User's Manual

Serial communication protocol
the notification pending query flag in subsequent answers to an XDATA command.
It is the task of the master to use a reasonably short polling interval and to check
for presence of this flag in the XDATA result frame.
After receiving a notification frame, it is the task of the host to issure the
appropriate NPND commands to see which device has a notification pending and
to clear the pending notifications on both the A440 wireless modem and the A740
device.
3.5.5 Returned errors list
Following are error messages you might get.
Command line interpreter
1 — nonexistent command
2 — command line buffer overflow (input line too long)
3 — internal error
4 — reserved
5 — missing or false parameters in command
6 — operation not implemented
7 — remote version not allowed
9 — command not allowed via this interface
Device descriptors and storage handler
10 — device not found (attempt to perform a command on a nonexistent device)
11 — device already exists
12 — reserved
13 — no more space for descriptors (too many devices)
14 — no more records for the specified device
15 — temporary communication break, no more data (last request was not
successful)
16 — time-out (the handler blocked or is busy)
17 — internal error
18 — attempt to insert a reserved device ID number (0 or 65535)
19 — operation not permitted
Real time clock
20 — incorrect time supplied (no conversion to time_t was possible)
21 — date/time not yet initialized
Radio interface
30 — error at receive (CRC, etc.)
31 — unexpected frame received
32 — wrong length
49