MC³ 24.96.EX O&M Manual
Page 29
08/14/01 4:34 PM/LDD
Belt Load
Load Limit
(Instant)
Absolute
Limit
Zero
Load
Wait Time
Test Revolution
Increment
Limit
Wait Time
Wait Time
Test
Discarded
Test Revolution
Value above
Increment Limit,
no change
Wait Time
The “Time Delay” value is the time that the controller will wait after all conditions have been met
before actually starting a Zero Tracking procedure. This means that the belt must be empty and
running for this amount of time before the process will begin. In addition, this delay time is required
to elapse before another procedure will begin after completion of a previous. Limits are minimum
of 0 and maximum of 3600.
Max Load
This value is used to determine whether or not the belt is empty. For example, if this value is 2.00
lb/ft, then the belt would be considered empty if the load on the scale drops below this value. If this
value is exceeded anytime during the wait test than the current Zero Track test is abandoned and
the wait time is started for a new test. Limits are minimum of 0 and maximum equal to the Design
Load.
Max Step Alwd
This parameter is the maximum allowable Zero Tracking step change. If the new calculated Zero
Load differs from the old more than this parameter then no change is made. Limits are minimum
of 0 and maximum of 20% of the Design Load.
Max Z Track
The “Maximum Zero Tracking” parameter is the maximum zero tracking compensation that will be
used. If this value is reached, with a legal step change, no change is made and the General Alarm
Bad Zero Tracking
will occur. Limits are minimum of 0 and maximum of 10% of the Design Load.
Tachometer Parameters
This set of parameters allows you to set up the Tachometer interface. To select the type
and direction of the tachometer, press the appropriate button and cycle through the
possible choices. To edit the numeric parameters, use the directions found in Numeric
Entry Screen on page 9.
Type
The following are the four types of tachometers that can be used with the MC³:
Optical
5 Volt digital encoder, either signal channel or quadrature.
Mag/F-25
Merrick F-25 Encoder or a 2 wire current loop magnetic style encoder.
