Channel Access

Sequencer

Channel Access Client

LAN/WAN

Operator Interface

Channel Access Client

Database Links

Channel Access Client

Channel Access Server

EPICS Process Database

Performance:

68040 over 10 Mbit Ethernet

Gets

Propagation Delay 2 mS

Throughput 7.8K /sec

Puts

Propagation Delay 1 mS

Throughput 17K /sec

Monitors

Propagation Delay Dependent

Throughput 10K / sec

(Typically 10% channels have monitors)

(memory use in IOC - 2 Meg / 60 connections)

(30% network load for 10K monitors / second)

Increase bandwidth with Routers, Bridges, Higher speed networks and EPICS gateway

TCP/IP & UDP