KROHNE IFC 300 Converter EN - Manual (Page 136)

6
OPERATION
136
IFC 300
www.krohne.com 08/2010 - 4000069803 - MA IFC 300 R04 en
Application error
F RAM/ROM error IO1 A RAM or ROM error is detected during the
CRC check.
Defective, replace electronic unit or
input/output module (I/O module).
F RAM/ROM error IO2
F Fieldbus Malfunction of the Fieldbus, Profibus or FF
interface.
-
Modbus or Ethernet interface malfunction
(can also appear with some Profibus or FF
errors).
-
F PF sensor error Malfunction reported by the level sensor. -
F PF sens. communication Communication error to the level sensor.
Either the connection is interrupted or the
measuring sensor is not powered up.
-
Messages on the display Description Actions
Status: F _ _ _ _ _ Application fault, device OK, but
measured values affected. Application test or operator action
necessary.
F application error Application-dependent fault, but device is
OK.
Group message, when errors as described
below or other application errors occur.
F empty pipe 1 or 2 measuring electrodes are not in
contact with the medium; measured value is
set to zero. No measurement possible.
Measuring pipe not filled; function
dependent on Fct. C1.3.2.; Check
installation. Or electrodes completely
insulated e.g. by oil film. Clean!
The two empty pipe messages cannot appear at the same time. The difference lies in
whether the measured value is also set to zero upon the detection of an empty pipe. The
sensor electronics will use one or the other function (setting to zero or further
measurement) depending on a selection made by the user.
F flow exceeding limit Measuring range exceeded, filter setting
limits measured values. No message if
empty pipe.
Limitation Fct. C1.2.1, increase values.
If this limit occurs sporadically in processes with air pockets, solid contents or low
conductivity, then either the limit has to be increased or a pulse filter used so as to quell
the error messages and also reduce the measurement errors.
F field frequency too high Field frequency is not reaching steady state,
a measured flow value is still being supplied
but may have errors. Measured values are
still supplied, but they are always too low.
No message if coil broken or bridged.
If Fct. C1.1.14 settling time is set to
"manual", increase value in Fct. C1.1.15. If
"standard" is set, set field frequency in
Fct. C1.1.13 acc. to signal converter
nameplate.
F DC offset ADC over-ranged by DC offsets. No
measurement can be performed, the flow is
set to zero. No message if empty pipe.
For remote signal converters, check the
connection of the signal cable.
F open circuit A Load on current output A/B/C too high,
effective current too low.
Current not correct, mA output cable has
open circuit or load too high. Check cable,
reduce load (set < 1000 ohm).
F open circuit B
F open circuit C
Messages on the display Description Actions
Status: F _ _ _ _ _ Operational fault in device, mA output ≤
3.6 mA or set fault current (depending
on the seriousness of the fault), status
output open, pulse / frequency output:
no pulses Repair necessary.