Campbell Scientific TX320 Transmitter - Manual (Page 40)

TX320 Transmitter
Parameter 1 allows you to determine what command will be issued to the
TX320.
Parameter 2 is the starting input location for the string of information the
TX320 will return.
Each P127 command returns a string of information. Each command requires
a different number of input locations. The first piece of information returned is
always the result code of the command. TABLE 7-5 lists the result codes and
explains them.
TABLE 7-5. P127 Result Codes
0 Execution successful
1 Checksum error in response
2 Time out waiting for STX character after addressing
3 Something besides STX received after addressing
4 Received a NAK
5 Timed out while waiting for an ACK
6 CS I/O not available
7 Transmit random message failure, could be no data in random buffer
9 Invalid command code
7.6.5.1 P127, Command 0: Read Time
Retrieve the GPS time from the transmitter. The time is Greenwich Mean
Time (GMT). A time of 153 hours, 153 minutes, 153 seconds indicates GPS
time is not available.
TABLE 7-6. P127 Command 0: Read Time
In Loc Contents
1 Command Result Code
2 Hours (GMT)
3 Minutes
4 Seconds
7.6.5.2 P127, Command 1: Read Status
Read Status Command provides information specific to the next scheduled or
random transmission, including the amount of data in the buffers and power
supply voltage.
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