Functions of the Compact Terminal and the Ejectors
EN-US · 30.30.01.01598 · 02 · 01/18
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Measure Evacuation Time t0 and t1 (0x0094 and 0x0095)
Diagram of function for monitoring evacuation time t0 and t1
Vacuum
[mbar]
Suction ON
Time [s]
The evacuation time t0 is defined as the time (in ms) from the start of a suction cycle, which is started by
the “Suction ON” command, until switching threshold H2 is reached.
The evacuation time t1 is defined as the time (in ms) from when switching threshold H2 is reached until
switching threshold H1 is reached.
Measure Air Consumption (0x009C)
The actual air consumption of a suction cycle is calculated taking the system pressure and nozzle size into
account.
The process data can be used to notified the ejector of the actual system pressure. If this is not available,
the system operates with the optimum system pressure.
Measure Leakage (0x00A0)
This function measures the leakage (represented as the vacuum drop per time unit in mbar/s) after the air
saving function interrupts the suction because switching point H1 was reached.
Measure Dynamic Pressure (0x00A1)
This measures the system vacuum achieved during unobstructed suction (free flow vacuum). The duration
of the measurement is approx. 1 second. Therefore, to evaluate a valid dynamic pressure, uninterrupted
suction is required for at least 1 second after starting the suction, i.e. the suction point must not be cov-
ered by a part.
Measured values below 5 mbar or above the switching point H1 are not regarded as valid dynamic pres-
sure measurements and are rejected. The result of the last valid measurement is retained.
Measured values above the switching point (H2 - h2) but simultaneously lower than switching point H1
result in a condition monitoring event.
Vacuum Value of the Ejectors (0x0203)
This parameter is used to display the current vacuum in the individual ejectors.
Maximum Vacuum Reached (0x00A4)
In each suction cycle, the maximum system vacuum level reached is determined and made available as a
parameter.
