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Chapter 5 Instruction Specifications
5-105
Item number Control instructions-5 Name Label
Ladder format Condition code
Processing time (µs)
Remark
R7F4 R7F3 R7F2 R7F1 R7F0
Average Maximum
LBL n DER ERR SD V C
zzzzz
Instruction format Number of steps
0.5
Condition Steps
LBL n 1
Bit Word Double word
Usable I/O
XY
R,
M
TD, SS,
CU, CT WX WY
WR,
WM TC DX DY
DR,
DM
Constant
Other
n Code number { 0 to 255 (Decimal)
Function
• This instruction indicates the destination of the jump when the JMP n or CJMP n instruction is executed (n is always used in
pairs).
• The n in the LBL n cannot be used multiple times in the same program.
• This instruction itself does not perform any operation.
• Even if a startup condition is used with LBL n, it will be ignored.
Notes
• This instruction is checked prior to execution, and when there is an error, the following error code is set in the special
internal output WRF001. Also, the CPU error code '34' is set to special internal output WRF000.
CPU error code Special internal output Error code Error description
34 WRF001 H0001 Duplicate definition of LBL
Instruction for use
R100
(00001)
(00002)
(00003)
JMP 0
WR0000 = WR0000 + 1
LBL 0
R100
(00004)
(00005)
(00006)
WR0000 = WR0000 - 1
LBL 1
JMP 1
• When R100 is on, JMP 0 will be executed but JMP 1 will not be executed.
Therefore, the content of WR0000 will decrement by one during each scan.
• When R100 is off, JMP 0 will not be executed but JMP 1 will be executed.
Therefore, the content of WR0000 will increment by one during each scan.
LBL n