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AC31控制器构成冗余系统
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BSH 15RK 7002 yraunaJ CS
1 - TNERF BBA ©
Concept
Possibility with low end PLC to offer a hot stand-by
solution
A hot stand-by CPU should be able to take care
about the application without reset of inputs/outputs -
no interruption in the process
Easy to handle
Use standard I/O
Hot Stand by CPU can only manage I/O on CS31 bus
B (built-in I/O or centralized I/O are managed normally
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2 R without hot stand-by function)
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© S Hot stand-by is not redundancy
Configuration
Hot Stand by
CPU master M1 Hot stand-by CPU : HSB1
CS31 Bus
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T 0 2 Hot stand-by CPU’s are necessary called M1 HSB1
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Configuration
Master CPU M1 :
System constant %KW0.0 : -5
Hot Stand-by CPU HSB1
System constant %KW0.0 : -3 : HSB1 takes I/O control after 30seconds if
no activity on CS31 bus. It uses if system has to run on power supply ON
System constant %KW0.0 : -7 :HSB1 takes I/O control only if the master
M1 started and failed. It uses if the system must run normally at least o
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