revision: 1
FlexxPump 250/400 DLS
User Manual
28
EN-
Description:
The FlexxPump 250/400 DLS is properly connected to an external controller via the
electrical interface and connected to the power supply.
The FlexxPump 250/400 DLS sends a permanent output signal (high level) to PIN 4,
which indicates to the external control (PLC) that it is ready for operation. This output
signal must be permanently and continuously present for >3 seconds. Control by the
external controller is only possible if this condition is present.
The control signal 2 seconds with a signal length of 2 (1.9 ... 2.1) seconds high level
can be sent from the external control (PLC) to the FlexxPump 250/400 DLS.
Immediately after the control signal drops, the motor run (ML) of the
FlexxPump 250/400 DLS starts and 0.15 cm³ lubricant is conveyed to the outlet.
Simultaneously with the start of the motor run (ML), the FlexxPump 250/400 DLS sends
a low level output signal to the external controller (PLC) as confirmation for the duration
of the motor run (ML).
The motor running time (ML) depends on various conditions, including the
counterpressure present or built up in the hydraulic system and the temperature. With
the FlexxPump 250/400 DLS, the motor running time (ML) is 7...17 seconds.
At the end of an error-free and successful motor run (ML), the output signal at
FlexxPump 250/400 DLS changes from a low level to a high level.
A possible next control signal can be sent from the external controller (PLC) at the
earliest >3 seconds after the end of the error-free and successful motor run. In the
meantime, the FlexxPump 250/400 DLS does not process any control signals.
In order to ensure a reliable and unambiguous recognition of the control
signal, a pause must be observed. For the control signal 2 seconds, the
FlexxPump 250/400 DLS requires a pause time (Tp) of at least 22 seconds between
two identical or different control signals.
If the integrated microelectronics of the FlexxPump 250/400 DLS has detected an
error during or immediately after the end of the motor run (ML), this is transmitted to the
external controller (PLC) by the corresponding output signal (section 8.3).
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