Engineering Link Mode

Overview

The engineering link mode lets you restrict the connection to M580 controllers to certain protocols to help secure communications with Control Expert, Control Expert Classic, and HMI panels/software. It is available for M580 controllers with firmware version 4.20 and subsequent supporting versions.

M580 Controller Connection Settings

The engineering link mode that is selected in the Security tab defines the protocols and modes to access the control project in online mode as described in the following table.

—		Secure engineering link⁽¹⁾	Engineering link⁽¹⁾		HMI/SCADA⁽²⁾
Protocols		HTTPS or HTTPS via USB	Modbus TCP or Modbus TCP via USB		Modbus TCP
Connection mode		Monitoring and programming modes	Programming mode	Monitoring mode	–
Engineering Link Mode	Full Access	Yes	Yes	Yes	Yes
	Filtered	Yes	No	Yes	Yes
	Enforced	Yes	No	No	No
⁽¹⁾ Connection with Control Expert or Control Expert Classic. ⁽²⁾ Connection with HMI panels/software.

NOTE: For more information on drivers/protocols, refer to the topic describing the types of connections with controllers

NOTE: For more information on the programming and monitoring modes, refer to Services in Online Mode.