Lighthouse Worldwide Solutions REMOTE 5104V, Руководство по эксплуатации

Страница: 49 / 78

Programming with MODBUS Protocol
248083293-1 Rev 7 5-3
MANUAL Counting Mode
In Manual counting mode, the computer starts the sample and the
instrument continues counting until a stop command is given. At that
point, the sample time is listed at whatever the time interval was
between the start command and the stop command.
Write these commands to the Command register (40002):
9
Start Instrument; to start recording.
10
Stop Instrument; to stop recording after desired sample time.
Configuring
with the
MODBUS
Protocol
Setting the Real Time Clock
The Real Time Clock (RTC) can be read in registers 40027 and 40028
as shown in Table 5-2.
Register 40027 is the high word for the real time clock; 40028 is the
low word. The date/time is calculated as the number of seconds since
midnight of 1/1/1970.
The date & time is stored in a 4-byte unsigned integer or as a 32-bit
unsigned integer.:
In order to change the RTC to the current local date/time, enter the high
and low values as unsigned integers to registers 40035 and 40036
respectively, which are the Data Set registers. See Table 5-3.
Table 5-2 Real Time Clock Registers
Register Data Type Description
40027 signed integer Real Time Clock (RTC) [high]. Works in
conjunction with 40028. Displays date and
time, in number of seconds since
midnight, 1/1/1970.
40028 signed integer Real Time Clock [low]
Table 5-3 Data Set Registers
Register Data Type Description
40035 unsigned integer Data Set [high]. Works in conjunction
with 40036. Data entered here is applied
to the device through the command
register.