User`s manual

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3.1 Communication timing
The controller should wait for a packet interval before next command is sent.
The packet interval needs to be longer than 600msec for the
A2129(MDT552S/LDT552V) ” .
[Important Information]
HOST system shall send next command after receiving a reply command from Monitor, if it is sequential
commands communication. If Host doesn’t wait for monitor’s reply, monitor operation error may happen.
Time-out error handling operation in Controller: Host Controller shall wait the reply from Monitor,
after sending command as mentioned above. The time-out setting in Host Controller shall be more
than 30sec after sending command to Monitor. (Using the maximum command interval “a
MAX
” is most
safety.)
Communication disabled period after power on/off: After Monitor Power on, either by AC switch, Remote Controller or
Serial communication command, Monitor goes initialize mode of controller and can not handle the remote control
commands correctly during the mode. So do NOT send any command at least 14sec after monitor power on/off. If you make
the code which sends any command after POWER ON/OFF command, please put a wait at least 14sec after sending the
command.
About the other commands, please wait the each periods of command interval from PC. (See below example.)
When your system may output no signal, you have to set the menu “POWER SAVE (PC)” to OFF because of 14sec waiting.
[Available Command list at DC power off status]
A2129(MDT552S/LDT552V) can’t accept and reply any command except for the following commands when it is in DC
power off or power saving.
Power status Read / Read Model name Read / Serial number Read /Power on / Power off
[Network latency with control via LAN]
If you control A2129(MDT552S/LDT552V) via LAN interface, the network latency time will affect the control timing of
serial commands.
It is out of scope of document.
Please add necessary margin of wait time and interval of each command packet, based on the maximum available latency
time with your system and add appropriate error handling operation into your control program.