Engelmann
T h e h e a t m e t e r s p e c i a l i s t s
®
Engelmann Sensor GmbH, Rudolf-Diesel-Straße 24-28 , 69168 Wiesloch-Baiertal, Germany
Phone.: +49 (0)6222-9800-217 , Fax: +49 (0)6222-9800-50, E-Mail: [email protected], www.engelmann.de
Article-No. 1080700010 - 2011-04-01
Page 9
13
Interfaces and Options
13.1
Optical (infrared) interface
In order to be able to communicate with a
S
ENSO
S
TAR
®
2C
ins-
trument, an optocoupler must be connected to the USB or serial
interface of the PC. The optocoupler (USB or serial interface) and
the Engelmann
®
Monitor software are available as options.
The optical (infrared) interface is activated by pressing the
Engelmann pushbutton.
If within 60 seconds neither a valid telegram is received now the
pushbutton pressed again, then the interface is deactivated.
13.2 M-bus
interface
An M-bus interface is also available as a built-in option for the
S
ENSO
S
TAR
®
2C
(must be stated when ordering). An inst-
rument with an M-bus interface is supplied with power via the
M-bus network (no galvanic separation). The number of read-outs
via the M-bus interface per instrument per day is unlimited.
The valid standards for the M-bus protocol are EN13757-2 and
13757-3 and the M-bus recommendation (Version 4.8 from Nov.
1997) with the standard IEC 870 part 1,2 and 4.
Notes on installation:
•
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.
•
The installation of an instrument in an M-bus network may
only be carried out by authorized, quali
fi
ed technical
personnel.
•
Attention must be paid to ensure that the cable lengths and
cable cross-sections in the bus network are appropriate for
the baud rate of the end instrument (2400 baud).
•
Recommended cable type:
Telephone cable J-Y(ST) Y2 x 2 x 0.8 mm²
S
ENSO
S
TAR
®
2C
instruments with the M-bus option can be
addressed primarily or secondarily.
Both addresses can be set via the optical interface using the
Engelmann
®
Monitor software. They can also be set using the
display.
The primary address is the M-bus address displayed in the 2nd
level (technician’s loop) in menu item 6) ‘M-bus address (primary
address)’.
The secondary address is the customer identi
fi
cation no. and can
be selected under menu item 9) ‘Selectable customer-set
calculator no.’ ‚ in the
fi
rst level (the main loop).
If a customer no. has not been identi
fi
ed, the serial no. is
displayed. This is the factory setting.
13.3 Settings of the Datalogger
The datalogger is an optional additional function for meters and
calculators which must be speci
fi
ed in the original order (instru-
ments cannot be retro
fi
tted).
The Engelmann datalogger makes it possible to record consump-
tion data and the individual meter values in the internal storage
module in freely selectable time intervals. The recorded data can
be stored in various data formats, for example for analysis of
peak values in order to optimize cost-effective supply of heat.
The datalogger can be read out either via the optical interface or
via M-bus, so that the data can be used for individual analysis.
The Engelmann datalogger is a ring buffer. The current values
are always stored; this means that when the memory is full, the
oldest values are written over by each new piece of data.
The storage capacity is up to 10,589 values.
The software “Engelmann Datalogger“ reads out only one meter
at a time, which is addressed using the set primary address.
If only one meter is at hand, the address 254 can be used.
The following parameters can be individually set for recording,
singly or jointly, using the software “Engelmann Datalogger“:
•
time (is always stored)
• heat
energy
• cooling
energy
• volume
• power
•
fl
ow
• forward
fl
ow temperature
• return
fl
ow temperature
• temperature
difference
The meters values can be measured at the following freely
selectable time intervals:
•
1 minute
• 10
minutes
• 15
minutes
• 30
minutes
• 60
minutes
•
3 hours
•
6 hours
• 12
hours
• 24
hours
Depending on the con
fi
guration, the datalogger can store
between 2117 and 10,589 sets of data.
Note
:
All previous stored values are lost (deleted) upon
reparameterization!
