Ppo Motor Calibration; Overview; Calibration Status Information - Honeywell 900 User Manual

I/O Calibration

PPO Motor Calibration

PPO Motor Calibration

Overview

This lets you calibrate a PPO motor three ways:
• Auto – Controller positions the motor and captures the positions. See page 168.
•
Semi-Auto – Controller positions the motor and the user captures the positions. See page 169.
• Hand – User positions the motor by hand and captures the positions. See page 170.
The calibration of a motor is similar to that of an AI or AO. However, the motor calibration values are
stored as part of the PPO block's configuration data, not on the AI card itself. Therefore, to retain these
motor calibration values, you must upload the configuration and save it to disk after motor calibration has
been performed.
The basic motor calibration procedure is as follows:
•
move the motor to its 0% position and wait until the feedback signal has stabilized.
•
capture the 0% feedback value.
•
move the motor to its 100% position and wait until the feedback signal has stabilized.
•
capture the 100% feedback value.
• measure the true motor speed by:
d) moving the motor for a fixed period of time.
e) measuring the position feedback delta.
f) computing a motor speed from this data.
This value will override any previously configured value.
•
save the calibration values as part of the PPO block's configuration data.
After calibration, return the Controller to Run mode. Use IO Calibration display (page 159) or Controller
Mode button (page 10).

Calibration Status Information

Instrument Status and Instructions – this field indicates the current status of the calibration procedure.
NOTE: If a status of "Calibration Failed" is displayed, take the appropriate corrective action,
and then repeat the calibration procedure again, beginning at Step 1. See "Calibration Errors"
for more information.
Time required for current step is shown in % complete. Once this becomes 100% then only
Controller will allow to proceed.
Feedback Value– this field shows the motor feedback value [a value between 0.0 and 1.0]. This value
should change whenever the motor is actually moving.
Calibration Block– Select the PPO to be calibrated.
166 900 Control Station User Guide Revision 9
May 2014