3M 39800 5-8 Copyright 1999, 3M IPC. All rights reserved., Table 5-2. Sequence Table Fixed Mode (continued)

Theory of Operation 3M-Matic 800rf Case Sealer

SEQUENCE  FIXED MODE PLC VALVE ACTION OUTPUT INPUT

IF START BUTTON IS PUSHED PROGRAM GOES

TO STEP 1 1

STEP 1

START T23 (0.4 SEC.) NONE

T23 TIMED OUT

SIDE DRIVE ASSEMBLIES UNLATCH V6 MOVE OUT 5

FAST INFEED MOTOR (ROLLERS) LATCH TURN ON 12

INFEED GATE LATCH MOVES DOWN 3

SLOW INFEED MOTOR

(ROLLERS) LATCH TURN ON 3

FORK LATCH V11 MOVES UP 7

SIDE BELT DRIVE MOTORS L ATCH 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

PADDLE UNLATCH V7 MOVES DOWN 6

START T9 (0.6 SEC) NONE

FAST INFEEED MOTOR (ROLLERS) UNLATCH (b) TURN OFF −12

IF PHOTOCELL PC4 IS BLOCKED

AND T9 TIMED OUT (a) PROGRAM GOES

TO STEP 5 7

STEP 5

START T6 (0.0 SEC) NONE

T6 TIMED OUT

SIDE DRIVE MOTORS UNLATCH TURN OFF 1

START T2 (0.2 SEC) NONE

(a) ONLY IF PHOTOCELL PC6 IS CLEAR.

(b) ONLY IF PHOTOCELL PC4 IS BLOCKED.