Reference Manual

Turbo PMAC/PMAC2 Software Reference

Turbo PMAC On-line Command Specification 296

See Also:

I-Variable I4909

On-line commands CPU, TYPE, VERSION, VID

CLEAR

Function: Erase currently opened buffer.

Scope: Port specific

Syntax: CLEAR

CLR

This command empties the program buffer (PROGRAM, PLC, ROTARY) that is currently opened on the

port over which the command is given. If used to empty an open rotary motion program buffer, it only

affects the buffer for the addressed coordinate system on that port.

If there is no open program buffer, or if the program buffer that is open was opened from another

communications port, the CLEAR command will be rejected with an error, reporting ERR007 if I6=1 or 3.

Note:

Prior to V1.936 firmware, an open buffer could be accessed from any port, and the

CLEAR command could be used on one port to empty a buffer that had been

opened on another port. Starting in V1.936, a CLEAR command could only be

used to empty a buffer opened from the same port.

Typically, as a buffer file is created in the host computer, start with the OPEN {buffer} and CLEAR

commands (even though these lines are technically not part of the buffer), and follow with the actual

contents. This will allow easy edit of the buffers from the host and repeated downloading of the buffers,

erasing the old buffer’s contents in the process.

Example:

OPEN PROG 1 ; Open motion program buffer 1

CLEAR ; Clear out this buffer

F1000 ; Program really starts here!

X2500 ;...and ends on this line!

CLOSE ; This closes the program buffer

OPEN PLC 3 CLEAR CLOSE ; This erases PLC 3