Theory of Operation 3M-Matic 800rf Case Sealer
5-4 Copyright 1999, 3M IPC. All rights reserved.Table 5-1. Sequence Table Random Mode (continued)
SEQUENCE RANDOM MODE PLC VALVE ACTION OUTPUT INPUT
IF START BUTTON IS PUSHED PROGRAM GOES
TO STEP 1 1
STEP 1
FAST INFEED MOTOR (ROLLERS) LATCH TURN ON 12
INFEED GATE LATCH (a) MOVES DOWN 3
SLOW INFEED MOTOR
(ROLLERS) LATCH (a) TURN ON 3
FORK LATCH V11 MOVES UP 7
SIDE BELT DRIVE MOTORS LATCH TURN ON 1
IF PHOTOCELL PC1 IS BLOCKED PROGRAM GOES
TO STEP 2 4
STEP 2
IF PHOTOCELL PC1 IS CLEARED PROGRAM GOES
TO STEP 3 4
STEP 3
INFEED GATE UNLATCH V8 MOVES UP 3
SLOW INFEED MOTOR
(ROLLERS) UNLATCH TURN OFF 3
CENTERING RAILS LATCH V5 MOVE IN 4
START T1 (0.8 SEC)
T1 TIMED OUT
CENTERING RAILS UNLATCH V5 MOVE OUT 4
IF PHOTOCELL PC3 IS BLOCKED PROGRAM GOES
TO STEP 4 6
STEP 4
SIDE DRIVE ASSEMBLIES LATCH V6 MOVE IN 5
BOX COUNTER LATCH COUNT UP 1 5
UPPER PORT X V4 VENTED 10
FASST INFEED MOTOR (ROLLERS) UNLATCH (b) TURN OFF −12
IF PHOTOCELL PC4 IS BLOCKED PROGRAM GOES
TO STEP 5 7
STEP 5
START T6 (0.0 SEC) NONE
T6 TIMED OUT
SIDE DRIVE MOTORS UNLATCH TURN OFF 1
UPPER PORT X V4 VENTED 10
LOWER PORT X (a) V3 VENTED 9
START T2 (0.2 SEC) NONE
(a) ONLY IF PHOTOCELL PC6 IS CLEAR.
(b) ONLY IF PHOTOCELL PC4 IS BLOCKED.