HEIDENHAIN MANUALplus 620 Technical Manual page 1787

Report an error to
the control
Request external
directory
Output selected file
Output marked files
January 2012
FE1 mode is set.
If an error occurs at a peripheral device, the following block must be sent to
the control:
<SOH><Error text><ETB>BCC
Peripheral device to control
<SOH> "Error"<ETB>BCC
The error message received will be displayed on the control. To continue
 Press the CE key.
FE1 mode is set.
In FE1 mode the following Escape sequence is sent to request the external
directory:
<DC3><ESC><DC1><0><SP><D><CR><LF>
The control expects the following input to this request:
xxxxxx<Code letters><Sectors><Name><P
1)
P = Protected (optional)
The first four lines, each ending in <CR><LF>, are ignored. In subsequent
lines ending with <CR><LF>, the program name and, after any number of
blank characters, the number of sectors are stored.
If the character combination <FREE:> is detected, only a number—the
number of free sectors—will be transferred.
The control requests the complete directory. The directory is saved and the
files of the selected type are displayed.
The peripheral device ends transmission with <EXT>. The control responds
with <EOT>.
Control to peripheral device
<SOH><K>Name<A><ETB>BCC
<STX> "1st line"<ETB>BCC
...
<STX> "last line"<ETB>BCC <DC1>
<ETX><EOT>
Marked files are output in the same protocol as for outputting the selected
files. After each file, the control characters <EXT><EOT> are sent to the
peripheral device.
9.7 Data Transmission Protocols
Control to peripheral device
<ACK><EOT>
1)
><CR><LF>
Peripheral device to control
<SOH><K>Name<A><ETB>BCC
<ACK>
...
<ACK>
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