CONTREX M-Traverse - Manual (Page 105)

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PERFORMANCE MONITORING
Performance Monitor Variables monitor the performance of the M–Traverse and your
system. Figure 3-2 is a block diagram of the internal control structure of the M–
Traverse and the Performance Monitor Variables.
Lead
Frequency
(MV-41)
Feedback
Frequency
(MV-42)
Accel/Decel
Length
(CP-09)
Lead PPR
Reel
(CP-16)
Profile
Generator
E.U.
Calculation
Follower E.U.
(MV-45)
Position
Error
(MV-49)
Trim
Output
(MV-48)
DAC
Output
(MV-47)
Feed Forward
Calculation
PI Compensation
Routine
+
+ +
+
+
–
Lead
Position
(MV-43)
Follower
Position
(MP-44)
Foll. Lines
Reel
(CP-17)
Traverse
Length
(CP-02) Dwell
(CP-10)
Setpoint
(CP-01)
E.U.
(CP-15)
RPM
Calculation
Tach
(MV-40)
Figure 3-2 M–Traverse Internal Structure
MV-40 TACH (FEEDBACK VELOCITY)
Tach is the feedback (Follower) displayed in RPMs. The feedback is read by the M–
Traverse every 250 microseconds. The readings are summed, averaged and then
displayed every 250 milliseconds.
MV-43 LEAD POSITION
The Lead Position displays the distance of the Lead relative to the beginning of the
profile. This value is displayed in encoder lines.