FFXI Haven - Ваш Источник #1.

follows, -there is a single button in the garage, and a single button remote control. -when the button is pushed the door will move up or down. -if the button is pushed once while moving, the door will stop, a second push will

start motion again in the opposite direction. -there are top/bottom limit switches to stop the motion of the door. -there is a light beam across the bottom of the door. If the beam is cut while the

door is closing the door will stop and reverse. -there is a garage light that will be on for 5 minutes after the door opens or closes.

plc sfc -20.18

20.5 PRACTICE PROBLEM SOLUTIONS

1.
start
start button #1 start button #2
press #1 adv. press #2 adv.
bottom limit switch #1 bottom limit switch #2
press #1 retract press #2 retract
top limit switch #1 top limit switch #2
press #1 off press #2 off

plc sfc -20.19

2.
Start
EW crosswalk button NO EW crosswalk button
red NS, green EW red NS, green EW
walk light on for 10s
24s delay 16s delay
red NS, yellow EW
4s delay
EW crosswalk button NO EW crosswalk button
red NS, green EW red NS, green EW
walk light on for 10s
24s delay 16s delay
red NS, yellow EW
4s delay

plc sfc -20.20

3.

plc sfc -20.21

4.
step 1
step 2
T1
button + remote
step 3 close door
T3 T2 button + remote + bottom limit
light beam
step 4
T4
button + remote
step 5 open door
T5
button + remote + top limit

plc sfc -20.22 plc sfc -20.23 plc sfc -20.24 plc sfc -20.25

1.

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