137
2. Programs can be continued even after the following operations.
Before continuing the program operation, be sure to confirm that existing
conditions will not cause any problem. If continuous program operation
causes a problem, do not continue running the program; instead create a
ladder program will execute the program from the beginning.
a) Program operation running under the automatic mode was stopped
intentionally or came to a stop by itself.
Examples:
Cycle start was turned OFF.
An error occurred.
b) Manual command was executed under the manual mode.
Examples:
Origin search was executed.
Jog was executed.
Servo lock was executed.
c) Reset to the automatic mode and cycle start turned ON (for executing
continuous operation).
For example, program operation was temporarily suspended while moving
to X10000 and has stopped at the X500 position.
Reset to manual mode and execute the origin search. After the origin search
is complete, reset to the automatic mode to continue program operation.
The program will continue the move operation to the X10000 position.
6-5-3 Word n+1 Bit 03: Single Block Bit (Task 1)
This bit is used to execute a single block of the program; it is valid only when the
mode is set to automatic mode. The Single Block Bit and Cycle Start Bit are used
together.
•
Single block execution can be performed by turning ON the Single Block Bit
and then turning the Cycle Start BIt ON and OFF.
•
When the program is being executed the status of the Cycle Start Bit is
checked at the start of each block; if it is ON, the next block will be executed and
program execution will be paused.
To switch from single block execution to normal program execution, turn OFF the
Single Block Bit and then turn ON the Cycle Start Bit. The program will be
executed continuously starting from the next block.
When the Single Block Bit is turned ON during Pass operation, the next block’s
positioning operation will be completed before program execution is paused.
The Single Block Bits for task 2 (bit 03 in word n+3) operate in the same way.
Signal
The status of the Single Block BIt is checked when the Cycle Start Bit is turned
ON and at the beginning of each block. When the bit is ON, program execution is
paused after the next block is executed.
Timing Chart
Cycle Start BIt
(n+1 bit 02)
Single Block Bit
(n+1 bit 03)
OFF so the signal isn’t
received at N004.
Program execution
Cycle Start Received Flag
(n+11 bit 09)
20 ms min.
20 ms min.
ON so the signal is
received at N005.
Interface Bit Specifics
Section 6-5
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