Tweco WC 1 Weld Sequence Controlle - Manual (Page 11)

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4.0 USER INTERFACE
4.1 Remote Control Interface Specification
The WC 1 Controller provides a remote control interface that allows the user to connect an external
PLC or robotic control to the WC 1. The interface provides remote schedule select, cycle start and
operational status indication. The WC 1 inputs are configured to operate from a 24 VDC power
source. The inputs can be configured for Pull-Up (Sourcing) or Pull Down (Sinking). A 24 VDC @
200MA isolated power supply (TB5) is provided to allow dry contact closures to activate the WC 1
inputs. All Relay Outputs are opto-isolated solid-state relays and will switch AC/DC loads up to 120
VAC at 1 amp.
4.2 Remote Pendant Interface
A 9 pin CPC circular connector is provided to allow the use of a manual operator control pendant.
The Optional Operator Pendant is designed to connect to this Operator Control connector and will
perform the following Control functions:
•
ESTOP – Palm button provides emergency stop input to the weld control.
•
CYCLE ON – Toggle switch to start and stop a weld cycle.
•
INC CURRENT – Pushbutton switch used to increase the Run current during a weld cycle.
The control will provide user defined limits for current change.
•
DEC CURRENT – Pushbutton switch used to Decrease the Run current during a weld
cycle. The control will provide user defined limits for current change.
•
READY – Green LED Indicator.
•
CYCLE ON – Red LED Indicator.
•
CYCLE COMPLETE – Green LED Indicator.
4.3 Optional Operator Pendant
The Operator Control Pendant is a NEMA 1 rated clamshell enclosure with a 15 ft control cable and
Remote I/O plug. If the WC 1 controller is to be used in a robotic or PLC based application the
remote pendant option is disabled and the inputs must be reconfigured for the desired remote
PLC/Robotic control functions.
4.4 RS-232 Serial Port
All weld schedule programming can be performed off-line via a RS-232 serial port or using the
internal display and program buttons. The Internal display allows the user to program all of the WC 1
Plasma Weld sequence parameters and to configure the controller operational modes. It can also
be used to Save and Load internal weld schedules.
4.5 Automated User Interface
The WC 1 controller allows full remote control capabilities for use with PLC or robotic controllers.
The control provides a 24-vdc interface that allows the users to select weld schedules and to
start/Stop the welding sequence. The controller provides a simple hand shaking output that allows