W&T 57630, Manual

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106
W&T
TCP / UDP - Binary
The IO structure Send Mode
This structure is used to specify the trigger conditions with
which the Web-IO sends the state of the inputs to the user pro-
gram. There are basically three possibilities, but they can all be
combined with each other:
1. The user program polls the Web-IO by sending the READ
structure
2. The Web-IO sends the WRITE structure with the state of the
inputs at a configurable interval
3. The Web-IO sends the WRITE structure with the state of the
inputs after a state change of the configured inputs
SendMode WORD send_sequenz always 0
(PC -> Web-IO) WORD rec_sequenz always 0
WORD struct_type 0x0010
WORD length 0x000C
WORD ea_bits bit mask of input trigger
WORD interval polling interval in 100ms
The IO structure ReadCounter
The user program sends this structure to the Web-IO to request
the counter state of a certain input counter. Which input is intended
is sent in the variable
counter_index . The Web-IO always replies
with the COUNTER structure.
ReadCounter WORD send_sequenz always 0
(PC -> Web-IO) WORD rec_sequenz always 0
WORD struct_type 0x00B0
WORD length 0x000A
WORD counter_index Input 0..11 (23 for Web-IO 24)
The IO-Structure ReadClearCounter
The application program sends this structure to the Web-IO in
order to request the counter status of a particular input counter
and then immediately set to counter to 0. Which input this
involves is transmitted in the variable
counter_index . The Web-
IO always replies with the structure COUNTER .
ReadClearCounter WORD send_sequenz always 0
(PC -> Web-IO) WORD rec_sequenz always 0
WORD struct_type 0x00C0
WORD length 0x000A
WORD counter_index Input 0..11 (23 for Web-IO 24)