
B-63494EN/02 10.SAMPLE SYSTEM CONFIGURATION
- 175 -
Operating principle
- When one protective door is used
The table below indicates the states of each component.
States of each component
Guard Guard lock SW1 SW2 SW3 RY1 RY2 RY3 SGD
1
CLOSE LOCKED CLOSE CLOSE CLOSE ON ON OFF 1
2
CLOSE UNLOCKED CLOSE CLOSE OPEN OFF ON OFF 0
3
OPEN UNLOCKED OPEN OPEN OPEN OFF OFF ON 0
If the closed protective door is opened then is closed when the safety
relay contact has not melted, transitions are made from 1 to 2 to 3 to 2
to 1.
RY3 detects the melted contacts of RY1 and RY2, and turns off SGD
input if an error is detected.
- When one protection area uses two protective doors
The configuration of this example is such that a limit switch for guard
monitoring is added to the example for using one protective door.
The guard state monitor switches for two limit switches for guard
monitoring are connected in series. When even one guard is opened,
SGD is set to 0, assuming that the guard is open.
To release each of the two guard lock switches independently, two
signals are output from the I/O Link I/O UNIT. With these signals,
SGD is set to 0, assuming that the guard is open, when even one guard
lock is unlocked.
The table below indicates the states of each component.
States of each component
Guard 1 Guard lock 1 Guard
2
Guard lock 2 SW1 SW12 SW13 SW21 SW22 SW23 RY1 RY2 RY3 SGD
1
CLOSE LOCKED
CLOSE
LOCKED CLOSE CLOSE CLOSE CLOSE CLOSE CLOSE ON ON OFF 1
2
CLOSE UNLOCKED
CLOSE
LOCKED CLOSE CLOSE
OPEN
CLOSE CLOSE CLOSE OFF ON OFF
0
3
OPEN UNLOCKED
CLOSE
LOCKED
OPEN OPEN OPEN
CLOSE CLOSE CLOSE OFF OFF ON
0
4
CLOSE LOCKED
CLOSE
UNLOCKED CLOSE CLOSE CLOSE CLOSE CLOSE
OPEN
OFF ON OFF
0
5
CLOSE UNLOCKED
CLOSE
UNLOCKED CLOSE CLOSE
OPEN
CLOSE CLOSE
OPEN
OFF ON OFF
0
6
OPEN UNLOCKED
CLOSE
UNLOCKED
OPEN OPEN OPEN
CLOSE CLOSE
OPEN
OFF OFF ON
0
7
CLOSED LOCKED OPEN UNLOCKED CLOSE CLOSE CLOSE
OPEN OPEN OPEN
OFF OFF ON
0
8
CLOSED UNLOCKED OPEN UNLOCKED CLOSE CLOSE
OPEN OPEN OPEN OPEN
OFF OFF ON
0
9
OPEN UNLOCKED OPEN UNLOCKED
OPEN OPEN OPEN OPEN OPEN OPEN
OFF OFF ON
0
If guard 2 is opened then is closed with guard 1 closed when the safety
relay contact has not melted, for example, transitions are made from 1
to 4 to 7 to 4 to 1.
As in a case where one protective door is used, RY3 detects the
melted contacts of RY1 and RY2, and turns off SGD input if an error
is detected.
Notes
This example does not use the guard lock state signal (GDL). If GDL
is not used, as in this example, tie [G191#5] and [DI+001#5] to 1.