Controlling Bit Status - Omron SYSMAC CV Series Operation Manual

Controlling Bit Status

0000
00
0000
01
0000
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0000 0000
03 04
0000
05
0000
06
! Caution
JUMP 0000
4-7

Controlling Bit Status

The same jump number cannot be used in more than one JUMP END instruc-
tion. If you include more than one JUMP END instruction with the same jump
number, all JUMP instructions with that jump number will jump to the first JUMP
END instruction in the program with the same jump number. An exception to this
is when jump number 0000 is set for multiple usage in the PC Setup (see follow-
ing explanation and page 499). The same jump number can be used in more
than one JUMP instruction to jump to the same destination in the program. The
following example illustrates a program with two jumps to the same destination.
Because instructions are not examined when jumps are made in the program,
differentiated outputs can remain ON for more than one cycle if programmed
within the area of the program that is jumped.
The PC Setup can be used to control the operation of jumps created using jump
number 0000. If multiple jumps with 0000 are disabled, jumps created with 0000
will operate as described above. If multiple jumps are enabled, any JMP 0000
instruction will jump to the next JME 0000 in the program (and not the first
JME 0000 in the program). When multiple jumps for 0000 are enabled, you can-
not overlap or nest the jumps, i.e., each JMP 0000 must be followed by a
JME 0000 before the next JMP 0000 in the program and each JME 0000 must
be followed by a JMP 0000 before the next JME 0000 in the program.
Note Version-2 CVM1 CPUs also support the CJP(221) and CJPN(222) jump instruc-
tions that can also be used to create jumps in programs. Refer to Section 5
Instruction Set for details.
There are instructions that can be used generally to control individual bit status.
These include the OUTPUT, OUTPUT NOT, DIFFERENTIATE UP, DIFFER-
ENTIATE DOWN, SET, RESET and KEEP instructions. All of these instructions
appear as the rightmost instruction in an instruction line and take a bit address
for an operand. Although details are provided in 5-7 Bit Control Instructions ,
these instructions (except for OUTPUT and OUTPUT NOT, which have already
been introduced) are described here because of their importance in most pro-
grams. Although these instructions are used to turn ON and OFF output bits in
the I/O Memory (i.e., to send or stop output signals to external devices), they are
also used to control the status of other bits in the I/O memory or in other data
areas.
Address Instruction
(004)
JMP #0001
00000
00001
Instruction 1
00002
00003
(004)
JMP #0001 00004
00005
00006
Instruction 2
00007
00008
Instruction 3
00009
00010
Instruction 4
00011
00012
(005)
JME #0001
00013
Section 4-7
Operands
LD 000000
JMP(004) #0001
LD 000001
Instruction 1
LD 000002
JMP(004) #0001
LD 000003
AND NOT 000004
Instruction 2
LD 000005
Instruction 3
LD 000006
Instruction 4
JME(005) #0001
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