janitza RCM 202-AB, Руководство пользователя и технические данные

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www.janitza.de RCM 202-AB
RCM 202-AB 17
The measured value memory is described circularly (circular buffer principle). If the
memory is full, the oldest data is overwritten. The period of time until the stored, his-
torical data is overwritten is dependent on the measurement interval (time base for
averaging). The measurement interval is set in the configuration menu.
Measurement interval for averaging Period of time available
60 s (1 min) 13 days
300 s (5 min) 65 days
600 s (10 min) 130 days
900 s (15 min) 195 days
1800 s (30 min) 390 days
3600 s (60 min) 780 days
Tab. 1: Available memory as a period of time depending on the measurement interval
The data set contains the following values, which are calculated as the mean value
over the set measurement interval:

Start and end time of the interval

Total current (residual current type B+)

Total current up to 2 kHz (residual current type B)

Direct current

Alternating current with frequencies up to 2 kHz (residual current type A)

Alternating current with frequencies up to 20 kHz

Fundamental oscillation
The measured value memory is not deleted automatically during operation. Data read
is not lost, except it is overwritten during the circulation of the memory. Therefore,
multiple databases (even on different computers) are kept current. When updating, a
database only reads out the data that has been newly stored since its last updating.
It is possible to manually delete the measured value memory via the configuration
menu.
6.5 RS485 interface (Modbus)
The RCM 202-AB has a Modbus interface (RS485) and works with the Modbus RTU
protocol as a slave. The device address 1 and the baud rate of 19200 baud are fac-
tory-set.
WARNING
The open ground connection of the RS485 interface may not be touched!
There is a risk of electric shock.