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8 MULTIPLE CPU SYSTEM FUNCTIONS
8.2 Operation Settings
151
8
Settings for synchronized startup
By synchronizing start-up time of each CPU module, operations can be started at the same time in the entire multiple CPU
system. An interlock program that monitors the start-up time for each CPU module other than C Controller module is not
required. However, this setting delays the system start-up.
An interlock program that monitors the execution completion of the script file is required for a C Controller module in a multiple
CPU system configuration. The execution completion of the script file can be checked by the READY LED status indication.
The status indication of the READY LED can be checked by following methods:
• Using the C Controller module dedicated function (CCPU_GetLEDStatus).
• Checking the special register (SD201).
[System Parameter]
[Multiple CPU Setting]
[Operation Mode Setting]
[Synchronous Startup Setting]
Window
Displayed items
• Group setting for start-up synchronization is available. For example, a setting in which only CPU No.1 and
No.2 start synchronously in a multiple CPU system with four CPU modules is possible.
• If a reserved (empty) CPU is specified to synchronize, the reserved CPU is ignored and the other CPU will
be started.
• This setting is designed to access each CPU module with no interlock in the multiple CPU system. It is not
intended to be used for starting operation at the same time among the CPU modules after the startup.
Clock data
The clock data in CPU No.2 to No.4 are synchronized with the clock data set to CPU No.1 automatically. (Even if the clock
data is set to each CPU, they will be overwritten). Therefore, the system-unified clock data can be used only by setting the
clock data for CPU No.1. (
As with the clock data, the time zone setting for CPU No.2 to CPU No.4 follows the setting configured to CPU
No.1. (
Item
Description
Setting range
Default
PLC No.1
Set the CPU No. of which start-up time is to be synchronized in a multiple CPU
system.
• Synchronize
• Do not
Synchronize
Synchronize
PLC No.2
PLC No.3
PLC No.4
Содержание MELSEC iQ-R C R12CCPU-V
Страница 1: ...MELSEC iQ R C Controller Module User s Manual Application R12CCPU V ...
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Страница 32: ...30 3 MEMORY CONFIGURATION OF C Controller Module 3 4 Files MEMO ...
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