Unitec Peco HF25A, Руководство пользователя

Страница: 74 / 177

CHAPTER 5. MAINTENANCE
HF25D DC RESISTANCE WELDING SYSTEM
5-4 990-333
Alarm Message Description Corrective Action
CURRENT 1
GREATER THAN
UPPER LIMIT Actual weld current is greater than the
user set Upper Limit value for Weld1. Reset the Upper Limit for Weld1 to a larger
value.
CURRENT 2
GREATER THAN
UPPER LIMIT Actual weld current is greater than the
user set Upper Limit value for Weld2. Reset the Upper Limit for Weld2 to a larger
value.
CURRENT 1
LOWER THAN
LOWER LIMIT Actual weld current is less than the user
set Lower Limit value for Weld1. Weld splash can cause the actual weld current to
drop below the user set Lower Limit for Weld1.
Add upslope to reduce weld splash.
Reset the lower Limit for Weld1 to a smaller
value.
CURRENT 2
LOWER THAN
LOWER LIMIT Actual weld current is less than the user
set Lower Limit value for Weld2. Weld splash can cause the actual weld current to
drop below the user set Lower Limit for Weld2.
Add upslope to reduce weld splash.
Reset the lower Limit for Weld2 to a smaller
value.
EMERGENCY STOP
- OPERATOR
ACTIVATED The Operator Emergency Stop switch
has been activated. All power to the
HF25/26 is immediately terminated. Remove any unsafe operating conditions at the
welding electrodes.
Reset the Operator Emergency Stop switch.
Turn off power to the HF25/26, then turn it on
again
CHECK VOLTAGE
CABLE No electrode voltage measurement was
made. Verity that the Voltage Sense Cable is properly
connected to the electrodes or electrode holder.
NOTE: Polarity is not important for the cable
connection.
CURRENT 1
GREATER THAN
UPPER LIMIT Actual weld current is greater than the
user set Upper Limit value for Weld1. Reset the Upper Limit for Weld1 to a larger
value.
ENERGY SETTING
TOO SMALL While in the voltage or power feedback
mode, the HF25/26 could not control the
energy setting because the required
current was smaller than the minimum
current specified. Increase the energy setting.
FIRING SWITCH
BEFORE FOOT
SWITCH The Firing Switch input has been
activated before the Foot Switch has
been activated, preventing weld current
from flowing. Check the weld head for an improperly adjusted
firing switch.
Automation Only - Check the timing on the PLC
control lines to the Firing Switch and Foot
Switch inputs.