DLS FlexxPump 250 OLED, Руководство пользователя

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User manual 250/400 OLED
Rev.: SG-20220516
Page 61 of 79
FlexxPump 250 / 400 OLED
User manual
Description:

The FP 250/400 OLED is properly connected to an external controller via the electrical interface and
connected to the power supply.

Pulse control mode is activated on the FP 250/400 OLED.

There are no errors on the FP 250/400 OLED; the FP 250/400 OLED is ready for operation.

The FP 250/400 OLED sends a permanent output signal (high level) to PIN 4, which indicates
readiness for operation to the external controller (PLC). This output signal must be present permanently
and uninterruptedly for >500 milliseconds. Only if this prerequisite is fulfilled, an activation by the external
control is possible at all.

The control signal „1 lubrication stroke“ with signal length of 100 (75 ... 125) milliseconds high level can
be sent from the external control (PLC) to the FP 250/400 OLED.

While a high level is present at PIN 2 of the FP 250/400 OLED as an input signal from the external
controller (PLC), the symbol indicating the pulse control operating mode flashes in the display for the
length of the signal.

Immediately after the control signal drops, the lubrication stroke C of the FP 250/400 OLED starts and
0.15 cm³ of lubricant is delivered to the outlet. The FP 250/400 OLED monitors this lubrication stroke for
the entire duration.

The lubrication stroke time depends on various conditions, including the counterpressure present or
built up in the hydraulic system and the temperature. For the FP 250/400 OLED, the lubrication stroke
duration is 7...17 seconds (t
C
= 7...17 seconds).

During the lubrication stroke C, a numerical value 1...70 is shown in the display, which indicates the
approximate back pressure in bar. The back pressure is displayed in relation to the outlet.

At the end of a lubrication stroke C, the FP 250/400 OLED sends an output signal to PIN 4, which
provides information about the past lubrication stroke as well as other states of the FP 250/400 OLED
for evaluation at a PLC or other external controller (see chapter 8.3).

At the earliest >500 milliseconds after the end of the response signal, a possible next control signal
can be sent from the external control (PLC). For the characteristics and interpretation of the output
signal, refer to Chap. 8.3. In the meantime, the FP 250/400 OLED does not process any control signals.

If the integrated microelectronic of the FP 250/400 OLED has detected an error during or immediately
after the end of the lubrication stroke, it will be transmitted to the external control (PLC) by the corresponding
output signal (chap. 8.3).