Loop Leader PD6620 Series Loop-Powered Rate/Totalizer Instruction Manual
37
Stopwatch (
STPWATCH
)
The stopwatch function may be used to manually run and control a process for a specific time interval up
to 99 hrs., 59 min, and 59 seconds. The stopwatch function may be assigned to any relay. There are
three settings needed to use the function effectively.
1. Assign stopwatch to either top or bottom display line
2. Assign the open collector or relay to control the process (on/off)
3. Assign a function key or digital input to start/stop the stopwatch
Application Example
In order to maintain consistency of a product, it is necessary to take and test samples at different times
throughout the day. The stopwatch function is used to open and close a solenoid valve to know the exact
amount of time needed to complete the desired sample. Once this is determined, the timer function can
be used to automatically take a sample (batch) based on the time determined using the stopwatch func-
tion.
Setup:
Assign the following to
Stopwatch Function
•
Bottom display line
•
Relay 1
•
F3: Start/Stop
Procedure
•
Press F3 to start the stopwatch; relay 1 turns on and the process starts running.
•
Press F3 to stop the stopwatch; relay 1 turns off and the process stops.
•
The bottom display indicates the time it took to complete the sample.
Relay Information (
INFO
)
The relay information menu shows run times and cycle counts for each relay. These values may be
cleared at any time by selecting the
Clear
option (
CLEAR?
).
INFO
RELAY 1
RELAY
RUNTIME
Flashes
Momentarily
TIME
195.0 H
CYCLE
COUNT
CYCLE
51
RLY 1
CLEAR?
Flashes
Momentarily
