Cattron CANplus CP800, Руководство по эксплуатации

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CANplus
TM
CP800
Control Panel Operation Manual
27
9M02-1000-A201-EN
Revision E
Faults
Transducer Level Low-Level Switch High-Level Switch Result
Above Low-Level Point Open — Transducer is within normal
operating range but value is incorrect
(too high) because low-level float
should be closed
Below High-Level Point — Closed Transducer is within normal
operating range but value is incorrect
(too low) because high-level float is
closed
Out of Range (Low) — — Transducer value is below the
normal operating range (severe)
Out of Range (High) — —
Transducer value is above the
normal operating range (severe)
7.4.3 Configuring the Transducer
With a transducer connected, the CP800 can be configured to throttle the engine so as to maintain a specific
transducer level much like a car’s cruise control. If this cruise control feature is desired, the Maintain Transducer
Level should be set to Enabled. The other choice is Disabled, which follows the Ramp Profile described in the
Ramp Profile section.
The transducer’s cruise control function can be independently set to either Low to High or High to Low.
Function Throttles Up When Throttle Down When
Low to High Input is below the target point Input is above the target point
High to Low Input is above the target point Input is below the target point
To see or change the transducer target point, go to the
Autostart → Maintain Transducer Level → Target Point
menu.
Some applications are slow to respond to throttle changes while others are fast. An analogy is a car’s cruise
control and how the car reacts going downhill or uphill. Going downhill, a car will quickly speed up when just a
little more throttle is applied. In this case, the throttle adjustment should be less aggressive. On the other hand, a
car going uphill will speed up slowly and therefore needs more aggressive throttling. To adjust how quickly the
control panel ramps the throttle up or down for a particular application, go to the
Autostart → Behavior →
Maintain Transducer Level → Throttle Aggressiveness
menu. The higher the number, the more aggressive or
quicker the control panel ramps the throttle up or down to maintain the level.
When adjusting the Throttle Aggressiveness, it is best to understand how responsive the system is to changes.
Similar to the analogy of the car going downhill, a small water tank with a large pump is an example of a system
that will respond quickly to changes when throttling the water level. Alternatively, a large tank with a small pump
will respond more slowly.
The following figure demonstrates the responsiveness of a system to adjustments in Throttle Aggressiveness. A
fast-responding system will need a lower aggressiveness value. Otherwise, the engine RPMs will overshoot and
undershoot the target value as depicted in the graph by the red “Too High” throttle aggressiveness line. Ideally,
the engine’s RPM should quickly ramp up and home in on a small RPM range to maintain the target value as