Type 8691

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1.6. Functional overview Type 8691

Function

Version

24 V

IO-Link

AS-

Interface

Stand-

ard-Slave

AS-

Interface

A/B-Slave

büS/

CANopen

Basic functions

Teach function position sensor

X

X

X

X

X

Manual override of pilot valve (mechanical)

X

X

X

X

X

Manual override of pilot valve (electrical)

–

X

–

–

X

Position feedback process valve

X

X

X

X

X

Feedback signal current valve position (intermediate position)

–

X

–

–

–

Optical position feedback/status display high-performance LEDs

X

X

X

X

X

Colour change of the optical position feedback possible

(LED in 3 colours: green, yellow, red)

X

X

X

X

X

Selection of LED display modes

–

X

–

–

X

Diagnostic LEDs

–

X

X

X

X

Selection of different LED display modes

–

X

–

–

X

Date storage function

–

X

–

–

–

Locating function

–

X

–

–

X

büS communication interface (Bürkert system bus)

–

–

–

–

X

büS service interface (for Bürkert Communicator software)

–

X

–

–

X

Diagnosis

Process valve switching cycles counter with definable limit value

–

X

–

–

X

Pilot valve switching cycles counter

–

X

–

–

X

Operating hours counter with definable limit value

–

X

–

–

X

Process valve counter for opening/closing timeout

–

X

–

–

X

Travel accumulator with definable limit value

–

X

–

–

X

Active diagnostic messages (feedback when limit values are

exceeded)

–

X

–

–

X

Diagnosis reset command (to reset counter values)

–

X

–

–

X

Error feedback displacement transducer

–

X

X

X

X

Self-monitoring control head with automatic error message

–

X

X

Feedback Teach error

X

X

X

X

X

Feedback overtemperature

–

X

X

Feedback communication error

–

X

X

X

X

Feedback for opening/closing timeout

–

X

–

–

X

Tolerance for switching time overrun

–

X

–

–

X

Error detection if the setpoint position is not reached

(end positions not reached)

–

X

–

–

X

Tolerance band of end position detection

–

X

–

–

–

Detection of under-voltage and over-voltage of power supply

–

X

–

–

X

Log function for error cases

–

X

–

–

X

Parameterization

Enable/disable safety position in case of setpoint or bus error

–

X

–

–

X

Selecting and setting the SIO mode

–

X

–

–

–

Selection of digital outputs (end positions) PNP, NPN

X

X

–

–

–

Selection of digital outputs (end positions) PNP, NPN, PP

–

X

–

–

–

Deactivation of local operation (lock function)

–

X

–

–

X

Factory reset function (reset to factory setting)

–

X

–

–

X