40
Instruction 1
0002
0000
Instruction 2
Diagram B: Corrected with a Jump
0001
JME(05)
JMP(04)
Execution of programs containing multiple Jump instructions for one Jump
End instruction resembles that of similar interlocked sections. The following
diagram is the same as that used for the interlock example above, except
redrawn with jumps. This diagram, however, would not execution the same,
as has already be described, i.e., interlocks would reset certain parts of the
interlocked section but jumps would not affect any status between the Jump
and Jump End instructions.
Instruction 1
0000
Instruction 2
0001
JME(05) 00
JMP(04) 00
0004
Instruction 3
Instruction 4
0006
0005
0003
0002
JMP(04) 00
Jump diagrams can also be drawn as branching instruction lines if desired
and would look exactly like their interlock equivalents. The non-branching
form, which is the form displayed on the GPC, will be used in this manual.
4–4 Controlling Bit Status
There are five instructions that can be used generally to control individual bit
status. These are the Output or OUT, Output NOT or OUT NOT, Differentiate
Up, Differentiate Down, and Keep instructions. All of these instruction appear
as the last instruction in an instruction line and take a bit address for an oper-
and. Although details are provided in
5–6 Bit Control Instructions
, these in-
structions are described here because of their importance in most programs.
Although these instructions are used to turn ON and OFF output bits in the IR
area (i.e., to send or stop output signals to external devices), they are also
used to control the status of other bits in the IR area or in other data areas.
4–4–1 OUT and OUT NOT
The OUT and OUT NOT instructions are used to control the status of the
designated operand bit according to the execution condition. With the OUT
instruction, the operand bit will be turned ON as long as the execution condi-
Controlling Bit Status Section 4–4
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