48
3-6-9 Power Interruption Time
Words A012 and A013 contain, in BCD format, the time at which power was in-
terrupted, as shown in the following table. The power interruption time is up-
dated every time the power is interrupted.
Word
Bits
Contents
Possible values
A012
00 to 07
Seconds
00 to 59
08 to 15
Minutes
00 to 59
A013
00 to 07
Hours
00 to 23 (24-hour system)
08 to 15
Day of month
01 to 31 (adjusted by month and for leap year)
Note During duplex operation, the power interruption time in the active CPU Unit will
not agree with the power interruption time in the standby CPU Unit.
3-6-10 Number of Power Interruptions
Word A014 contains the number of times that power has been interrupted since
the PC was first turned on. The number is in 4-digit BCD, and can be reset by
writing #0000 to word A014.
Note During duplex operation, the number of power interruptions in the active CPU
Unit will not agree with the number in the standby CPU Unit.
3-6-11 Service Disable Bits
Words A015 and A017 contain control bits that disable I/O servicing to certain
Units and periodic refreshing. Turn these bits ON and OFF in the program. The
service disable bits are automatically turned OFF when power is turned on or PC
operation is stopped.
Bits A01500 through A01515 can be turned ON to stop service to CPU Bus Units
numbered #0 through #15, respectively. Turn the appropriate bit OFF again to
resume service to the CPU Bus Unit.
Note During duplex operation, the status of the CPU Service Disable Bits in the active
CPU Unit will not agree with the same bits in the standby CPU Unit.
Bit A01703 can be turned ON to stop Host Link System servicing. Turn OFF
again to resume service to the Host Link System.
Bit A01704 can be turned ON to stop service to Programming Devices. Turn
OFF again to resume service to Programming Devices.
Bit A01705 can be turned ON to stop SYSMAC BUS refreshing. Turn OFF again
to resume SYSMAC BUS refreshing.
3-6-12 Message Flags
When the MESSAGE instruction (MSG(195)) is executed, the bit in A099 corre-
sponding to the message number is turned ON. Bits 00 through 07 correspond
to message numbers 0 through 7, respectively.
3-6-13 Error Log Area
Words A100 through A199 contain up to 20 records that show the nature, time,
and date of errors that have occurred in the PC. The Error Log Area will store
system-generated or FAL(006)/FALS(007)-generated error codes. Refer to
Section 6 Troubleshooting in the CVM1D PCs Installation Guide for details on
error codes.
CPU Service Disable Bits
Host Link Service Disable
Bit
Programming Device
Service Disable Bit
SYSMAC BUS Refresh
Disable Bit
Auxiliary Area
Section 3-6
Summary of Contents for CVM1D
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