bürkert 8626 Bedienungsanleitung Seite 38

Bus connection
Types 8626, 8006, 8716, 8706, 8712, 8702, 8711, 8701, 8710 and 8700 are
available as bus versions. Setpoint and process value are received or repeated in
digital form via the bus. One can choose between a PROFIBUS DP and a
DeviceNet connection (see also Supplement to Operating Instructions for fieldbus
devices or serial communication RS 232 / RS 485 ).
LEDs to indicate the operating mode (deault configuration)
POWER LED
COMMUNICATION LED lights
LIMIT (y) LED
ERROR LED
Binary inputs (default configuration)
In order to initiate the event in each case, the binary input must be connected for
at least 0.5 s to DGND.
Functions
Binary input 1
Binary input 2
Binary input 3
38 - MFC/MFM
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lights The device is supplied with operating
voltage
flashes Autotune function activated
(green)
The device communicates via bus or RS-
interface.
(yellow)
lights With MFC:
indicates that the correcting variable of the
valve has almost reached 100 %. In
practice, this usually means that the
pressure at the controller is insufficient to
realize the desired flow rate.
With MFM:
indicates that the process value has almost
reached the nominal flow rate.
flashes The device is in an operating mode other
(blue) than control or Autotune.
lights Not a serious error, e.g. Autone not
completed successfully or faulty LED.
flashes Serious error, e.g. sensor breakage or faulty
(red) internal voltage supply.
Autotune function (not configured with MFM)
not configured
(not present with 8713 / 8703)
(with second gas calibration - change gas)
not configured
(not present with 8710 / 8700 / 8711 / 8701 / 8713 / 8703)