
B-64014EN/03 SPECIFICATION 2.DATA SERVER FUNCTIONS
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Files (file1 to file5) specified in the file list on the host computer are
stored on the memory card built into the Data Server using FTP
transfer and supplied to the CNC. In the buffer mode, after the CNC
issues a request to read an NC program to the Data Server, the
specified file list is read from the host computer. When the first file
has been read, the Data Server starts supplying data to the CNC. For
this reason, it takes time from when the CNC issues a request to read a
program to when the Data Server starts supplying data.
While the Data Server is supplying the data in one area to the CNC, it
stores data into the other area using FTP transfer. For this reason,
divide the original program data so that two consecutive files can be
contained on the memory card built into the Data Server.
Although the data in one area has been supplied to the CNC, FTP
transfer may not terminate for the other area. In this case, program
calling terminates abnormally because the subsequent data cannot be
supplied. You can use a parameter not to cause the abnormal
termination.
In the file list, you can specify any file name allowed by the host
computer that consists of up to 255 single-byte alphanumeric
characters. Be sure to specify at least one LF (0A in hexadecimal) or
CR (0D in hexadecimal) following each file name in the file list to
delimit the file names.
NOTE
In the buffer mode, you can also register a new file
on the memory card built into the Data Server by
the "NC program GET" or "NC program output"
operation.
By this operation, however, the remaining capacity
of the memory card built into the Data Server that
is required for operation in the buffer mode may be
exhausted, resulting in an error in DNC operation
in the buffer mode.
For this reason, during DNC operation in the buffer
mode, do not register any new file on the memory
card built into the Data Server.