Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 95)

Formatting and Interpreting Data Blocks
Chapter 7
7Ć13
Bit 16 Diagnostic Valid
When you turn on the select diagnostic bit of axis control word 2 of the
command block, this bit goes on to indicate that the position (or following
error) words in the status block contain diagnostic information.
Bit 17 Command Taken
When you turn on the new-parameter, moveset override, offset preset, or
get-new-preset-value bit in the command block, this bit goes on to
indicate that the command has been taken. When you detect this bit to be
on, you can turn off the command-block bit.
Position/FollowingĆError/Diagnostic Words
The 3rd and 4th status words for an axis provide either current axis
position, following error, or diagnostic information. You can select which
status to display by controlling the state of bits 11 and 15 of the axis
control word 2 of the command block (refer to Figure 7.44 and its
associated text for more information on Axis Control Word 2).
Turn off bits 11 and 15 to display the current axis position as shown in
Figure 7.6. The maximum value is 999.9999 inch or 19999.999 mm. If
the axis exceeds the maximum, it displays the maximum, and the
position-valid bit goes off.