Checkpoints For Program Restart - Mitsubishi Electric EZMotion-NC E68 Series Operation Manual

2.5.5 Checkpoints for Program Restart

(1) Set the tool offset amounts and parameters before proceeding with the program restart search. If
the conditions for such are not set beforehand, it will not be possible for the axes to return to the
proper machining start position.
(2) Do not conduct automatic operations during program restart.
It will not be possible for the axes to return to the proper machining start position if either
operation is conducted during program restart. ("During program restart" means the period from
the program restart search to the start of the searched program.)
(3) It will not be possible for the axes to return to the proper machining start position if a program
using user macro external signal input, machine coordinate readout or external mirror image
commands is the object of the restart search.
(4) When an attempt is made to shift the coordinate systems by manual or MDI interrupt while the
previous machining program is being executed, it will not be possible for the axes to return to the
proper machining start position.
(5) If memory operation type 1 is used, there is no need to implement the unmodal search for the
head of the program. The operation start block of the previously operated program is stored
inside and the type 1 restart search commences the search (modal search) from the previous
operation start block and it locates the designated block. Consequently, unmodal searches are
invalid even if they are conducted.
(6) When type 2 is used with type A (standard specifications), the message "E80 TOP SEARCH
ERR" will appear if an unmodal search is not executed and search is directly attempted with type
2. Conduct the unmodal search first.
(7) If either type 1 or type 2 is used, it is not possible to search blocks with macro statements during
the restart search operation. (This will result in the "E13 NB NOT FOUND" error.)
To initiate a restart search for blocks with macro statements, first set the "#2 MACRO SINGLE"
control parameter ON and then proceed. However, the tool path may change because of the
relationship of the radius compensation, corner rounding/chamfering and geometric read ahead
blocks.
(8) When conducting restart with a tape operation, it will not be possible to return to the proper
machining start position if operation is started midway through the tape.
(9) Control command or external output command in a macro statement cannot be used during IC
card operation or tape operation.
When executing restart search, if a control command exists in the IC card or tape, the program
error (P295) will occur; if an external output command exists in the IC card or tape, the program
error (P460) will occur.
(10) The program number cannot be omitted when conducting a search with type 1 or 2 for type A
(standard specification). If this number setting is omitted, the "E01 SETTING ERROR" message
appears and restart search is not executed.
Reset the program number and proceed again with operation.
(11) If a type 2 search is executed when using type B, the designated sequence No. and block No. will
be searched for in all programs within the designated program numbers. Note that if the same
sequence No. is found in the main program and subprograms, the No. of appearances
designation P will be the number of times for the entire program.
(12) If the axis returning to the restart position is a linear type rotary axis, the axis will return to the
workpiece coordinate position.
(13) When using type 3 (T command restart), the N number must be issued before the first T
command block in the program to be searched.
(14) When using type 3 (T command restart), there must be one or more N number within 100 blocks
of the program.
(15) When using type 3 (T command restart), the only T commands that can be searched are the main
program and the subprogram (nesting 1) called from the main program.
(16) When using type 3 (T command restart), if the program is edited before restart search and the
position of the T command block executed last differs from the execution, the error "E98 CAN'T
RESEARCH" will occur when the search is started.
(17) Do not carry out the type 3 (T command restart) indexing operation by unmodal search.
2.5 Resuming the Program
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2. Monitor