02/2014
_____________________________________________________________________________________________________________________
12
4. Fault conditions and fault signalling
No.
Error source
Error cause
Alarm LED
Analogue output
in error event
(programmable)
Alarms
(program
mable)
Restart after error
elimination
Remark
1
EEPROM:
check sum
incorrect
constant
light
alarm value or
instantaneous
value
--- ,
on,
off,
active
MTP200 must be
reconfigured,
reparametered, and
calibrated
Parameter table in
RAM loaded with
default values
2
16-Bit-controller:
RAM/EPROM
memory incorrect
constant
light
alarm value or
fixed value
--- ,
on,
off,
active
automatic
(after system reset))
Parameter set or
program damaged
3
8-Bit-controller:
Communication,
RAM or µP defective
constant
light
alarm value or
fixed value
--- ,
on,
off,
active
automatic
4
8-Bit-controller:
5V-supply
Incorrect
constant
light
alarm value or
instantaneous
value
--- ,
on,
off,
active
automatic
with ≥ 4 %
deviation from the
reference value
5
16-Bit-controller:
3V3- supply
Incorrect
constant
light
alarm value or
instantaneous
value
--- ,
on,
off,
active
automatic
with ≥ 4 %
deviation from the
reference value
6
Analog output:
signal deviation
constant
light
alarm value or
instantaneous
value
--- ,
on,
off,
active
automatic
configurable:
from ≥ 0.2 %
7
A/D-Converter:
signal deviation in
mV- measurement
circuit
constant
light
alarm value or
instantaneous
value
--- ,
on,
off,
active
automatic
configurable:
from ≥ 0.2 %
8
A/D-Converter:
signal deviation
in resistance
measuring circuit
constant
light
alarm value or
instantaneous
value
--- ,
on,
off,
active
automatic
configurable:
from ≥ 0.2 %
9
Transmitter:
sensor- oder
wire break
constant
light
alarm value or
fixed value
--- ,
on,
off,
active
automatic
10
Alarm outputs:
Relay contacts
Rel1, Rel2 or Rel3
defective
constant
light
alarm value or
instantaneous
value
--- ,
on,
off,
active
automatic
Parallel contact of
relay serves as
reference!
In general an alarm only remains queued for maintenance requirement for the duration of the
fault, signalled by Rel3 and the alarm LED. The fault source is shown in the Diagnostic
Manager in the
fields
Current Faults
and
Fault Memory.
A short fault occurring is
represented by a blinking alarm LED and the diagnostic manager only indicated in the fault
memory. Each case of faults is recorded and can be distinguished between a present fault
and a no longer fault by using the diagnostic manager.
