Allen-Bradley ClutchBrake PLC-5 Series - Functional Block Diagram; Modes of Control System Operation

1–7Overview of the Clutch/Brake Control System
Publication 65566.5.1 - October 1996
The functional block diagram in Figure 1.5 shows the relationships
between various mechanical components of a stamping press and the
control system.
Figure 1.5
Functional
Block Diagram
Device
to Monitor
Stroke Position
Device
to Monitor
Stroke Position
Air Supply
Stroke
Position
Input
Signals to/from
Main Solenoid Valves
Master
Station
Run
Station 1
Run
Station 2
Run
Station 3
Run
Station 4
PLC5/46 Processor
in Chassis A
PLC5/26 Processor
in Chassis B
Clutch/Brake
Assembly
Stroke
Position
Input
122451
Crankshaft at Top Position
Crankshaft at Bottom Position
Flywheel
Press
Air to clutch
Main Solenoid Valves
Flywheeldriven
Crankshaft
You select the mode of control system operation with a selector switch.
In accordance with ANSI B11.1 Section 4.12.4.1, the means of selecting
the operational mode must be capable of being fixed by a supervisor.
Typically, this is interpreted as to mean a keyswitch.
This Mode Lets you:
Off Disable operation of the clutch/brake control system when not in operation
Inch Move the press up or down to the desired position with Inch pushbuttons
(or by ladder logic) to set up dies and tooling (not intended for production)
Microinch Same as Inch but at a slower speed. Requires a separate drive assembly
and operates from a separate set of outputs
Single Cycle the press through a single uninterrupted stroke (from top to bottom
to top) with RUN buttons, with or without onthehop
Continuous Run the press with uninterrupted stroking for production operation
Remote Select Inch, Microinch, Single, Auto Single, or Continuous mode, remotely
Simulate inch and run buttons, and arm for continuous on demand
Die Change Run die change, only
Functional Block Diagram
Modes of
Control System operation