System Start-Up
Chapter 4
42
4.
Verify that the I/O Power Cable connectors are plugged securely into their
sockets.
5.
Verify that all modules are securely held in the I/O Chassis. Verify that the
Field Wiring Arms are fully seated on their I/O Modules and locked in
place on the locking tables.
6.
Disconnect all motors from their starters, valves from their solenoids, etc.,
to ensure that no power–driven machine motion occurs when power is first
applied to the Controller. Where this is not practical, disconnect the user
wiring at some point other than the Field Wiring Arm terminal.
WARNING: Machine motion during this procedure can cause
injury to personnel or damage to equipment. Disconnect any
device that might cause machine motion to occur when energized.
Before beginning, verify operation of the Master Control Relay and Emergency
Stop Switches.
The next stage is to check out the system with power applied to all devices,
except those that cause machine motion.
Status Indicators/Industrial Terminal Use
The system is checked out by comparing the actual I/O device status to the I/O
Module indicators and the Industrial Terminal display (Figure 4–1). When a
connected input device is ON, the corresponding indicator on the Input Module
illuminates. when an output device is turned ON, the corresponding indicator
on the Output Module illuminates. The output device need not be connected to
the output terminal for the I/O Module indicator to illuminate. This is useful for
checking out an output terminal that will be connected to a device causing
machine motion.
The Industrial Terminal indicates the logical TRUE/FALSE status of an
instruction. When an instruction is logically TRUE, the condition is specifies is
met and the instruction will intensify on the Industrial Terminal screen.
Checkout With Power Applied
To Selected Devices
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