August 2020 – TD 316 OPERATING MANUAL – Motus Wave Sensor 5729
Page 87
6.2
Sensor startup
When property
Enable Text
is set to
Yes, StartupInfo
is displayed at sensor power up or after
Reset
.
StartupInfo
contains information about
Product Number, Serial Number, Mode, Protocol Version
and
Config Version
(Refer to
Figure 6-1: Start up info: communication using Tera Term
In order to minimize the current drain the sensor normally enters a power down mode after each sampling; the sensor
can be awakened by any characters on the Smart Sensor Terminal input, and will then after receiving the last character
stay awake for a time set by the
Comm TimeOut
property.
If the property
Comm TimeOut
is
set to other than ‘
Always On’
the
serial interface will not be activated after power-up (or the
Reset
command).
Any character will activate the serial interface, but a Carriage Return (CR or CR+LF), ‘/’ or ‘;’ are often preferred since these
characters do not interfere with the command syntax. The serial interface will then be active until a period of input inactivity
specified by the
Comm TimeOut
value (10 s,20 s,30 s,1 min,2 min,5 min,10 min).
The
Communication Sleep Indicator
, ‘
%
’, will be transmitted when the serial communication is deactivated, and the
Communication Ready Indicator
, ‘
!
’ is outputted subsequent to activation (electronics require up to 500ms start up time).
If
Comm TimeOut
is set to ‘
Always On’
the communication (and microprocessor) will be kept active all time.
The
Communication Sleep Indicator
‘
%
’ and the
Communication Ready Indicator
‘
!
‘ are not followed by Carriage
Return and Line Feed.
When communicating with the sensor, you may start by pressing
Enter
. The sensor will respond in two ways (
Comm
TimeOut
is 1 minute by default in the following description):
•
If the sensor is ready for communication, it will not send any response indicator. The sensor will stay awake and
ready to receive commands for 1 minute (controlled by the
Comm TimeOut
)
since the last command.
•
If the sensor is in sleep mode and not ready for communication, the sensor will send a
Communication Ready
indicator
(
!
) when awakened (within 500ms). The sensor will then be ready for communication.
