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9. Error Codes
When the instrument detects an error, the error symbol
and number are displayed.
The error can also be displayed by selecting the menu
item 8) 'error display' in the fi rst level / main loop (see
no. 8. Display).
There are seven possible causes of error, and they can appear in
combination with each other, depending on the situation.
The discription of the faults can you see over the display.
Error Description
Error
Effect
ff-sensor
No calculations are carried
fault
out. The registers for fl ow
and energy are not being
updated (no new data is
being stored).
rf-sensor fault
No calculations are carried
out. The registers for fl ow
and energy are not being
updated (no new data is
being stored).
electronic fault
No calculations are carried
out. The registers for fl ow
and energy are not being
updated (no new data is
being stored).
coil fault
No calculations are carried
(the scanning is
out. The registers for fl ow
not functioning
and energy are not being
properly)
updated (no new data is
being stored).
reset
The measurements since
the last storage of data in
the E
PROM are lost (max.
2
one day)
electronic fault
After a reset, the instrument
is without function.
electroic fault
No calculations are carried
out. The registers of fl ow
and energy are not being
updated.
Display
binär
1 at 1st position
1 at 2nd position
1 at 3rd position
1 at 4th position
1 at 5th position
1 at 6th position
1 at 7th position
Example: Scanning coil fault
Error
Errorcode
Binary display
LCD
Elster Messtechnik GmbH, Otto-Hahn-Straße 25, 68623 Lampertheim
Tel: +49 (0) 6206 933 0, Fax: +49 (0) 6206 933 100, www.elstermesstechnik.com
Artikel-Nr. 0080100072 - 2010-08-23 (F90MAMS_M_09.03e / 08.10)
Possible cause
Sensor cable se-
vered; sensor cable
shorted out.
Sensor cable se-
vered; sensor cable
shorted out.
A defect on the
calculator circuit
board.
Coil shorted out;
connecting cable
between calculator
housing and fl ow
sensor damaged.
EMC
Defective
component.
Defective
component.
Display
Description
hexadecimal
electronic fault
error 40
electronic fault
error 20
Reset
error 10
scanning coil fault
error 08
electronic fault
error 04
RF-sensor fault
error 02
FF-sensor fault
error 01
When an error occurs
energy), with the exception of the „reset" error, the instrument
must be exchanged and sent to the manufacturer for examination.
10.
Interfaces and Options
10.1. Optical (infrared) interface
In order for a PC to be able to communicate with a F90M AMS -
instrument, it is necessary to connect an optocoupler to the
corresponding interface of the PC. The optocoupler and the
necessary software are available as options.
The optical infrared interface is activated with the key.
If within 60 seconds neither a valid telegram is received nor the
key pressed again, then the interface is deactivated.
10.2. M-bus
An M-bus interface is also available on request.
It is important to ensure that the structure of the bus network
(length of connecting cables, cable diameter) corresponds to
the baud rate (2400 Bd) of the instrument connecte.
The M-bus protocol complies with standard EN 13757-2,
EN 13757-3, EN 1434-3, with the M-bus Recommendation
(version 4.8 dated Nov. 1997), standard ICE870 ports 1,2 and 4.
During communication with a heat meter via M-bus the other
instrument interfaces (key, opto head) cannot be used.
Note
:
•
Each end instrument is only protected against high voltage up
to the maximal allowed bus voltage (±50V). Additional
protective measures must be provided by the level converter.
•
In a 250-slave M-bus network (maximum 250 heat meters),
24 requests per day are possible for each meter. If fewer
requests are made and/or fewer heat meters are connected
to the bus, the unused amount of available requests is stored
in the instrument (max. amount: 300 requests).
•
The installation of an instrument in an M-bus network may only
be carried out by authorized, qualifi ed technical
personnel.
Recommended cable type:
Telephone cable J-Y(ST) Y2 x 2 x 0,8 mm
10.3. Pulse output (potential-free)
The potential-free pulse output available as a built-in
option (state when ordering) of the F90M AMS is an electronic
switch for fl exible use (class A0 according to EN1434), which
outputs the counting pulses of the heat meter.
The pulse output closes corresponding to the pulse value (see the
identifi cation plate on the instrument). As long as the nominal and
boundary values of the contact are taken into consideration, the
user is free to defi ne his contact data within a wide range. A wide
variety of data acquisition instruments can be connected to the
contact outputs.
The pulse value is indicated on the instrument.
Pulse value:
Heat:
1kWh/Imp or optional
Volume: 100 L/Imp
Pulse output:
Max. switching current (peak)
Max. switching voltage
Max. switching power
Insulation resistance
Contact resistance
Errorcode
Contact capacity
hexadecimal
Maximum current
( LCD)
Dielectric strength (open contact)
Closing time
Distance between pulse
Page 4
in the standard display (Total heat
2
300 mA ~/-
35 V ~/-
300 mW
09
> 10
Ohm
max. 25 Ohm
1.5 pF
120 mA
350 V ~/-
125 ms
125 ms
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