User manual 250/400 OLED
Rev.: SG-20220516
Page 66 of 79
FlexxPump 250 / 400 OLED
User manual
8.2.5. Control/input signal „Acknowledge error“
The „Acknowledge error“ control signal is used to acknowledge the E2 overpressure or E3 over/
undervoltage errors after they have occurred previously and have been communicated by the
FP 250/400 OLED to the PLC. It is the only control signal that the FP 250/400 OLED can process if an
error message was sent in response to the previous motor run. Regardless of the principle possibility
of remote acknowledgement of an error, it is essential to identify and eliminate the cause when an error
message is present.
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 is an E2 or E3 error at FP 250/400 OLED.
The output signal sent from the FP 250/400 OLED to PIN 4 to the external controller reports an error
message E2 or E3 back.
An identification of the cause of the error message has taken place on the FP 250/400 OLED and it
has been eliminated.
The control signal „Acknowledge error“ with signal length of 1700 (1675 ... 1725) milliseconds high
level can be sent from the external control (PLC) to the FP 250/400 OLED.
After the end of the control signal, the integrated microelectronic checks the FP 250/400 OLED
independently:
If this internal check is
successful
, the error E2 or E3 is thus acknowledged
and the
FP 250/400 OLED is ready for operation again.
If this internal check is
not successful
, the FP 250/400 OLED continues to send an output
signal that defines an error. The error is still present. In this case, check the lubrication point and the
FP 250/400 OLED again and then send the „Acknowledge error“ control signal again. If the second
check is again unsuccessful, disassemble the FP 250/400 OLED with the lubricant cartridge screwed
on and return the complete lubrication system to the manufacturer with a detailed description of the
error.
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.
