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7. AUXILIARY FUNCTION
7.17.3 Interface
(1) System Command/Status Bit
System command/status bits related to alarm history function are shown below.
System command System status
Address Bit Abbreviation Signal name Address Bit Abbreviation Signal name
03E1 0 SMPS Sampling start 0451 0 SMPW Waiting for sampling trigger
1
Reserved
1 SMPO Sampling is being performed
2 2 SMPF Sampling is complete
3 3 SMPE Sampling Error
4 4 Reserved
5 5 AHINF Alarm history information
6 6
Reserved
7 7
System command System status
Address Bit Abbreviation Signal name Address Bit Abbreviation Signal name
03F7 0 ALHR Alarm history read command 0467 0 ALHRF Alarm history read complete
1 Reserved 1 ALHRE Alarm history read error
2 ALHI
Alarm history initialization
command
2ALHIF
Alarm history initialization
complete
3
Reserved
3ALHIE
Alarm history initialization
error
4 4
Reserved
5 5
6 6
7 7
(a) Details concerning system command bits
Abbreviation Signal name Function details
ALHR Alarm history read
command
[Function]
Reads the alarm history stored in the alarm history buffer area (flash ROM) to the
alarm history table on the dual port memory.
[Operation]
When the alarm history read command signal (ALHR) is turned on, the alarm history
for the page number set as the alarm history read page number is read to the alarm
history table. When reading of alarm history is complete, the alarm history read
complete signal (ALHRF) is turned on or alarm history read error signal (ALHRE) is
turned on.
ALHI Alarm history
initialization command
[Function]
Initialization of the alarm history stored in the alarm history buffer area(flash ROM)
[Operation]
When the alarm history initialization command signal (ALHI) is turned on, the alarm
history is initialized and the number of valid alarm history events are 0 cleared.