AW Gear Meters MX 9000 - Manual (Page 29)

MX 9000 Process Monitor
Operation and Programming Manual
28
MX 9000 User Manual, Rev. 2.0 7/16/2013
LIMIT / Pulse output programming
Figure 17: Limit/Pulse Output Programming
Two relay outputs and an opto coupler frequency output are available on option cards 1 and 2. Refer to
schematics on pages 12 – 13 for connection diagrams. The frequency output can source or sink a
maximum of 50 mA at a maximum voltage of 30 VDC. See page 9 for relay contact ratings.
Connection polarity: collector (+), emitter (-).
From the first screen, the output to be programmed is selected. All three outputs can be independently
setup and if any of the outputs are not to be used, they can be turned off. Limit 1 and Limit 2 can be
configured as a rate monitor, to trigger on a set value of the Total or Grand Total, ratio differences
between the two inputs (either warning or alarm) or cycle output. The Frequency Out can only be used
to output the incoming frequency from the flow meter.
To exit the LIMIT programming screen, press the
UP or DOWN button until Select Limit option shows
Exit. Then press the EXIT button.
Limit 1 & Limit 2
Turn Limits OFF
To turn either of the Limits off, choose the OFF Limit Type and press ENTER . The corresponding Limit
relay output will now stay off regardless of any variable changes.
Cycle Output (pulsed output)
Select Limit Screen
Figure 18: Cycle Output
The CYCLE OUT limit function provides an incremental output signal for a remote totalizer, typically at a
lower resolution and frequency. Assigning a limit to the CYCLE OUT function toggles the state of the
limit output whenever the TOTAL increments by the programmed cycle amount. The output remains ON
until the cycle amount accumulates and does not turn OFF until the cycle amount accumulates again as
represented in the figure below. The total accumulated between a rising and falling edge is the cycle
value. The total accumulated between any two rising edges is twice the cycle value. You enter the cycle
value in programmed engineering total units.
Notice
Sel ect Li mit
> Li mit 1
Sel ect Li mit Type
OFF
Enter Cycl e Volume
0001000.00 GAL