YASKAWA DX200 - Spot Welding

Description of Units and Circuit Boards
8 - 96
8.29.4 Spot welding
Logical num-
ber
Input name / Function
20022 WELDING ON/OFF (from sequencer)
This signal inputs the welding ON/OFF selector switch status from the
sequencer in the interlock unit. The WELD ON/OFF signal is output to
the Power Source according to this signal and the robot status.
20023 WELDING PAUSE (from sequencer)
This signal is used to move the robot to the home position when an er-
ror occurs in the Power Source or the gun.
The robot ignores the spot welding instruction and operates playback
motion.
20024 INTERFERENCE 3 ENTRANCE PROHIBITED
If the robot attempts to enter cube 3
2
while this signal is ON, the robot
is put into wait status (with servo power ON). During wait status, robot
movement is started as soon as this signal turns OFF.
20025 INTERFERENCE 4 ENTRANCE PROHIBITED
If the robot attempts to enter cube 4
2
while this signal is ON, the robot
is put into wait status (with servo power ON). During wait status, robot
movement is started as soon as this signal turns OFF.
20050
1
TIMER COOLING WATER ERROR
This signal monitors the status of timer cooling water. The robot dis-
plays alarm and stops when this signal is input. The SERVO power sup-
ply remains ON.
20051
1
GUN COOLING WATER ERROR
This signal monitors the status of gun cooling water. The robot displays
alarm and stops when this signal is input. The SERVO power supply re-
mains ON.
20052
1
TRANSTHERMO ERROR
Error signal is sent from the transformer in the gun to the robot. The sig-
nal is normally an ON (NC) signal. An alarm occurs when the signal is
OFF. The SERVO power supply remains ON.
20053
1
LOW AIR PRESSURE
When air pressure is reduced and this input is turned ON, an alarm oc-
curs. The SERVO power supply remains ON.
WELD COMPLETION
This signal indicates that the Power Source completed welding without
error. This signal is used as a confirmation signal for welding instruction
execution and manual spot welding.
After this signal is input, the welding sequence is completed and the
next step is executed when confirmation limit switch is not provided.
WELDING ERROR
This signal indicates an abnormal welding result or Power Source’s er-
ror. Alarm occurs and the manipulator stops if this signal is input during
welding.