13
MULTIPLE CPU SYSTEM CONCEPT
13.7 Operation at CPU Module Stop Error
13 - 24
9
UTILITY OPERATION
10
FUNCTIONS AND
PROGRAMMING
11
OVERVIEW OF
MULTIPLE CPU
SYSTEM
12
MULTIPLE CPU
SYSTEM
CONFIGURATION
13
MULTIPLE CPU
SYSTEM
CONCEPT
14
COMMUNICATIONS
BETWEEN CPU
MODULES
15
PARAMETERS
ADDED FOR
MULTIPLE CPU
16
PRECAUTIONS FOR
USE OF AnS SERIES
MODULE
13.7 Operation at CPU Module Stop Error
The entire system will behaves differently depending on whether a stop error occurs in
CPU No.1 or any of CPU No.2 to No.4 in the multiple CPU system.
(1) When a stop error occurs in CPU No.1
When a stop error occurs in the CPU module No. 1, a multi CPU error (error code:
7000, MULTI CPU DOWN) occurs in all the other CPU modules and the multiple CPU
system stops. ( POINT on the next page)
(2) When a stop error occurs in CPU other than No.1
When a stop error occurs in a CPU module other than CPU No. 1, whether the entire
system is stopped or not is determined by the "Operating mode" setting on the
<<Multiple CPU setting>> tab of the C Controller setting utility.
The default is set for all CPUs to be stopped with a stop error.
When it is not desired to stop all CPUs at occurrence of a stop error in a specific CPU
module, remove the "All stations stop by stop error of CPU n" checkmarks of all
CPUs.
(a) When "All station stop by stop error of CPU 'n'" is set
When a stop error occurs in the CPU module corresponding to "All stations stop
by stop error of CPU n", a stop error, i.e. multi CPU error (error code: 7000, MULTI
CPU DOWN) occurs in all the other CPU modules, and the multiple CPU system
stops. ( POINT on the next page)
(b) When "No station stop by stop error of CPU 'n'" is set
When a stop error occurs in the CPU module corresponding to "No stations stop
by stop error of CPU n", a continue error, i.e. multi CPU error (error code: 7020,
MULTI CPU ERROR) occurs in all the other CPU modules, and operations are
continued.
Figure 13.26 Operation setting for stop error
Operating mode
All stations stop by stop error of CPU n:
"All stations stop by stop error of CPU n" has been set
All stations stop by stop error of CPU n:
"No stations stop by stop error of CPU n" has been set
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