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Alarm Lists (NV4W/NV3Q) Section 7-11
3. Set the alarm history control.
Alarm History Control Words (2 Words)
Group Monitor Stop Bits: Monitoring will be stopped if the bit is turned
ON from the PLC.
Group Memory Overflow Flags:The flag will turn ON if the number of sampled
alarms exceeds the number of records to
store that is specified in the NV Configuration.
The flag will remain ON until memory is
cleared.
Group Memory Clear Bits: The recorded data will be cleared if the bit is
turned ON from the PLC. Do not turn OFF a
bit until the corresponding Memory Cleared
Flag turns ON.
Group Memory Cleared Flags: After PT memory has been cleared, the corre-
sponding bit will be turned ON from the PT.
The flag will not turn OFF until the Memory
Clear Bit has been turned OFF.
Set the basic setup. After
completing the settings, click
the OK Button to end setting
the PT Configuration.
Alarm History Control: On
Address: W16
Bits
Word
1514131211109876543210
n
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Group 1 Memory Overflow Flag
Group 0 Memory Overflow Flag
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Group 1 Monitor Stop Bit
Group 0 Monitor Stop Bit
n+1
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Group 1 Memory Cleared Flag
Group 0 Memory Cleared Flag
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Reserved. (Do not use.)
Group 1 Memory Clear Bit
Group 0 Memory Clear Bit
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