- 28 -
Example 1: Transmit machine run time with 0.00 hour resolution
Application:
Track two machine run times in hours. Channel A time will have two decimals, will
be per job for billing purposes, and will be reset at end of each job. Channel B time will have no
decimals, will be total accumulated hours for machine maintenance purposes, and will be reset
following maintenance. Turn on a warning light after 1000 hours of run time.
Solution:
•
Apply 60 Hz power cycles to channels A and B and measure time by counting pulses using
the totalizer mode, which can restore total following loss of power. There will be 216,000
pulses/hour or 0.0000046296 hours/pulse.
•
Under Input+Display tab, set Mode to Total, Function to “A, B” and Gate Time to 0 sec. Set
“Power-On Total” to “Restore Total” to retain total in event of power loss.
•
Under Scaling tab for Channel A, set decimal point to 2 places. If “Scale, Offset” is selected,
set Scale to +0.46296 and Multiplier to 0.001 for time in hundredths of an hour per 60 Hz
pulse. If Coordinates is selected, enter 216000 pulses for 100 hundredths of an hour.
•
Under Scaling tab for Channel B, set decimal point to 0 places. If “Scale, Offset” is selected,
set Scale to +0.46296 and Multiplier to 0.00001 for time in hours per 60 Hz pulse. If
Coordinates is selected, enter 216000 pulses for 1 hour.