KROHNE MFC 400 EN - Manual (Page 77)

OPERATION
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77
MFC 400
www.krohne.com 08/2013 - 4002075802 - MA MFC 400 R02 en
C3.3.11 Special Functions This function is only available at the terminal B frequency output. At the
same time, 2 frequency outputs must be available:
1st output at terminal A or D / 2nd output at terminal B
The B output is operated as a slave output, controlled and set using master
output A or D
Select:
Off (no phase shift) /
Phase Shift w.r.t. D or A (slave output is B and master output is D or A)
C3._.12 Information Serial no. of the I/O board, software version no. and production date of the
circuit board
C3._.13 Simulation Sequence see B1._ Frequency Output X
C3._ Pulse Output X
C3._ Pulse Output X X stands for one of the connection terminals A, B or D
_ stands for Fct. C3.2 (A) / C3.3 (B) / C3.5 (D)
C3._.1 Pulse Shape Specify the pulse shape
Select:
Symmetric (about 50% on and 50% off) /
Automatic (constant pulse with about 50% on and 50% off at 100% pulse
rate) /
Fixed (fixed pulse rate, setting see below Fct. C3._.3 100% pulse rate)
C3._.2 Pulse Width Only available if set to "Fixed" in Fct. C3._.1.
Range: 0.05…2000 ms
Note: max. setting value Tp [ms] ≤ 500 / max. pulse rate [1/s], gives the pulse
width = time where the output is activated
C3._.3 Max. Pulse Rate Pulse rate for 100% of the measuring range
Range: 0.0…10000 1/s
Limitation 100% pulse rate ≤ 100/s: I
max
≤ 100 mA
Limitation 100% pulse rate > 100/s: I
max
≤ 20 mA
C3._.4 Measurement Measurements for activating the output
Select: Volume Flow / Mass Flow
C3._.5 Pulse Value Unit Selection of the unit from a list, depending on the "measurement"
C3._.6 Value Per Pulse Set value for volume or mass per pulse
xxx.xxx, measured value in [l] or [kg] depending on setting in C3._.6
At max. pulse rate see above 3._.3 "Pulse Output"
C3._.7 Polarity Set polarity; the flow direction in C1.3.2 must be noted!
Select:
Both Polarities (plus and minus values are displayed) /
Positive Polarity (display for negative values = 0) /
Negative Polarity (display for positive values = 0) /
Absolute Value (always displays positive, with both negative and positive
values)
C3._.8 Low Flow Cutoff Sets the measurement to "0" for low values
x.xxx ± x.xxx%; range: 0.0…20%
(1st value = switching point / 2nd value = hysteresis),
condition: 2nd value ≤ 1st value
C3._.9 Time Constant Range: 000.1…100 s
C3._.10 Invert Signal Select:
Off (activated output: switch closed) /
On (activated output: switch open)
.book Page 77 Monday, August 26, 2013 9:05 AM