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3 - Software Communication
Operating Commands
Figure 3-2
3 - 28
the direction in which the valve homes during initialization (clockwise or
counterclockwise)
the direction in which the ports are numbered, starting with the syringe port
(clockwise or counterclockwise)
After initialization, the direction in which the valve moves is specific to the valve
type and command.
With non-distribution valves, the I, O, B, or E command specifies the
combination of valve ports to be connected. The valve moves following the
shortest path available.
For example, in Figure 3-2, if the 3-port non-distribution valve has been initialized
with the [Z] command, the ports will be numbered as shown in the top diagram
(clockwise). Issuing an [O] command aligns the syringe port with port 2, as shown.
Valve Position Examples for 3-Port Non-Distribution Valves
With distribution valves, the direction in which the valve moves is determined by
the valve command. It will not necessarily follow the shortest path.
The [I] command moves the valve in a clockwise direction.
The [O] command moves the valve in a counterclockwise direction.
Note: Use of [I] and [O] in distribution valves is by convention, and does not
pertain to input or output characteristics.
Cavro® XLP 6000 Modular Syringe Pump Operating Manual, 734237-C, en
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