System Inputs/Outputs; Figure 2.6 Base, Showing Start Switches And Base Cable - Emerson Branson 2000 Series Instruction Manual

100-214-251 IWoper.book Page 29 Friday, June 16, 2017 4:12 PM
2.7

System Inputs/Outputs

The inputs provided to the welder are used to control the weld cycle and monitor the
2000IW/IW+ hardware.
2.7.1 START SWITCHES/START Signal - START Connector
These inputs are used to start the weld cycle. To start a weld cycle, both START SWITCH
inputs must become active within 100 (IW) or 200 (IW+) ms of each other, and remain
active until TRS activates, or an error will be generated and no weld will be performed
Errors will also be generated if the START SWITCHES do not remain active until the TRS
input becomes active (for maintained software), or are not inactive within 4 seconds after
the solenoid valve drive circuits have been disabled

Figure 2.6 Base, Showing START SWITCHES and Base Cable

2.7.2 EXTERNAL RESET - ALARM (User I/O) Connector
This input, when activated, will simulate pressing RESET (refer to Figure 2.4 Front Panel
Displays, callout 5, IW, 7 IW+). You cannot start a weld cycle if the EXTERNAL RESET line
is active.
2.7.3 READY Signal - ALARM Connector
The welder uses the Upper Limit Switch (ULS) input to determine when the carriage has
started to descend and when it has reached its "home" position on its return at the end of
the weld cycle.
The Controller evaluates other system conditions as well before generating the READY
signal. It evaluates if any alarm conditions exist. Monitoring this signal indicates that the
welder is at rest and it is ready to cycle (for example not in TEST, HORN DOWN, latched
alarm condition or system fault).
2.7.4 GENERAL ALARM - Alarm Connector
GENERAL ALARM is a signal which indicates that an alarm has been sensed. Resetting
alarms and resolving system faults clears this alarm signal. Refer to
Displays and Alarms
100-214-251 REV. 05
for further information.
6.5 Weld Cycle State
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