Omron CQM1H-SCB41 operation manual Precautions on Using the Force Abort Bit

Using Protocol Macros Section 5-7

Precautions on Using the Force Abort Bit

The Protocol Macro Executing Flag will turn OFF as soon as the Forced Abort Bit is turned ON from the ladder program. The Forced Abort Bit must remain ON for at least 15 ms longer than the CPU Unit cycle time. Thus, the sequence will not be aborted if the Forced Abort Bit is turned OFF as soon as the Protocol Macro Executing Flag turns OFF.

If only the Protocol Macro Execution Flag is used in an NC condition for PMCR(––), PMCR(––) will be executed during abort processing, and system er- ror (FAL 9C) will occur. Wait at least 15 ms longer than the cycle time after turning ON the Forced Abort Bit before executing the next protocol macro.

In the following example, the Forced Abort Bit is turned ON and an interlock is created for the PMCR(––) instruction for 30 ms before the Forced Abort Bit is turned OFF.

Execution	Protocol Macro	Forced Abort
condition	Executing Flag	Bit

PMCR

Abort

condition T000

A

A

A

TIMH

000

#0003

T000

20711 Forced Abort Bit

Abort condition

A
T000
	30 ms	1 cycle
Forced Abort
Bit (IR 20711)
Protocol Macro
Executing Flag
(IR 20708)

95