Burkert 8718 Operating Instructions Manual page 36

Binary inputs
If the binary inputs are activated, different operations can be run on the LFC / LFM, and the latter can be
switched to a specific operating mode. Activation occurs by connecting the particular binary input to DGND
for at least
0.5 s (for binary inputs).
Possible binary input functions
Function
Actuate Autotune
Switch to characteristic 2
Reset totalizer
Start set-point value profile
Control mode
Correct safety value
Close valve completely
Open valve completely
The operating principle of the binary input (active / inactive) can be selected for these functions
5)
Table 5: Binary input functions
Standard assignment of the binary inputs:
Input
Binary input 1
Binary input 2
Binary input 3
6)
not available for 8718 / 8708
6)
Table 6: Standard assignment of the binary inputs
36
Description
Start of Autotune function for optimization of the control param-
eters to the conditions available in the system, description see
chapter 8.3. Functions of the LFC / LFM.
The calibration curve saved under Gas 2 as well as using all param-
eters entered there.
The integrated totalizer (quantity integrator) is reset to 0.
Start of the saved set-point value profile, description see
chapter 8.3. Functions of the LFC / LFM.
Switch to control mode for the systematic opening of the integrated
proportional valve, description see chapter 8.3. Functions of the
LFC / LFM.
Correct the safety value stored in the device as a flow-rate set-point
5)
value.
The flow-rate set-point value applied analogically or transmitted by
the field bus is ignored in this case.
Valve closed completely.
5)
The flow-rate set-point value is ignored in this case.
Valve opened completely.
5)
The flow-rate set-point value is ignored in this case.
Configuration
LFC: Actuate Autotune
LFM: unused
LFC: Open valve completely
LFM: unused
unused
english
Type 8718, 8719 / 8708, 8709
Operation and function