Art. No. DS 4092 TS
Figure 23: Example of the function "Value transmitter 0…100 %" without value adjustment
("Value transmitter 0…255" is basically the same).
Function value adjustment enabled:
If the value adjustment was enabled in the ETS, the rotary knob must be turned by a defined
number of notches during an operation so that a value adjustment is executed. The parameter
"rotation angle for value adjustment" defines the number of notches required for the value
adjustment.
During an operation of the rotary knob - as with the value transmitter without value adjustment -
a 1-byte value telegram is first transmitted after the first notch (minimum rotation angle)
regardless of the direction it is turned. The parameter "Starting value in case of value
adjustment" defines what value this is (see below). If the number of notches necessary for the
value adjustment is exceeded during continuous operation, the device adjusts the value by the
preset step width depending on the rotation direction and transmits this to the bus. If the
operation still continues, the value is adjusted continuously.
i
The transmission of a telegram can be acknowledged during a value adjustment the
internal buzzer of the device. For this purpose, the buzzer must be configured to the
signalling function "Telegram acknowledgement" (see page 88).
i
If the direction of rotation changes without interruption during an operation, the rotary knob
does not transmit any further telegram. The device evaluates this operation as a wrong
operation.
i
The speed of rotation is not evaluated by the device in the function with value adjustment.
During a new operation, a telegram is already transmitted to the bus after the first notch
(minimum rotation angle).
In a value adjustment, the device distinguishes between the following options...
-
The "Starting value in case of value adjustment" parameter defines the original starting
value for the adjustment. Adjustment can begin from the value configured in the ETS, from
the final value of the last adjustment cycle or from the current value of the communication
object.
-
The parameter "Direction of value adjustment" defines whether the values, should be
increased ("upwards") or reduced ("downwards") depending on the direction of rotation.
-
The parameter "step width" defines the change of the value during adjustment in a positive
or negative direction.
-
If, during the value adjustment, the device detects that the preset step width will exceed the
limits with the next telegram, the device adapts the step width once in such a way that the
corresponding limit value is transmitted together with the last telegram. Depending on the
setting of the parameter "Value adjustment with overflow ?" the device stops the
adjustment at this point or inserts a pause consisting of two levels and then continues the
adjustment beginning with the other limit value.
Page 60 of 143
Software "Rotary sensor with extensions 10FE1x"
Functional description
