Setting The System (System A Or System B) - Mitsubishi Electric MELSEC iQ-R Series User Manual
Process cpu module
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Also See for MELSEC iQ-R Series:
- Programming manual (2110 pages) ,
- User manual (682 pages) ,
- Reference manual (498 pages)
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5.5
Setting the System (System A or System B)
Set the system A or B using the engineering tool and write the system settings to the CPU module.
[Online] [Redundant PLC Operation] [System A/B Setting]
Setting procedure
*1 If the system A/B setting is set to the Process CPU that is not running in redundant mode, powering off and on the system or resetting
the CPU module turns off the SYS A LED or SYS B LED of the redundant function module. Proceed to the next step (Writing Data to the
Programmable Controller).
Besides the method that uses the engineering tool, the system A/B setting can be automatically set by the
systems themselves.
Setting one system as system A and bringing it into a tracking communicable state can automatically set the
other system as system B, and vice versa.
In the system that is automatically set as system A or system B, the original system A/B setting will be
overwritten. This can be checked in the event history. (Event code: 00700)
• When a system with no system A/B setting is connected to the system that is set as system A, the system
with no system A/B setting is automatically set as system B. (This event is not recorded in the event history.)
• When a system that is set as system A is connected to another system that is also set as system A, the
system that is powered off and on or whose CPU module is reset is automatically set as system B. (This
event is recorded in the event history.)
1.
Set the CPU module to the STOP state.
2.
In the "System A/B Setting" window, select system A or
system B for the own system.
3.
Click the [Execute] button.
4.
Click the [Yes] button on the window shown on the left.
Check that the SYS A LED or SYS B LED of the
redundant function module flashes in accordance with
the setting.
5.
To change the system A/B setting, power off and on the
system or reset the CPU module, and then click the
[OK] button. Check that the SYS A LED or SYS B LED
of the redundant function module turns on in
accordance with the new setting.
5 PROCEDURE FOR STARTING UP A REDUNDANT SYSTEM
5.5 Setting the System (System A or System B)
* 1
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