TV One C2-6204 handleiding
Handleiding
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MNL- C2-6204-V3.00 39
on the unit. For instance, just by turning FREEZE on, by pressing the FREEZE button, will cause RS232 data
to be sent to the computer that represents the command required to set FREEZE on. A second press, to
turn FREEZE off, then sends the computer the command required to turn the FREEZE off.
Note: Any command you send to the unit will be replied to either with an error code or with the actual
changed value. This may be different to the one you sent; for example, if trying to set a value too high or
too low.
Serial / IP control specification
Note: Not all units support Serial and/or IP (Ethernet) communications – check to see if this feature is
present on your unit.
This section outlines how to control a unit via a Serial or Ethernet link (if fitted to your unit), using ASCII-
based commands. It details how to send and receive serial data to perform many of the functions that a
user has access to on the unit.
Not all units will support the full range of adjustments listed – this will depend on the complexity of the
unit you have.
Communication protocol basics
Packets of ASCII data containing hexadecimal numbers are exchanged between the unit and controller via
a Serial or IP link (you cannot use both at the same time).
The Serial standard is 57600 baud, 8 bits, no parity and 1 stop bit, although this can be changed by the
user (see ‘System’ menu).
No flow control is used - however all control packets start with an ASCII 'F', end with carriage-return (13
decimal, 0x0D hexadecimal) and all such packets sent to the unit will be acknowledged (thereby provided
software handshaking). Note that a line-feed (LF) should not be sent.
It may take around 30ms (0.03 seconds) for an RS232 command to be actioned and acknowledged – this
will vary between different models.
ASCII-hex data is used where a number is encoded into its hexadecimal equivalent with leading zeros –
e.g. Where '00' is decimal value 0, '80' is decimal 128 and 'FF' is decimal 255. In other words, two
characters are sent for each byte encoded.
Any gap of more than 1 second between the characters of a control command sent will cause a time-out -
and previous characters sent will be lost.
Write packets (sending command functions to the unit) are always 20 characters long (including a carriage
return at the end). The unit will respond with a full 20 character message indicating what has changed.
This returned payload will reflect the actual value of the parameter changed. If the user requests a value
out of bounds then the limit value is used, and the payload will then reflect the limited value used.
Read packets (sent to request information from the unit) are always 14 characters long (including a
carriage return at the end), the response from the unit will be a 20 byte message with the Write flag (since
it is ‘writing’ the value back to the host) and the ACK flag set.
The ACK flag will be returned as 0 if the command is invalid for some reason – for example a bad
FUNCTION, WINDOW, OUTPUT or PAYLOAD value. An ACK=0 message will be otherwise identical to the
one you sent, so you know exactly which message has the error.
Any changes made to the unit using the front panel controls will also cause the full 20 byte message to be
sent indicating the change that has occurred, thus enabling a program to stay ‘in-sync’ with the unit. In
some cases (such as the execution of a macro) multiple 20 bytes messages will be sent indicating all the
parameters that have been changed.
Only one message should be sent to the unit, another message can’t be sent until a specific response is
received from the unit (the user should look for a message with the same WINDOW, OUTPUT and
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Productinformatie
| Merk | TV One |
| Model | C2-6204 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 7375 MB |