MERRICK MC3 90.10.EX, Operation And Maintanance Manual

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MC³ 90.10.EX O&M Manual - 25 -
Panel Meter
This button sets the upper and lower limits for the Panel Meter monitor. This is an analog input
that is available for monitoring another device such as the current used by a VFD.
Output (NOT USED)
Display Parameters
This menu allows you to customize the display settings.
Invert Display
This button allows you to invert the pixel color of the display. An example is shown below.
to
Display Numeric
These parameters are used to dampen the values for the feedrate and Setpoint. Increasing the
value will cause more dampening.
Feedrate Dampening
The Feedrate dampening factor controls a feedrate low pass filter for the displayed feedrate and,
if used, the corresponding analog output. It does not affect the internal feedrate value used by the
PID controller. The purpose of this factor is to achieve a smooth and readable feedrate value.
Setpoint Dampening
The speed-dampening factor controls a sliding average filter that affects the internal and
displayed setpoint. Use this filter to eliminate noise on a remote analog setpoint (4..20 mA input).
Backlight Off Time
The backlight off time is used to turn off the backlight after a period of when no key press is
detected. A value of 0 will turn off this feature.
NOTE: This feature requires the proper hardware upgrade to the controller. LTI and LCD boards
must be of the appropriate type for this feature to work.
Graph Time
This parameter is the update time of the Graph Main Screen. With the default of 1 second per
sample the controller can display approximately 2 ½ minutes of data. By changing the sample
rate to 5 seconds, the controller can display approximately 12.5 minutes of data with a decrease
of resolution.
EMT Parameters
Weight Per Pulse
This is the value used to scale the EMT (External Mechanical Totalizer) output. If the Weight per
Pulse is set to 1 then there is a pulse for every pound or kilogram that is totalized. If Weight per
Pulse Value is set to 100.0, there must be 100.0 pounds or kilograms totalized before a pulse is
sent to the external totalizer. Limits are minimum 1.0 and a maximum of 100,000.0.
Pulse Length
This value is the length in seconds for the pulse that is sent to the EMT. A mechanical totalizer
will require a longer pulse than a electronic totalizer or pulses may be missed. The pulse output
from the controller is buffered, in order to allow slow EMT’s to “catch up” and be accurate. The
recommended value for a mechanical totalizer is 0.10, and 0.01 for an electronic totalizer. Limits
are minimum of 0.01 and a maximum of 5.0. The duty cycle is 50% at the full pulse rate.