Simulator - MERRICK Genetix Safety, Installation, Operation And Maintenance Manual

proximity switch and target) then this can be connected to the second tacho
port and used to detect belt slippage or breakage.
Note: In conjunction with this setting, the parameter corresponding to how much
belt travel to allow without a pulse from the second tacho must be set (see Main
Menu > Advanced Setup > Tachos > Numeric Data > Zero Spd Distance).
Second (Pri) First (ZSpd)
This setting is the same as the one above except the roles of the two tachos
are reversed.
Analog Input
Speed information is generated by an analog input. Note that the speed value
must be calibrated using an analog input calibration procedure. Negative speed
values on the analog input are not allowed and are replaced with zero.
This setting is most commonly used when there is no real tacho available, but
there is an analog signal available that represents belt speed. This might be
from an output on the drive or a tach-generator on the motor.
From Network
Speed information is written to the GCM by means of communications. Note
that the speed value must be written as a floating point number in engineering
units. Negative speed values are not allowed and are replaced with zero.
This setting is most commonly used when there is no real tacho available, but
there is a signal available from the Network that represents belt speed.

Simulator

Speed information is derived from the feedrate PID controller's Belt Speed
Demand signal. This makes it possible to run PID control of a feeder with no
tachos, usually for testing or diagnostic purposes. A parameter called "Speed
Factor" is used to adjust for the relation between Belt Speed Demand and belt
speed (see Main Menu > Advanced Setup > Tachos > Numeric Data > Speed
Factor).
Calculation:
Belt Spd = (Belt Spd Demand x Design Speed) / Speed Factor
None
If no tachos are connected and the belt speed can be assumed to be constant
this setting can be used. There is a Logical Input available called "Belt is
Running" that can be used to turn belt speed on and off. Typically this would be
mapped to a Physical input and connected to a motor starter that drives the
belt.
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