Preface
MicroLogix 1000 Programmable Controllers User Manual
E–20
Rung 2:1
The SQC instruction and SQO instruction share the same Control
Register. This is acceptable due to the careful planning of the
rungstate condition. You could cascade (branch) many more SQO
instructions below the SQO if you desired, all using the same Control
Register (R6:0 in this case). Notice that we are only comparing Inputs
0–3 and are only asserting Outputs 0–3 (per our Mask value).
| R6:0 +SQC–––––––––––––––+ |
|––]/[––––––––––––––––––––––––––––+–––––––+SEQUENCER COMPARE +–(EN)–+–|
| FD | |File #N7:0+–(DN) | |
| | |Mask 000F+–(FD) | |
| | |Source I:0.0| | |
| | |Control R6:0| | |
| | |Length 9| | |
| | |Position 2| | |
| | +––––––––––––––––––+ | |
| | R6:0 +SQO–––––––––––––––+ | |
| +––]/[––+SEQUENCER OUTPUT +–(EN)–+ |
| FD |File #N7:10+–(DN) |
| |Mask 000F| |
| |Dest O:0.0| |
| |Control R6:0| |
| |Length 9| |
| |Position 2| |
| +––––––––––––––––––+ |
Rung 2.2
| |
|–––––––––––––––––––––––––––––––––––––+END+–––––––––––––––––––––––––––|
| |
The following displays the FILE DATA for both sequencers. The SQC
compare data starts at N7:0 and ends at N7:9. While the SQO output
data starts at N7:10 and ends at N7:19. Please note that step 0 of the
SQO is never active. The reset rung combined with the rung logic of
sequencers guarantees that the sequencers always start at step 1. Both
sequencers also ”roll over” to step 1. ”Roll Over” to step 1 is
integral to all sequencer instructions.
SQC Compare Data
Addresses Data (Radix=Decimal)
N7:0 0 1 2 3 4 5 6 7 8 9
N7:10 0 0 1 2 3 4 5 6 7 8
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive
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