Operation – KROHNE MFC 300 EN User Manual

Page 90

OPERATION

MFC 300

www.krohne.com

02/2012 - 4000498602 - MA MFC 300 R03 en

C3. Limit Switch X

C3.

Limit Switch X

X stands for one of the connection terminals A, B, C or D

stands for Fct. no. C3.2 (A) / C3.3 (B) / C3.4 (C) / C3.5 (D)

C3..1

Measurement

Select: Volume Flow / Mass Flow / Diagnosis 1...3 / Flow Velocity /

Temperature / Concentration Flow 1 / Density

C3..2

Threshold

Switching level, set threshold with hysteresis

xxx.x ±x.xxx (format and unit depend on the measurement, see above)

(1st value = threshold / 2nd value = hysteresis),

condition: 2nd value ≤ 1st value

C3..3

Polarity

Set polarity, please note Flow Direction in C1.3.2!

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 (use for the output)

C3..4

Time Constant

Range: 000.1…100 s

C3..5

Invert Signal

Select:

Off (activated output generates a high current, switch closed)

On (activated output generates a low current, switch open)

C3..6

Information

Serial no. of the I/O board, software version no. and production date of the

circuit board

C3..7

Simulation

Sequence see B1. limit switch X

C3. Control Input X

C3.

Control Input X

C3..1

Mode

X stands for connection terminal A or B

stands for Fct. no. C3.2 (A) / C3.3 (B)

Off (control input switched off) /

hold all outputs (hold current values, not display and totalisers) /

output Y (hold current values) /

all outputs to zero (current values = 0%, not display and totalisers) /

output Y to zero (current value = 0%) /

all totalisers (reset all totalisers to "0") /

totaliser "Z" reset (set totaliser 1, (2 or 3) to "0") /

stop all totalisers /

stop totaliser "Z" (stops totaliser 1, (2 or 3) /

zero outp.+stop Tot. (all outputs 0%, stop all totalisers, not the display) /

external range Y (control input for external range of current output Y) - also

make this setting on current output Y (no check if current output Y is

available) /

Error reset (all resettable errors are deleted)

Zero Calibration

C3..2

Invert Signal

off (control input is activated when a current is applied at the input by voltage

to passive inputs or a low-value resistor to active inputs)

on (control input is activated when no current is applied at the input, low

voltage to passive inputs or a high-value resistor to active inputs)