Interface, Device Address, And Networking; Baud Rate, Data Format; Atmospheric Pressure Compensation And Temperature Compen- Sation - Ahlborn ALMEMO 2590-2 Operating Instructions Manual

13. Device configuration

13.4 Interface, device address, and networking

Via the serial interface you can output cyclic
data logs, all function values from the measur-
ing menus, and all the programming details for
the device and for the sensors to a printer or
computer (see Manual, Ch 6). For connecting
to the various interfaces we have a series of
data cables available; (see 14.1, Manual 5.2).
All ALMEMO devices can also be networked
®
together very easily thus enabling the user to centrally acquire and record mea-
sured values from several measuring instruments - even if these are located
far apart (see Manual 5.3). To communicate with networked devices it is abso-
lutely indispensable that each device should have its own baud rate setting and
its own dedicated address; this is because only one device should respond per
command. Before starting network operation ensure therefore that all the mea-
suring instruments involved are assigned different device addresses. For this
purpose use the function
normally set. This can be modified as desired by means of the usual data entry
procedure (see 8.5).

13.5 Baud rate, Data format

On leaving the factory the baud rate for all interface modules is programmed to
9600 baud. In order to avoid unnecessary problems when networking several
devices together the baud rate should not be altered; rather the computer or
printer should be set to match. If this is for some reason not possible you can,
in the Baud rate function, enter the values 1200, 2400, 4800, 9600 baud or
57.6, 115.2 kbaud (paying attention not to exceed the maximum baud rate for
the interface module in question). The baud rate setting is saved in the EEP-
ROM on the interface module and thus applies when used with any other
ALMEMO device.
To set the baud rate in function (see 8.5):
Data format: (setting cannot be changed) 8 data bits, 1 stop bit, no parity
13.6 Atmospheric pressure compensation and tempera-
ture compensation
Atmospheric pressure and temperature can both be set to compensate certain
sensors (see 10.2.5, 10.2.4). If these parameters are measured, the corre-
sponding measured values are also shown here :
Enter atmospheric pressure in function (see 8.5): Atm pressure : 1013 mbar
Enter compensation temperature in function : Temp comp : CT 31.0°C
The cold junction temperature is used to compensate thermocouple mea-
surement :
Cold junction temperature = socket temperature : CJ temperature :25.4°C
60 ALMEMO
Device address
® 2590
Device address :
Baud rate
Atm pressure
Temp comp
CJ temperature:
Hysteresis
Configuration:
Mªª Pª
. On leaving the factory address 00 is
Baud rate:
00
9600 baud
1013 mbar
45.7 °C
25.4 °C
10
-CR-----
9600 bd