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TCIC User’s Manual
25
4. Command Set
The communication with the TCIC is via USB (standard), or RS232
or RS485 (optional).
Notes
1. After the TCIC has been powered-on, user application
software should send a single null (0x00) character to
the TCIC, prior to commencing regular communications.
2. There is one more command (card selection in a multi-card
system), described in the next section (section 5).
4.1 Requesting Data
‘>’ The TCIC returns a string containing the 8 actual channel
values, each followed by a tab (0x09). The end of the string
is followed by CR/LF. Each value is padded to have a fixed
length of 8 characters, so the string has a fixed length of 72
characters (excluding the CR/LF).
That is, the contents of the string is:
Channel 1 r tab character
Channel 2 r tab character
Channel 3 r tab character
Channel 4 r tab character
Channel 5 r tab character
Channel 6 r tab character
Channel 7 r tab character
Channel 8 r tab character
CR/LF
►
The channel values may represent ºC, ºF or millivolts,
depending on the Card Settings selection.
►
In case a channel has been defined in the Card Settings as
a ‘thermocouple’ source (Input Type is
not
mV)
and
the card
recognises that the channel is disconnected, that channel
value will be ‘9999.000’, indicating an ‘open’ condition.