Arcus DMX-ETH, Руководство пользователя

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DMX ETH Manual page 45 rev 1.16
Communication Time-out Feature (Watchdog)
DMX-ETH allows for the user to trigger an alarm if the master has not communicated
with the device for a set period of time. When an alarm is triggered, bit 10 of the
MST
parameter is turned on. The time-out value is set by the TOC command. Units are in
milliseconds. This feature is usually used in stand-alone mode. Refer to the Example
Stand-alone Programs section for an example.
In order to disable this feature set
TOC=0 .
Boot-up Sequence
Initial Boot-up:
DMX-ETH takes approximately 5 seconds to boot up from the moment that power is
supplied to the 2-pin connector.
Hard Reset detection:
After initial boot up, the DMX-ETH will begin to look for a hard reset input sequence. If
the first input pattern is not detected within 5 seconds, boot-up will skip to “Connection
detection”.
However, if the first input pattern is detected within 5 seconds, AND the full reset
sequence is reached, the flash memory will be reset to factory defaults. Once the flash is
reset, a power cycle needs to be performed in order to communicate via factory default
settings. See
Hard Reset (Flash Memory) section for details.
Connection detection:
If the hard reset input sequence is not detected, the device begins to look for an Ethernet
connection. If an Ethernet connection is not detected within 7 seconds, the controller
automatically times out and goes to the
Connection Time-out State . On the other hand,
if, a connection is detected within the 7 second time frame, the controller will go to Full
Connection State at the time of detection.
Note: During connection detection, the term “Ethernet connection” does not mean that a
socket connection has been established. Instead, it means that the device is connected to
an enabled / active Ethernet network / PC.
-
Connection Time-out State:
The controller could not detect an Ethernet
connection in the allowable time frame. In this case, any standalone program
that is set to run on boot-up will begin execution. Note that once this state is
entered, it will no longer be possible to communicate with the controller via
Ethernet. To communicate via Ethernet, a power cycle must be performed to
restart the boot-up sequence.
-
Full Connection State:
The controller found an Ethernet connection in the
allowable time frame. In this case, communication established by opening a
TCP/IP socket connection. Note that it is possible to close and re-open the