Filter
Top Products
5. Explanation of Devices
5.3 Detailed Explanation of Devices
- 78 -
33
36
P20
501
723
726
X13
X17
Label
Pointer
CJ P20
P255CJ
Jump to label
P20 (step 501)
when X13 turns ON.
Jump to END when
X17 turns ON.
(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