. Choose the communication standard that matches your existing network. Flexible cable bends easily, but is not meant to be in constant motion.

How does PROFIBUS link controller to control system?

Via a single bus cable, PROFIBUS links controller or control systems with decentralized field devices (sensors and actuators) on the field level and also enables consistent data exchange with higher ranking communication systems.

What are the different types of PROFIBUS peripherals?

Profibus comes in four variants, each with a different purpose: PROFIBUS DP (Decentralized Peripherals) used to drive sensors and actuators via a central controller. Dataspeed up to 12 Mbit/s with twisted pair cables and fiber optic cables are an option.

When do you need to use active termination in PROFIBUS?

Without disconnecting anything you can check if the termination is done correct. The most common errors when installing a bus network like Profibus is termination. Profibus uses an extended way of terminating called active termination. This is needed when you have very long communication cables.