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Description:
LUB-D is properly connected to an external controller via the electrical interface and
connected to the power supply.
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LUB-D 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 perma-
nently and continuously present for >3 seconds to control LUB-D by a PLC.
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The control signal 8 seconds with a signal length of 8 (7.9 ... 8.1) seconds high level
can be sent to LUB-D from the external control (PLC).
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Immediately after the control signal drops the motor run (ML) of LUB-D starts and 0.16
cm³ lubricant is conveyed to the outlet. Simultaneously, LUB-D sends a low level output
signal to the external controller (PLC) to confirm the duration of the motor run (ML).
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The motor running time (ML) depends on various conditions, including the present or
built up counterpressure in the hydraulic system and the temperature. The motor running
time (ML) is 2x 7...17 seconds.
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At the end of an error-free and successful motor run (ML) the output signal at LUB-D
changes from a low level to a high level.
A new control signal can be sent from the external controller (PLC) at the earliest of >3
seconds after the motor run ended error-free and successfully. In the meantime, LUB-D
does not process any control signals.
In order to ensure a reliable and unambiguous recognition of the control signal a
pause must be observed. The control signal 8 seconds requires a pause time (Tp) of at
least 45 seconds between two identical or different control signals.
If the integrated microelectronics of LUB-D have detected an error during or immedi-
ately after the motor run (ML), this is transmitted to the external controller (PLC) by the
corresponding output signal (chap. 8.3).
Summary of Contents for Lubricus LUB-D Series
Page 1: ...User manual LUB D...
