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6   Maintenance and Troubleshooting
NB-series Programmable Terminals Startup Guide Manual(V109)
6-3 Troubleshooting
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6-3-1  Countermeasures for errors  
Use two Command Button as the Page Up/Down button, designate the button address the 
same as the component for display, and set as follows in the properties page of Command 
Button.
Note Incremental upper limit is set as the number of events which you need to record, while the decre-
mental lower limit is recommended to be set to 0.
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Why is there one event inquiring record less
When the customer set the Page Up/Down Switching for [Command Button component], the 
lower limit is set to 1, which will cause the records to be one less. The correct setting is as 
follows: