Fleet Control: governed commands to equipment
Fleet Control is generally available. Once it is switched on for your account, a person sends supervisory commands to equipment over OPC UA and Modbus TCP, under the same risk checks and record as every configuration change. After a setpoint write, the gateway reads the point back and the record shows whether the device holds the value sent: the controller's answer, not a measurement of the plant. Commands to many assets go out in stages, one asset first, and by default a failure there stops the rest. A site or gateway switched to local control refuses commands until control is handed back. Method calls go out only over OPC UA and only for methods that take no arguments. Safety functions, emergency stop among them, stay on your hard-wired safety chain and are never commandable.