X13
33
Label
36
P20
501
X17
723
726
(4) The special usages of the pointers other than P255 are shown below.
P251, P360 to P368: Label for starting PLC high-speed processing program.
P252, P370 to P378: Label for starting PLC main (ladder) processing program.
(Note 1) Do not omit the label of P252 and P370 to P378 even when there is only a PLC main
processing program.
(Note 2) P251, P252 and P360 to P378 cannot be used as CJ, JMP or CALL command devices.
(Note 3) Do not create a program in which the P** in the PLC high speed processing program is
jumped to from the PLC main processing program.
(Note 4) The P** used as a CJ, JMP or CALL command device must be programmed so that the **P
will be sure to exist as a label in the same file as the command.
The PLC will not operate correctly if Notes 1 to 4 are not observed.
5.3.14 Decimal Constant K
(1) The decimal constant can be used in the following ways.
(a) Timer counter setting value: Designate in the range of 1 to 32767.
(b) Pointer No.: 0 to 159
(c) Bit device digit designation: 1 to 8
(d) Basic command, function command, exclusive command value setting
· 16-bit command: -32768 to 32767
· 32-bit command: -2147483648 to 2147483647
(2) The decimal constant is stored in the BIN value (binary) in the PLC.
5.3.15 Hexadecimal Constant H
(1) The hexadecimal constant is used to designate the basic command, function command and
exclusive command values.
· 16-bit command: 0 to FFFF
· 32-bit command: 0 to FFFFFFFF
5. Explanation of Devices
5.3 Detailed Explanation of Devices
C J
C J
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Pointer
Jump to label
P20
P20 (step 501)
when X13 turns ON.
Jump to END when
P255
X17 turns ON.