Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 114)

Formatting and Interpreting Data Blocks
Chapter 7
7Ć32
Feedrate Reduction
When axis following error reaches 106.25% of rapid traverse following
error, the servo positioning assembly automatically reduces feedrate by
50% of the feedrate value. This feedrate reduction provides an
opportunity for following error to decrease. Feedrate returns to the
programmed value when following error is reduced to less than or equal
to 106.25% of rapid traverse following error and the current move is
completed.
Note that if the excess following error value you enter is less than or equal
to 6%, the axis executes immediate stop before following error reaches
106.25% of rapid traverse following error.
+ and Ć D/A Voltage
Bits 00 thru 13 in words 15 and 16 (34 and 35, 53 and 54) specify the
maximum servo output voltage that is available to command rapid
traverse feedrate in the positive and negative directions (Figure 7.21).
Enter values for these parameters in BCD format in the range of 0.01V to
9.99V. Programming 0 causes the D/A voltage value to default to 10V.
Initially set them to the maximum value the servo drive will accept. The
plus and minus D/A voltage values needn’t be equal. You can enter them
as different values to compensate for directional differences in drive
performance during axis integration (chapter 9).
Home Position Value
Words 17 and 18 (36 and 37, 55 and 56) specify the axis home position
value (Figure 7.22). Bits 0 through 14 of the first word contain the most
significant digits. Bit 17 of the first word specifies the sign of the home
position value. When the servo positioning assembly performs a search
home or initialize home operation, it sets the axis position register to the
value you enter for this parameter.