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start either process A or process B. Both of the steps for these processes
end with a SNXT(09) that starts the step for process C.
SNXT(09) HR 0001
00002 (SW B2)
STEP(08) HR 0000
SNXT(09) HR 0002
STEP(08) HR 0001
SNXT(09) HR 0002
STEP(08) HR 0002
SNXT(09) HR 0003
STEP(08)
Programming for process A
Programming for process B
Programming for process C
00003 (SW A2)
00004 (SW B2)
00005 (SW D)
Process A started.
Process A reset.
Process C started.
Process B reset.
Process C started.
Process C reset.
00001 (SW A1)
SNXT(09) HR 0000
00002 (SW B2)
00001 (SW A1)
Address
Instruction
Operands
Address
Instruction
Operands
00000
LD
00001
00001
AND NOT
00002
00002
SNXT(09)
HR
0000
00003
LD NOT
00001
00004
AND
00002
00005
SNXT(09)
HR
0001
00006
STEP(08)
HR
0000
Process A
00100
LD
00003
00101
SNXT(09)
HR
0002
00102
STEP(08)
HR
0001
Process B
00100
LD
00004
00101
SNXT(09)
HR
0002
00102
STEP(08)
HR
0002
Process C
00200
LD
00005
00201
SNXT(09)
HR
0003
00202
STEP(08)
---
Note
Using HR 0002 as the operand in two SNXT(09) instructions is not consid-
ered duplicate use of the bit and an error will not occur in the program check.
Step Instructions
Section 5-22