User manual

Hot Standby Support PTQ-104S Rev2 ♦ Quantum Platform
User Manual IEC 60870-5-104 Server for Quantum
Page 106 of 195 ProSoft Technology, Inc.
February 22, 2013
Example #2
 Stand-alone application scan time: 80 ms
 Data (state RAM + unlocated variables): 300 Kb
Note: In addition to the above times for system overhead, the PTQ-104S module may acquire from
100 ms to 300 ms of switch-over time. All configured data is to be updated as fast as the combined
asynchronous events occur based on the processor scan time, backplane transfer time, PTQ data
handling time and the 104 Server network update time. The 104 Server update time is based on
various other network timings that occur on an Ethernet network.
7.2 Setting Up the Modicon Quantum Hot Standby with Unity System
7.2.1 Overview
Schneider Electric is a leader in offering fault-tolerant, redundant systems, and
Hot Standby. Setting up a Modicon Quantum Hot Standby with Unity system
involves a number of processes.