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359
Flags
A50012:
The Step Flag is turned ON for one cycle when STEP(008) is executed and if
necessary it can be used to reset counters in steps as shown below.
(009)
SNXT 001000
(008)
STEP 001000
CNT
0001
#0003
0000
00
0001
00
A500
12
1 Cycle
A50012
01000
Start
00000
LD
000000
00001
SNXT(009)
001000
00002
STEP(008)
001000
00003
LD
000100
00004
LD
A50012
00005
CNT
001
#0003
Address Instruction
Operands
The following three examples demonstrate the three types of execution control
possible with step programming. Example 1 demonstrates sequential execu-
tion; Example 2, branching execution; and Example 3, parallel execution.
The following process requires that three processes, loading, part installation,
and inspection/discharge, be executed in sequence with each process being re-
set before continuing on the the next process. Various sensors (SW1, SW2,
SW3, and SW4) are positioned to signal when processes are to start and end.
SW 1
SW 2
SW 3
SW 4
Loading
Part installation
Inspection/discharge
Examples
Example 1:
Sequential Execution
STEP DEFINE and STEP START: STEP(008)/SNXT(009)
Section 5-29
Summary of Contents for CVM1D
Page 462: ...SYSMAC CVM1D Duplex System Programmable Controllers Operation Manual Revised August 2001...
Page 463: ...iv...
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