1. LabVIEW EPICS Client I/O Server
National Instruments Contacts:
Arun Veeramani (Product Marketing)
Jenifer Loy (Product Strategy)

2. EPICS Software Architecture
Channel Access Protocol for non-real-time data (10 Hz update)
Analog and digital I/O for deterministic data transfer
Each IOC holds a subset of EPICS database variables
Channel Access Protocol
Analog &
Digital I/O
IOC
(I/O Controller)
I/O HW
Supervisory
Control
Systems

3. IOC (I/O Controller) Software Architecture
Network Traffic
(Channel Access Protocol)
Channel Access
Protocol Server
Sequencer
(Finite State Machine)
Publishes values from the database onto the network using Channel Access protocol.
Reads values from the database to drive state changes in the IOC control application.
EPICS Database
Database
Engine
Write I/O values to database. Default update rate is 10 Hz. Can be as fast as 25 Hz.
Hardware
EPICS Node

4. IOC Software with LV EPICS Client I/O Server
Network Traffic
(Channel Access Protocol)
Channel Access
Protocol Server
Sequencer
(Finite State Machine)
LV EPICS Client
I/O Server
Publishes values from the database onto the network using Channel Access protocol.
Reads values from the database to drive state changes in the IOC control application.
EPICS Database
LabVIEW Shared Variable Engine
Database
Engine
LabVIEW Application
Write I/O values to database. Default update rate is 10 Hz. Can be as fast as 25 Hz.
Hardware
Hardware
EPICS Node
LabVIEW Node – Windows

5. LabVIEW EPICS Client I/O Server
Runs on LabVIEW for Windows
Requires LabVIEW Datalogging & Supervisory Control Module
Compatible with LabVIEW 8.0 & 8.20
Available now with LV DSC beta

6. Channel Access Protocol
EPICS System
Supervisory
Control
Systems
Supervisory
Control
Systems
Channel Access Protocol
IOC
EPICS
Database
I/O HW
IOC
EPICS
Database
I/O HW
IOC
EPICS
Database
I/O HW
IOC
EPICS
Database
I/O HW
Analog &
Digital I/O
Analog &
Digital I/O
Analog &
Digital I/O

7. EPICS System with LabVIEW Nodes
Supervisory
Control
Systems
LV RT
LV Shared
Variable Node
I/O HW
Analog &
Digital I/O
Shared
Variable
LV DSC
LV Shared Variable Engine
EPICS Client I/O Server
Channel Access Protocol
IOC
EPICS
Database
I/O HW
IOC
EPICS
Database
I/O HW
I/O HW
Analog &
Digital I/O
Analog &
Digital I/O
Control System
Experiment Station

8. For more information…
Register for LabVIEW DSC beta to get access to the EPICS Client I/O Server for LabVIEW
National Instruments contacts:
Your local NI sales engineer
Arun Veeramani (Product Marketing)
Jenifer Loy (Product Strategy)