Rockwell Automation 1771-QDC, D17716.5.85(Passport) MNL. PLASTIC MOLDING MODULE - Manual (Page 42)

Configure the QDC Module's I/O
Chapter 3
3-11
Determine Values for the Ram (Screw) Position Sensor
ATTENTION: Incorrect values entered in DYC09 through
DYC12 may result in rapid ram (screw) motion and potential
damage to your barrel or seals of your injection cylinder.
To complete the configuration for your ram (screw) position sensor, do the
following and enter the results on Worksheet 4-E:
Important: If your position sensor has zero and span potentiometers for
setting the zero reference and linear resolution, do so during this
procedure.
1. Move the ram (screw) forward until it reaches its mechanical stop at
the nozzle end. This is the zero position.
2. Remove ram (screw) pressure and/or flow to stop movement.
3. Record this position value (normally 0000) on line 1 for MCC09 on
Worksheet 4-E.
4. With your programming terminal, read the signal level returned in
SYS33 (N40:185) from your position sensor. You may wish to zero
your position sensor at this time.
5. Record this value on line 3 for MCC11 (should be at minimum signal
if you zeroed your position sensor in step 4).
6. Move the ram (screw) backward to the backpoint mechanical stop.
7. Remove ram (screw) pressure and/or flow to stop movement.
8. Measure the distance travelled.
9. Record this distance on line 2 for MCC10.
10. With your programming terminal, read the signal level returned in
SYS33 (N40:185) from your position sensor. You may wish to span
your position sensor at this time.
11. Record this value on line 4 for MCC12.
You may now download your adjusted values to the QDC module using
the MCC download procedure presented earlier in this chapter.