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3M-Matic 800rf Case Sealer Theory of Operation
Copyright 1999, 3M IPC. All rights reserved. 5-5
Table 5-1. Sequence Table Random Mode (continued)
SEQUENCE RANDOM MODE PLC VALVE ACTION OUTPUT INPUT
IF T2 TIMED OUT PROGRAM GOES
TO STEP 6
STEP 6
UPPER PORT X V4 VENTED 10
UPPER HEAD BRAKES X (a) V1 UNLOCK 8
LOWER PORT X (a) V3 VENTED 9
SIDE DRIVE ASSEMBLY LOCKS LATCH V2 TURN ON 0
IF PADDLE SWITCH IS MADE PROGRAM GOES
TO STEP 7 10
STEP 7
PADDLE LATCH V7 MOVES UP 6
FORK UNLATCH V11 MOVES DOWN 7
START T3 (1.0 SEC) & T7 (1.5 SEC) NONE
START T11 (0.1 SEC) NONE
T11 TIMED OUT
T3 TIMED OUT
UPPER HEAD BRAKES LATCH V1 UNLOCK 8
T7 TIMED OUT
UPPER HEAD BRAKES UNLATCH V1 LOCK 8
START T8 (0.5 SEC)
IF PHOTOCELL PC2 IS BLOCKED PROGRAM GOES
OR NOT BLOCKED TO STEP 8
STEP 8
IF PHOTOCELL PC2 IS NOT
BLOCKED (SHORT BOX)
FOLDER ARM LATCH V9 MOVES DOWN 2
FOLDER ARM REED SWITCH
IS MADE 16
REAR FLAP FOLDER LATCH V10 MOVES DOWN 11
T8 TIMED OUT
SIDE DRIVE MOTORS LATCH TURN ON 1
IF PHOTOCELL PC2 IS BLOCKED
(LONG BOX)
SIDE DRIVE MOTORS LATCH TURN ON 1
PHOTOCELL PC2 IS CLEARED
FOLDER ARM LATCH V9 MOVES DOWN 2
FOLDER ARM REED SWITCH
IS MADE 16
REAR FLAP FOLDER LATCH V10 MOVES DOWN 11
(a) ONLY IF PHOTOCELL PC6 IS CLEAR.