Rockwell Automation 1772-LS_LSP,D17726.8.6 PROG/OPER MANUAL-MINI PLC-2/05 - Manual (Page 224)

Program Troubleshooting
Chapter 19
19-3
mode. When in remote test, or run/program, the program can override the
bit status in the next scan.
Use the [
←
] and [
→
] keys to cursor over to any bit. With the cursor on the
desired bit, you can change its status by pressing 1,0.
To terminate this function, press [CANCEL COMMAND].
ATTENTION: If it is necessary to change the status of any data
table bit, be sure that the consequences of the change are
thoroughly understood. If not, unpredictable machine operation
could occur directly or indirectly as a result of changing the bit
status. Damage to equipment and/or injury to personnel
could result.
The contact histogram function displays the on or off history of a specific
data table bit. You can monitor this function on the industrial terminal. It
can also be printed by a peripheral printer. If you use a peripheral device,
set the baud for channel C of the industrial terminal.
Data table bits, excluding those in the processor work areas, can be
accessed by the contract histogram command. The on/off status of the bit
and the length of time the bit remained on or off (in hours, minutes and
seconds) is displayed. The seconds are displayed within 0.01 second
(10 ms) resolution.
There are two operating modes for the contact histogram, shown in
Table 19.B:
Contact Histogram