Task Instruction Limitations - Omron CJ - PROGRAMMING MANUAL 12-2009 Programming Manual

Using Tasks
4-2-2

Task Instruction Limitations

Instructions Required in the Same Task
Instructions Not Allowed in Interrupt Tasks
The following instructions must be placed within the same task. Any attempt
to split instructions between two tasks will cause the ER Flag to turn ON and
the instructions will not be executed.
Mnemonic
JMP/JME
CJP/JME
CJPN/JME
JMP0/JME0
FOR/NEXT
IL/ILC
SBS/SBN/RET
MCRO/SBN/RET
BPRG/BEND
STEP/STEP
The following instructions cannot be placed in interrupt tasks. Any attempt to
execute one of these instructions in an interrupt task will cause the ER Flag to
turn ON and the instruction will not be executed. The following instructions
can be used if an interrupt task is being used as an extra task.
Mnemonic
TKON(820)
TKOF(821)
STEP
SNXT
STUP
DI
EI
The operation of the following instructions is unpredictable in an interrupt task:
HUNDRED-MS TIMER: TIM and TIMX(550), TEN-MS TIMER: TIMH(015)
and TIMHX(551), ONE-MS TIMER: TMHH(540) and TMHHX(552), TENTH-
MS TIMER: TIMU(541) and TIMUX(556) (See note.), HUNDREDTH-MS
TIMER TIMUH(544) and TIMUHX(557) (See note.), ACCUMULATIVE TIMER:
TTIM(087) and TTIMX(555), MULTIPLE OUTPUT TIMER: MTIM(543) and
MTIMX(554), LONG TIMER: TIML(542) and TIMLX(553), TIMER WAIT:
TIMW(813) and TIMWX(816), HIGH-SPEED TIMER WAIT: TMHW(815) and
TMHWX(817), PID CONTROL: PID(190), FAILURE POINT DETECTION:
FPD(269), and CHANGE SERIAL PORT SETUP: STUP(237).
Note These instructions are supported by the CJ1-H-R CPU Units only.
The following instructions cannot be used in the power OFF interrupt task
(they will not be executed even if they are used and the Error Flag will not turn
ON):
READ DATA FILE: FREAD(700), WRITE DATA FILE: FWRIT(701), WRITE
TEXT FILE(TWRIT(704)), NETWORK SEND: SEND(090), NETWORK
RECEIVE: RECV(098), DELIVER COMMAND: CMND(490), TRANSMIT:
Instruction
JUMP/JUMP END
CONDITIONAL JUMP/JUMP END
CONDITIONAL JUMP NOT/CONDITIONAL JUMP END
MULTIPLE JUMP/JUMP END
FOR/NEXT
INTERLOCK/INTERLOCK CLEAR
SUBROUTINE CALL/SUBROUTINE ENTRY/SUBROUTINE
RETURN
Note: If the global subroutine instructions (GSBS(750),
GSBN(751), and GRET(752)) are used, the subroutine
can also be called from another task.
MACRO/SUBROUTINE ENTRY/SUBROUTINE RETURN
BLOCK PROGRAM BEGIN/BLOCK PROGRAM END
STEP DEFINE
TASK ON
TASK OFF
STEP DEFINE
STEP NEXT
CHANGE SERIAL PORT SETUP
DISABLE INTERRUPT
ENABLE INTERRUPT
Section 4-2
Instruction
177