Omron C500-LDP01-V1, Руководство по эксплуатации

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Appendix D
Error and Arithmetic Flag Operation
The following table shows the instructions that affect the Error (ER), Carry (CY), Greater Than (GT), Equals
(EQ), and Less Than (LT) Flags. Vertical arrows in the table indicate the flags that are turned ON and OFF
according to the result of the instruction. Instructions not shown do not affect any of the flags in the table.
In general, ER indicates that operand data is not within requirements. CY indicates arithmetic or data shift re-
sults. GT indicates that a compared value is larger than some standard, LT that it is smaller, and EQ, that it is
the same. The status of these flags is maintained until another instruction that affects the flag is executed.
Although ladder diagram instructions, TIM, TIMH(15), CNT, and CNTR(12) are executed when ER is ON, oth-
er instructions with a vertical arrow under the ER column are not executed if ER is ON. All of the other flags in
the following table will also not operate when ER is ON.
The status of these flags cannot be monitored from the Programming Device, because the flags are turned
OFF when the END(01) instruction is executed.
Instructions 1303 (ER) 1304 (CY) 1305 (GR) 1306 (EQ) 1307 (LE)
TIM Unaffected Unaffected Unaffected Unaffected
CNT
END(01) OFF OFF OFF OFF OFF
CNTR(12) Unaffected Unaffected Unaffected Unaffected
TIMH(15)
CMP(20)
Unaffected
Unaffected
MOV(21) Unaffected Unaffected Unaffected Unaffected
MVN(22)
BIN(23) Unaffected Unaffected Unaffected
BCD(24)
ASL(25) Unaffected Unaffected Unaffected
ASR(26)
ROL(27)
ROR(28)
COM(29) Unaffected Unaffected Unaffected
Unaffected
ADD(30) Unaffected Unaffected
SUB(31)
ANDW(34) Unaffected Unaffected Unaffected
Unaffected
ORW(35)
XORW(36)
XNRW(37)
INC(38) Unaffected Unaffected Unaffected
DEC(39)
STC(40) Unaffected ON Unaffected Unaffected Unaffected
CLC(41) Unaffected OFF Unaffected Unaffected Unaffected
SLD(74) Unaffected Unaffected Unaffected Unaffected
SRD(75)
MLPX(76)
DMPX(77)