CONTREX CX-1010 - Manual (Page 11)

Page 11
Follower Mode Scaling
In this section, the follower mode is scaled for engineering units. Master mode
scaling should be completed before proceeding with the follower mode scaling
procedure.
If it is in follower mode, the CX-1010 must convert the lead frequency into
engineering units (RPM, Feet/min, etc.). To do this, it must "know" the ratio
between encoder lines and these units. This ratio is entered in two parts on page
one of the STANDARD SIGNALS screen. The first part is FI1 Pulses and the
second part is EU FI1 (Engineering Units for Frequency Input Number One). For
example, if the lead is coming from 60 tooth Quad Ring Kit on a motor armature
driving a conveyor with a 2 foot diameter roll through a 30:1 reduction and
engineering units are feet, then:
1. Go to MAIN MENU\SETPOINTS\RUN MODES\.
Enter Setpoint Mode {CP 102} = Fol.
2. Go to MAIN MENU\SCALING\STANDARD SIGNALS\P1\.
Enter FI1 Pulses {CP 162} = 1800. (60*30)
3. Enter EU FI1 {CP 163} = 6.283. (2*3.14...)
Set the Tach display for ratio:
4. Go to MAIN MENU\SCALING\MONITOR PARAMETERS\P1\.
Enter ScFb Eq {CP 190} = Fol.
5. Enter ScFb EU {CP 191} = 1.000.
6. Go to MAIN MENU\DEVICE CONFIGURE\STATUS SCREEN SETUP\.
Enter Lg Number Units {CP 199} = 48. (Ratio)
In follower setpoint mode, the setpoint expresses the ratio between the follower and
lead engineering units. For example if the lead is in centimeters, the follower is in
milliliters and the setpoint is 1.25, then the follower will produce 1.25 ml per cm.
Enter the follower setpoint as the ratio of follower to lead engineering units:
7. Go to STATUS\.
Enter Follower SPx = 1.000.
Verify the Follower Mode Scaling:
WARNING
Prepare the machine for motion.
Alert everyone present
8. Place the CX-1010 control into “Run”.
9. If the motor speed does not agree with Follower SPx, then recalculate your
scaling terms and return to step 2.
10. Place the CX-1010 control into “F-Stop”.
Procedure complete