1
Spot Welding Application Using an Air Gun
1.6
Spot Gun Motion Control
1-42
1.6.7 Monitor Function for Spot Welding Equipment
Table 1-4: Function List
Function
Content
Signal
Condition
Method of Use
AIR PRESS LOW
Input Signal
When the air pressure is low and
this signal turns on, an alarm
occurs. The servo power stays
on. This function signal must be
set in the Concurrent I/O
Parameter.
Normal: OFF
(NO)
Signal Function
This signal can be used during the
low air pressure signal in the spot
input allocation display if the set
general-purpose input external
input is on.
To reset the alarm, turn the signal
off, and it will return to the alarm
reset operation.
TIMER COOL
WATER ERROR
GUN COOL WATER
ERROR
When the water cooling is low and
this signal turns on, an alarm
occurs. The servo power stays
on. This function signal must be
set in the Concurrent I/O
Parameter.
Normal: OFF
(NO)
Signal Function
This signal can be used during the
low water cooling signal in the spot
input allocation display if the set
general-purpose input external
input is on.
To reset the alarm, turn the signal
off, and it will return to the alarm
reset operation.
TRANSTHERMO
ERROR
When a gun transformer error
occurs, this input turns off and an
alarm occurs. The servo power
stays on. This function signal
must be set in the Concurrent I/O
Parameter.
Normal: ON
(NC)
Signal Function
Even though usually a timer error is
transmitted to the timer from the
gun, and the main signal is
transmitted from the gun
transformer, an alarm may occur.
Also if the pressure, full open
status, short open status signal,
etc. is transmitted from the robot
controller, the signal line from the
timer to the gun becomes a
transthermo error only. If this signal
is checked on the robot side, the
signal line transmitted to the timer
disappears, and the cable handling
is made easier.
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