Omron CS1W-MC221 -, Operation Manual

Page: 300 / 705

273
Interface Specifics Section 5-4
Forced Block End Bits
These bits are used to end execution of the current block. When a block is
ended, the remainder of the block will not be executed. Program execution will
start from the next block when restarted with the Cycle Start Bit. (The Pro-
gram Number Read Bit must be OFF to continue executing the same pro-
gram.)
Any axes that are operating will be decelerated to a stop. If the block being
executed is waiting for an M code reset, the M code will be cleared to 0, the M
strobe will be turned OFF, and then program execution will be stopped.
Operation of a Cycle Start Bit is disabled as long as the Forced Block End Bit
is ON. (The program won’t be executed when the Cycle Start Bit is turned ON
if the Forced Block End Bit is ON.)
The Forced Block End Bits have higher priority than Pause Bit (n+1 bit 05). If
both of these bits go ON at the same time, the block end will be ended.
Keep a Forced Block End Bit ON until the Program Execution Flag turns OFF.
Timing Chart
Word Task Bit I/O Valid mode
MC221 MC421
n+3 Task 1 04 Output Auto
n+5 Task 2
--- n+7 Task 3
--- n+9 Task 4
Signal Function
↑
Ends the block being executed.
1 As long as the bit remains ON, the program won’t be executed even if the
Cycle Start Bit turns ON.
Cycle Start Bit
(n+3, 02)
Program execution
Forced Block End Bit
(n+3, 04)
Program Execution
Flag (n+15, 04)
Program Number Read Bit
(n+3, 07)
OFF for continuous operation