RS485 Input Application
This example shows an application of
QFIRE CTR-101
receiving data by RS485 communication.Introduction
The Simulation blocks in QFIRE Studio can be used to simulate an application with digital communication bus, e.g. RS485. The Message Source block is able to generate messages with specific payloads and message Header while triggering messages at given times. In this example, we use this block to generate the messages in the table below.
| Timestap(s) | Payload |
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
Simulation
The following diagram was designed to simulate this case.
Figure 1 - Application diagram
The data from table was added into Message Source block by configuring this block as shown in Figure 2.
Figure 2 - Message Source Dialog being fill
In the Task 0 Workspace, the diagram from Figure 3 was designed.
Figure 3 - Task 0 Diagram
As can be seen, there is a subsystem named Holder. This subsystem is responsible to hold the payload value until a new payload be received. The Holder diagram is shown in Figure 4.
Figure 4 - Holder diagram
After simulates this application, the received data are plotted in the Scope from Figure 5.
Figure 5 - Received data from RS485 communicaiton
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