8 External Control Overview:
At Standard Bots, External control refers to the ability to command and monitor our collaborative robots using external devices—most commonly a PLC or a PC based system. This setup allows our robots to function as part of a larger automated cell, communicating in real-time with other equipment such as HMIs, conveyors, presses, vision systems, and safety hardware. This setup allows for seamless communication between the robot and external systems, enabling precise coordination, automated workflows, and enhanced safety tailored to our specific applications.
Why use External Controls?
- Enables operators to start or stop robot cycles directly from HMIs via a PLC
- Coordinates robot actions with other equipment in the automated cell, such as presses, conveyors, and safety devices
- Enhances system flexibility by allowing centralized control and integration
- Supports advanced decision-making by interfacing with vision systems, AI, or higher-level control logic
The steps within our External Control and what they do:
| Step |
|---|
| Initialization & Handshake |
| Robot Ready Signal |
| External Start Command |
| End-of-Cycle & Reset |
| Safety & Fault Handling |
Common External Interfaces:
Type | Typical Use Cases | Notes Digital I/O | Simple signals like Start, Stop, or Ready | Fast, reliable, low data volume Modbus TCP | Connect to PLC or HMI using industrial protocol | Widely used in automation Safety Inputs | E-stop and safety relay signals | Must be hardwired and safety rated
Example:
Scenario: A PLC or control box sends a signal to start or stop the RO1 when a part is present and safety conditions are met.
Hardware setup: DI1: Start signal DI2: Stop signal DO1: Robot ready (feedback to PLC)
Robot Configuration: Go to settings > I/O manager Assign DI1 > Start Program Assign DI2 > Stop Program
Assign DO1 > Ready
Set robot to “External Control Mode”