Software Communication 3-37
V <n> SET TOP VELOCITY
The [V] command sets the peak speed in Hz (half-steps/second). The syntax for this
command is:
[V<n>], where <n> = 5..5800 Hz (1400 is the default)
NOTE Syringes 2.5 mL and larger may require slower speeds. Users must determine
the appropriate speeds for their applications.
S <n> SET SPEED
The [S] command sets a predefined top plunger speed. As <n> increases, the plunger
speed decreases. The syntax for this command is:
[S<n>], where <n> = 1..40 (11 is the default)
These speeds do not cover the full range of speeds the plunger can travel. They are
commonly used velocities provided for the convenience of the user. All times are
approximate and will vary with different ramp speeds and cutoffs. Cavro also provides a
utility for performing theoretical speed calculations in Pump:Link Evaluation Software
(in the Utility menu on the user interface). For information on determining timing for
specific applications, see Appendix B, "Plunger Information.”
The [S] command sets top velocity without changing start velocity, slope, and cutoff
velocity, except:
• If the start velocity is higher than the (new) top velocity, start velocity is set = top
velocity.
• If the cutoff velocity is higher than the (new) top velocity, cutoff velocity is set =
top velocity.
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