KROHNE IFC 110 Converter - Manual (Page 64)

Sect. 6.8 Part C Special applications, functional checks, service, and order numbers
64 IFC 110 F 05/2003
6.7 Quickly changing flows
Application
For filling processes, high-speed control circuits, etc.
Resetting the signal converter, see Sections 4 and 5.
Changing the settings
• Fct. 1.02 TIMECONST. (change the time constant)
– Change the setting to ”ONLY I” and set time to 0.2 seconds.
• Dynamic behaviour for sizes DN 2.5-300 and
1
/
10
-12 inch
Dead time: approx. 0.06 at 50 Hz line frequency
approx. 0.05 at 60 Hz line frequency
Time constant: as set above, current output (mA) then is 0.1 seconds
• Reduction of dead time by factor 3 (possible by changing the magnetic field frequency)
Change Fct. 3.02 FLOW METER, subfunction ”FIELD FREQ.” to ”1/2”,
only recommended for PROFIFLUX 5000 F (DN 2.5-100 and
1 /
10
-4 inch)
and ALTOFLUX 4000 F (DN 10, 15, 50-100 and
1
/
10
,
1
/
2
, 2-4 inch),
for other types and sizes please consult factory.
6.8 Changeover of current output, active / passive mode
Standard factory setting: active mode
The current output can be changed over to the passive mode. This requires a power source,
either an external one or via the isolated internal one (24 V DC), power terminals E+ / E-.
See Sect. 2.6 for connection diagrams.
Proceed as follows to change over from active to passive mode, or vice versa.
Changes on the I/O circuit board (inputs/outputs), see diagram in Sect. 8.7
Switch off power source before opening the housing!
1)
Remove glass cover from control compartment (detach 4 screws).
2) Remove cover from terminal compartment (detach 2 screws).
3) In terminal compartment, pull off all plug-in terminals.
4) Detach 4 screws from the front panel F and carefully pull complete electronic unit out of the
converter housing using the grip at the top of the front panel.
5) Place electronic unit down on front panel F.
6) Detach the two fastening screws SLP from the I/O board (inputs/outputs) and carefully pull
the board out of the pin base, see figures in Sect. 8.7.
7) On the printed side of the I/O board, transpose the two jumpers X3 and X6, in the same
direction, to Position A (= active mode) or Position P (= passive mode).
8) Reassemble in reverse order, Points 6) - 1).
9) Please note:
In the passive mode, load impedance monitoring under Fct. 1.04 DISPLAY and
DISP. MESSAGES - yes is not possible.