Mitsubishi Electric MELSEC Q80BD-J71GF11-T2, User Manual

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APPX
Appendix 1 Precautions for Accessing Redundant CPU System
181
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Details of the special relay and special registers to be monitored when estimating the
occurrence of path switching
No. Name Description Description details
SM1600 Other system error flag OFF: No error
ON: Error • Turns ON when an error occurs by redundant system error check. (Turns ON when
any of bits for SD1600 turns ON.)
• Remains OFF when no errors are present.
SD1590 No. of module for which
system switching request
is issued from the network
module in own system No. of module for which
system switching request
is issued from the network
module in own system • Any of the following bits turns ON corresponding to the No. of the module for which
system switching request is issued from the network module in own system.
• Turned OFF by the system after the error of the relevant module is resolved by the
user.
• For No. of module for which system switching request is issued from the network
module in another system, refer to SD1690.
SD1690 No. of module for which
system switching request
is issued from the network
module in another system No. of module for which
system switching request
is issued from the network
module in another system • Any of the following bits turns ON corresponding to the No. of the module for which
system switching request is issued from the network module in another system.
• Turned OFF by the system after the error of the relevant module is resolved by the
user.
• For No. of module for which system switching request is issued from the network
module in own system, refer to SD1590.
SD1590 0 0/1 0/1 0
b15 b11 b1 b0
0 : OFF
1 : ON Each bit
Disabled since a CPU
module uses two slots. Module No.0 :
Module No.1 :
Module No.11:
Module to the right of a
CPU module
Rightmost module on
12-slot base unit (Q312B)
to
to
SD1690
0
0/1 0/1 0
b15 b11 b1 b0
0 : OFF
1 : ON Each bit
Disabled since a CPU
module uses two slots. Module No.0 :
Module No.1 :
Module No.11:
Module to the right of a
CPU module
Rightmost module on
12-slot base unit (Q312B)
to
to