Van Essen Diver-MOD-AS339, Руководство по эксплуатации продукта, Страница: 15 / 31

© July 2017 Van Essen Instruments. All rights reserved .
10
Example:
Description
Function
code Register
Size
(registers)
Data
field Remark
1
Read the remaining
battery capacity of Diver
0x04 30243 1 - Register 30243, integer value
0-100% remaining battery
capacity
4 Reading Diver Data
The data from the connected Diver is copied to the internal memory of the Diver-MOD. This is a
background process of the Diver-MOD. The update interval for this process can be set in register
00002. Because the data is stored in the Diver-MOD, the Diver data can be retrieved much faster from
the Diver-MOD than if it must be read from the Diver.
The Diver data consists of two parts: the header information and the time series data.
4.1 Header Information
The header information is stored in registers 30301 to 30481. The data is stored in ASCII. The header
information is required to obtain the time series data in engineering units. The header information
contains specific information about each parameter (channel) measured by the Diver, the Diver
serial number, the monitoring point name (location), etc.
The following data is required to obtain the time series data in engineering units.
Start Date/Time
The start date/time must be read from 9 registers starting at 30464. The returned string has the
following format:
ss:mm:HH dd/MM/yy
For example, the returned string is “00:00:01 10/08/15”, which equals 1:00:00 AM on August 10, 2015.
Sample Interval
The sample interval must be read from 7 registers starting at 30455. The returned string has the
following format:
DD HH:mm:ss f
Where DD is number of days and f is tenths of a second; f will be 0 or 5. For example, the returned
string is “00 01:00:00 0”, which equals a sample interval of 1 hour.
Pressure Reference and Range
The pressure data is stored in channel 1. The unit of pressure is cmH2O (conventional). By definition
1 cmH2O equals 98.0665 Pascal.
The pressure reference is defined as the value (offset) in cmH2O from which the Diver starts
measuring pressure. For all supported Divers this is 400 cmH2O. The pressure reference can be read
from register 30101. The returned value is a signed 16 bit integer, for example “400”.