Burkert Type 8712 - Manual (Page 33)

33
Operationandfunction
Type 8626, 8712
function Description
Actuate Autotune Start of Autotune function for optimization of
the control settings to the conditions available
in the system (see section „8.3“).
Switch to
specification 2 The calibration curve saved under Gas 2 as
well as all settings entered there are used.
Totalizer Reset The integrated totalizer (quantity integrator)
is reset.
Start set-point
value profile Start of the saved set-point value profile
(see section „8.3“).
Control mode Enables the solenoid valve to be opened at a
given value (see section „8.3“).
Correct safety
value* The safety value stored in the device is used
as a flow-rate set-point value.
In this case, the flow-rate set-point value
received by the analogue input or field bus
is ignored.
Close the valve
completely* Valve completely closed.
In this case, the flow-rate set-point value
is ignored.
Open the valve
completely* Valve completely opened.
In this case, the flow-rate set-point value
is ignored.
Tab. 2 : Possible binary input functions.
* The operating principle of the binary input (active / inactive) can
be selected for these functions
8.2.3. relay output signals
MFMs / MFCs are equipped with 2 relay outputs to indicate the
operating state, limit values outside the maximum / minimum or a fault.
output Assignment
Relay output 1 y2 Limit
Relay output 2 Fault (in case of a major fault, such as
defective sensor or defective internal voltage)
Tab. 3 : Relay output default assignment
function Description
Not used No function is assigned to the relay output
Power ON The device is energized.
Autotune activated The Autotune function is in progress.
Gas 1 or 2 active
Calibration curve 1 or 2 is used.
User-defined
calibration active The device operates at the calibration
adjusted by customer.
Binary input
1 or 2 active Binary input 1 or 2 has been activated.
Activate relay
output by field bus The status of the relay outputs is specified via
the field bus or the serial interface.
Correct safety
value active The safety value is used as the set-point
value.
Set-point value
profile active The set-point value profile stored in the device
is used as the set-point value.
Control mode
active The control mode is active, i.e. the solenoid
valve is opened at a given value.
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