19.1 Common precautions
The FP7 series differs from the existing FP series in the following points:
■
Operations of the carry flag and comparison flags (●: Change, -: Do not change)
Type of
instruction
Mnemoni
c
Name of instruction
System relay number
Carry flag
Comparison flags
SR9(CY)
SRA (>)
SRB (=)
SRC(<)
Data
comparison
instructions
CMP
Data compare
-
●
●
●
WIN
Band compare
-
●
●
●
BCMP
Block comparison
-
-
●
-
Bit comparison
instructions
BTT
16-bit data specified bit test
-
-
●
-
STC
Carry-flag set
●
-
-
-
CLC
Carry-flag reset
●
-
-
-
String
operation
instructions
ACHK
ASCII data check
-
-
●
-
SCMP
String compare
-
●
●
●
● When operation is executed, the carry flag SR9 (CY) and comparison flags SRA (>), SRB
(=), and SRC (<) are respectively activated by the instructions listed above.
● The flags do not change even if the operation result is "0" in the case of overflow or
underflow with instructions other than listed above.
■
Operation at the time of overflow and underflow
● The carry flag SR9 (CY) does not change even in the case of overflow or underflow.
● Note that overflow or underflow may result if incorrect operation unit is specified.
■
Error flag
● Operation error flags are not cleared even in the case of normal operation.
● Use ERR instruction for clearing error flags.
■
Operation device areas
● When the operation unit is 32 bits (UL, SL, SF) or 64 bits (DF), if an area near the end of an
operation device is specified, the device memory with a consecutive address within PLC is
overwritten. Specify an operand so that areas are not incorrectly read or written.
Example) When a transfer instruction is used, and the operation unit is specified as
32 bits, if WY511 is selected for the transfer instruction [D], the starting area of WL0
is overwritten.
19.1 Common precautions
19-2
WUME-FP7CPUPGR-12
Содержание FP7 Series
Страница 2: ... MEMO 2 WUME FP7CPUPGR 12 ...
Страница 18: ... MEMO xviii WUME FP7CPUPGR 12 ...
Страница 52: ... MEMO 1 34 WUME FP7CPUPGR 12 ...
Страница 61: ...Example 2 Use PSHS RDS or POPS instruction 2 1 Structure of Instructions WUME FP7CPUPGR 12 2 9 ...
Страница 104: ... MEMO 2 52 WUME FP7CPUPGR 12 ...
Страница 123: ...3 9 ANS AND stack WUME FP7CPUPGR 12 3 19 ...
Страница 125: ...3 10 ORS OR Stack WUME FP7CPUPGR 12 3 21 ...
Страница 129: ...3 11 PSHS Push stack RDS Read stack POPS Pop stack WUME FP7CPUPGR 12 3 25 ...
Страница 139: ...4 CNDE instruction 5 Step ladder instructions 6 Subroutine instructions 3 16 ALT Alternate out WUME FP7CPUPGR 12 3 35 ...
Страница 146: ... Application example of timer instructions serial connection of timers 3 17 TM Timer 3 42 WUME FP7CPUPGR 12 ...
Страница 147: ... Application example of timer instructions parallel connection of timers 3 17 TM Timer WUME FP7CPUPGR 12 3 43 ...
Страница 190: ...3 26 JP LBL Jump Label 3 86 WUME FP7CPUPGR 12 ...
Страница 239: ...Name Description SR8 ER 3 46 ST ST ST ST ST ST Data Comparison Start WUME FP7CPUPGR 12 3 135 ...
Страница 246: ... MEMO 3 142 WUME FP7CPUPGR 12 ...
Страница 251: ...Name Description SRA Depending on the comparison result SRB SRC 4 1 CMP Data Compare WUME FP7CPUPGR 12 4 5 ...
Страница 258: ... MEMO 4 12 WUME FP7CPUPGR 12 ...
Страница 277: ...F E D C B A 9 8 7 6 5 4 3 2 1 0 Digit 3 Digit 2 Digit 1 Digit 0 bit 5 8 DGT Digit Data Transfer WUME FP7CPUPGR 12 5 19 ...
Страница 304: ... MEMO 5 46 WUME FP7CPUPGR 12 ...
Страница 321: ...Name Description ER 6 7 DIVFP2 Division FP2 Compatible WUME FP7CPUPGR 12 6 17 ...
Страница 348: ... MEMO 6 44 WUME FP7CPUPGR 12 ...
Страница 388: ... MEMO 7 40 WUME FP7CPUPGR 12 ...
Страница 438: ... MEMO 8 50 WUME FP7CPUPGR 12 ...
Страница 450: ... MEMO 9 12 WUME FP7CPUPGR 12 ...
Страница 520: ... MEMO 10 70 WUME FP7CPUPGR 12 ...
Страница 602: ... MEMO 11 82 WUME FP7CPUPGR 12 ...
Страница 622: ... MEMO 12 20 WUME FP7CPUPGR 12 ...
Страница 650: ... MEMO 13 28 WUME FP7CPUPGR 12 ...
Страница 1160: ... MEMO 18 66 WUME FP7CPUPGR 12 ...
Страница 1188: ... MEMO 19 28 WUME FP7CPUPGR 12 ...
Страница 1211: ...20 4 ASCII Code Table JIS8 Code Table Reference Table ASCII Codes 20 4 ASCII Code Table JIS8 Code Table WUME FP7CPUPGR 12 20 23 ...
Страница 1220: ... MEMO WUME FP7CPUPGR 12 ...
Страница 1221: ... MEMO WUME FP7CPUPGR 12 ...