CONTREX CX-1200 - Manual (Page 14)

Page 12
Step 3 - Master Mode and Feedforward Scaling - Parameter Entry
The CX-1200 will display System Setup Master Mode\Page 3.
Configure the CP’s on this screen as required.
State {MP-50}
RUN Mode {CP-202}
Master SPx {CP-201}
Pulses FI2 {CP-267}
EU FI2 {CP-268}
Kff Auto En {CP-364}
Kff {MP-48}
FI2 Hz {MP-03}
FI2 RPM {MP-04}
Fb EU/Tm {MP-06}
NOTE: The Help key accesses the Help screen and gives you a brief description of the parameter or
subject that is highlighted (active) on the screen. Press the Help key again to return to the previous screen.
WARNING
Prepare the machine for motion.
Alert everyone present.
In this section, the master mode is scaled for engineering units. The feedforward is also scaled using the auto
feedforward feature. Master mode scaling should be completed even if your end application is not master mode.
The CX 1200 must convert the feedback 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, the first part
is FI2 Pulses and the second part is EU FI2 (Engineering Units for Frequency Input Number Two). For
example, if feedback is coming from a one foot circumference metering wheel driving a 1000 line encoder and
engineering units will be inches, then EU FI2 {CP-268} = 12.0 and FI2 Pulses {CP-267} = 1000.
1. Enter RUN Mode {CP-202} = Master.
2. Enter your FI2 Pulses {CP-267}.
3. Enter your EU FI2 {CP-268}.
Enter the desired master mode setpoint in engineering units:
4. Enter Master SPx {CP-201} = Desired speed.
Verify master mode scaling:
5. Place the CX-1200 control into “Run”.
6. If the Fb EU/Tm {MP-06} is not what you expect to see with the Master SP, then recalculate your scaling terms
and return to step 2.
Scale the feedforward:
7. Enter Kff Auto En {CP-364} = ON.
8. Wait several seconds.
9. Enter Kff Auto En {CP-364} = OFF.
10. Place the control into “F-Stop”.
Press the "Page Down" key to proceed to the next step.