Dewetron DAQP-MULTI, Technical Reference Manual

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DEWETRON
data acquisition
system
RS-232/485
conversion on
DEWETRON-
motherboard
DAQx or PAD
module
RS-232
interface
RS-485
businterface
8
RS-232/485 interface
HSI/DAQP modules can be configured via
RS-485 interface, PAD modules require
this interface for all data transfers.
For all DEWETRON systems, an internal
RS-232/485 converter is available
(standard with DEWE-800, -2000, -2500, -3000, -4000, -5000 series systems). This converter allows
communication with HSI/DAQP and PAD modules.
To communicate with the modules, the RS-232 interface has to be set to the following parameters:
baud rate: 9600 bps
data bits: 8
parity: no parity
stop bits: 1
handshake: not required
HSI/DAQP module configuration
1. Push button selection
All ranges and filters can be selected directly by pressing the push buttons on the module. Approx. 15 sec.
after changing range and / or filter, the range and filter information is stored in an EEPROM. This procedure
increases the livetime of the EEPROM.
The current input range setting is shown all the time by LED. To change the range just press
RANGE
button
a few times until the required range is displayed.
To see the current filter setting just press the FILTER button once. The corresponding LED is flashing for
approx. 3 seconds. Within this time, the filter can be selected by pressing the FILTER button again. Approx.
3 seconds after the last key activity, the information will be stored, the LED stops flashing and shows the
input range again.
CAUTION: Power loss during this time leaves the module in the former settings.
2. RS-232/485 programming
All ranges and filters can also be selected via RS-232/485 interface. All new DEWE-800, -2000, -2500,
-3000, -4000, -5000 series systems are prepared as a standard to work with HSI/DAQP modules.
The easiest way to change the configuration is to use the DEWEConfig software, which comes as a standard
with the DEWETRON data acquisition system.
Detailed information about HSI/DAQP modules programming for customer applications is available in the
DEWE-Modules Programmers Reference Manual .
CAUTION: All range and filter changes which are done via RS-232/485 interface are not stored in the
EEPROM of the HSI/DAQP modules! You have to store this information in a separat initialisation file to
keep settings information for next system start!
PAD module communication
All PAD modules are only working through the RS-232/485 interface. All new DEWE-800, -2000, -2500,
-3000, -4000, -5000 series systems are prepared as a standard to work with PAD modules. The easiest
way to change the configuration is to use the DEWEConfig software, which comes as a standard with the
DEWETRON data acquisition system.
Detailed information about PAD modules programming for customer applications is available in the
DEWE-Modules Programmers Reference Manual
.
General Module Information