Rockwell Automation 1794-ID2 U.MNL INCREMENTAL ENCODER - Manual (Page 76)

7–2 Calibrating Your Incremental Encoder Module
Publication1794ĆUM015B-EN-P - May 2001
Calibration Method 1
Calibration is enabled by the flag CalEnable, which is enabled by the
control system. The preset value is copied to the counter register at a
positive edge on input Z. The old counter register value is saved in
the store register for evalution.
Calibration direction is determined by CalDirection (0 = positive
direction, 1 = negative direction).
Reset Calibrated, Stored and PresetReached after calibration with
CalReset, StoreReset and PresetReset.
Counter Register
Latched Register
Counter Register
Logic
Z =
Preset Register
PresetReached = 1
Stored = 1
CalEnable = 1
CalDirection = Direction
of the latest count pulse
Calibrated = 0
StoreControl = 0
Stored = 0
Calibrated = 1
Logic
Z =