Atlas Copco PowerMACS 4000, User Manual

Page: 246 / 668

PLC
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BOLTCTRL2_BOLTSEL[3] = 0
BOLTCTRL2_BOLTSEL[4] = 0
Then order the station to remove the last result stored for the selected bolts by changing
BOLTCTRL2_CMD from 0 to 1.
Wait for BOLTCTRL2_STS to become 0 (idle OK). This indicates that the station has completed
the drop command.
4. To loose and retighten only the failing bolts the OK bolts must be inhibited. Therefore set up
BOLTCONTROL as below:
BOLTCONTROL[1] = 0 (* Connected normally *)
BOLTCONTROL[2] = 0 (* Connected normally *)
BOLTCONTROL[3] = 3 (* Do not run *)
BOLTCONTROL[4] = 3 (* Do not run *)
5. Loose the bolts by setting MODE to 2 and start the cycle. Wait for the cycle to be completed.
6. Remove the result of the loosening cycle by repeating step 3 above.
7. Retighten bolt "B1" and "B2" again using MODE 1 and starting the cycle. Wait for the cycle to be
completed.
8. Given that the complete tightening now is considered done, either since the retightening of bolt
"B1" and "B2" ended OK, or that no more attempts are allowed, releases the produced cycle data
by setting DATAHOLD to FALSE.
The cycle data produced using the above sequence will the be:
Time: 2005-07-08 13:00:00
Status: OK
Bolt: B3 Program: Tighten Status: OK
Bolt: B4 Program: Tighten Status: OK
Bolt: B1 Program: Tighten Status: OK
(the result from the retightening)
Bolt: B2 Program: Tighten Status: OK
(the result from the retightening)
while the same operations without using the BOLTCTRL2 bolt data drop function would be:
Time: 2003-07-08 13:00:00
Status: NOK
Bolt: B1 Program: Tighten Status: NOK
(the result from the first tightening)
Bolt: B2 Program: Tighten Status: NOK
(the result from the first tightening)
Bolt: B3 Program: Tighten Status: OK
Bolt: B4 Program: Tighten Status: OK
Bolt: B1 Program: Loosen Status: OK
(the result from the loosening)
Bolt: B2 Program: Loosen Status: OK
(the result from the loosening)
Bolt: B1 Program: Tighten Status: OK
(the result from the retightening)
Bolt: B2 Program: Tighten Status: OK
(the result from the retightening)