Campbell TX321, Руководство по эксплуатации продукта, Страница: 41 / 86

TX321 Transmitter
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8.2 Fault Button
FIGURE 8-1. TX321 Fault Button
The Fault button indicates whether or not the fail-safe has been tripped. Press
and hold the Fault button for about 2 seconds. The Status LED flashes once to
indicate the fail-safe has not been tripped, and flashes twice to indicate the fail-
safe has been tripped. To clear the fail-safe, press and hold the Fault button for
about 10 seconds.
8.3 Result Codes
Result Code parameters are included in CRBasic GOESData() and
GOESSetup() . The result codes indicate whether the instruction executed
successfully. When successful, a 0 will be stored in the variable or input
location. A positive result code indicates a communications problem (see
TABLE 8-1 ).
To better understand the communication result codes, it is necessary to
understand the sequence of communications with the transmitter. Here are the
steps:
1) The data logger CS I/O port is checked to see if the serial port is available.
If not,
Result Code
is
6
.
2) The transmitter is addressed and should return the STX character within
200 ms. If there is no response from the transmitter, Result Code 2 is returned.
If something other than the STX character is received, Result Code is 3 .
3) The command to select a data buffer is sent (random or self-timed). The
transmitter should respond with the ACK (06) character. If something besides
the ACK is received, Result Code is 4 . If nothing is received within 500 ms,
Result Code is 5 .
4) If the first three steps are successful, the data logger sends the command to
append or overwrite the data buffer, followed by the data. If the transmitter
does not respond with the ACK character within 500 ms after the data has been
transferred, the Result Code is 7 . Result Code 7 indicates the data was not
received by the transmitter. The data logger cannot resend the data.
Fault Button