INVENTIA MT-101, Руководство пользователя

Страница: 15 / 165

12
This record may be performed either remotely via GPRS or locally as the execution of a
user-defined program.
For each binary output, the state of forcing signal is compared with actual output state
signal. Upon detection of discrepancy, the
BiOutErr Flag is raised and may be used for rules
processing.
As stated before for Binary inputs, any binary output may be individually configured to
work either as binary input, counter input or quasi-analogue input.
That makes the hardware universal in application.
4.2.4. Serial ports
MT-101 Telemetry Module is equipped with two serial ports PORT1 and PORT2 .
PORT1 works only in RS232 mode and is dedicated to local configuration of parameters.
In order to perform local configuration, connect this port to a PC-class computer with
running MTM program. Operating parameters of this port are not modifiable and the length
of the connecting cable should not exceed 3 m.
This port is not isolated!
PORT2 is capable of operating in RS232 / 422 / 485 modes and serves communication with
external data sources. The interface and operating mode is selected during module's
configuration. This port is optoisolated.
4.2.5. Real time clock
MT-101 Module is equipped with astronomical time clock ( RTC ).
The clock is a base for defining working cycles of module, timers and time stamps for
measurement results recorded in registers. Imprecise clock setting results in faulty time
stamping and subsequent loss of vital information. For that reason, it is recommended to
set the clock to UTC time instead of the local time zone of the module's placement.
CAUTION!
The module's RTC clock does not automatically adjust to summer/winter
time. To avoid loss of data during manual time adjustment, UTC time is
recommended .
CAUTION!
The RTC clock is powered from an internal battery, and as long as it is
operational there is no need to reset the time after power-off. Since the
clock precision is not absolute, periodical time adjustment may be
necessary.
Setting the time is described in configuring mode documentation for the MTM program.
NOTICE!
The first configuration has to be performed locally, via PORT1 in order to
provide the module with basic GPRS communication parameters like PIN
code and APN name.