Introduction
User Manual QT50 Doc ID 1321 version 2.0 Sept. 2018
Page
9 of 62
Term
Description
CAN/CANbus
Controller Area Network.
CANbus is a fieldbus which allows communication between a maximum of 127
actuators connected to the same network. It is not a “master-slave” network (ref.
Modbus), hence all the nodes in the network can actively send messages at their
own initiative. Communication is prioritized meaning that urgent messages are
transmitted and received before information with lower priority. Compared to
Modbus, CANbus has quite a few advantages:
More reliable communication
More nodes per network
More control and configuration features are available
Higher performance
CANopen
CANopen is a higher-level protocol and is running on top of the CAN protocol for
all Eltorque actuators.
The standard consists of an adressing scheme for the nodes on the CAN bus and
several small protocols for communicating with each node. In terms of the OSI
model, CANopen implements the levels above, including the network layer.
CCS
Central Control System.
Communication
Interface Box
Electronic device controlling the actuator according to signals from an overall
control system such as a PLC or other type of electronic controller.
Configuration
The set-up of parameters, which affects the actuator’s performance and behavior.
Digital Control
Simple control utilizing relays, on/ off switches and indicators. Allows only Open
or Closed functionality for a valve actuator.
DNV GL
Det Norske Veritas Germanischer Lloyd.
E3C
Eltorque Common Configuration Controller.
E-VCI
Eltorque Valve Control Interface
E-VCS
Eltorque Valve Control System offers a dedicated control system
for operation of Eltorque actuators.
Eltorque Valve Control System is suitable for installations where the operator
requires full control of all valves and pumps, and in addition monitor level,
temperature, flow and pressure.
Hazardous area
Area in which the permanent or periodical presence of explosive substances
causes a risk of explosion.
Products described in this manual are not suitable for use in hazardous areas.
Eltorque can deliver actuators for use in such areas if required. Please contact
your local representative for further details.
HMI
Human Machine Interface.
HSE
Health, Safety and Environment.
HVAC
Heath, ventilation and air condition
IACS
International Association of Classification Societies
IAS
Integrated Automation System.
ICS
Integrated Control System.
IMO
International Maritime Organization
LR
Lloyd’s Register.
MAST
Maximum allowable stem torque/thrust.
MD
Material Declaration.
MEPC
The Marine Environment Protection Committee
