160
Memory Initialization
Section 6-4
Select “Display History”.
Select “Yes”.
The display history record data is initialized.
During initialization, the message “Initializing”
is displayed.
S
If “No” is selected, the NT31/NT31C returns to the “MEMORY INIT. MENU”
screen without initializing the display history record data.
On completion of display history record data initialization, the message “Finished”
is displayed and the NT31/NT31C returns to the “MEMORY INIT. MENU” screen.
6-4-3
Initializing Alarm History Record Data
The alarm history record function continually checks the status of host bits that
have been designated in advance with a bit memory table, and records the time
when any of the bits is set to 1 (comes “ON”), and the number of times that each bit
comes ON.
The maximum number of records is 256 for “sort by occurrence” (order of error
occurrence) and 255 for “sort by frequency” (order of the number of times each
error has occurred).
Use the alarm history record initialization function to reset the alarm history record
data to 0, for example when the screen data has been changed, etc. Also, if
“Screen (Use Ring Buffer)” under “History Setting” in the “PT Environment Set-
tings” – “System Settings” has not been checked, no more records will be stored
after the maximum number of records has been kept, and therefore the records
must be periodically initialized. If “Screen (Use Ring Buffer)” is checked, when the
maximum number of records is reached the oldest record is deleted and the new-
est data is recorded.
Reference: The NT31/NT31C also allows the alarm history record data to be initialized by con-
trolling the PT status control area from the host. For details, refer to “Alarm history
initialization (bit 1)” (page 275).
Summary of Contents for NT31 Series
Page 1: ...Cat No V043 E1 2 Programmable Terminal NT31 31C OPERATION MANUAL...
Page 2: ...iii NT31 31C Programmable Terminal Operation Manual Produced March 1999...
Page 41: ...30 Before Operating Section 1 5...
Page 75: ...64 Using a Memory Unit NT31 NT31C without V1 Section 3 6...
Page 160: ...149...
Page 174: ...163...
Page 193: ...182...
Page 211: ...200...
Page 235: ...224 c Return to the screen on which screens are specified...
Page 262: ...251...
Page 360: ...349 It is not possible to control a gloval window by touch switch operation...
Page 468: ...457 254 255 0 2 7 1 4 5 3 3 0 0 0 5 9 8 0 3...
Page 476: ...465 Special Functions Section 7 16...
Page 495: ...484 OFF...
Page 610: ...599 Commands Responses Section 9 3...
Page 630: ...619 Examples of Actual Applications of Memory Link Section 10 2...