Rockwell Automation 1772-L8_LW_LWP_LX_LXP,D17726.5.8 User Manual - Manual (Page 100)

Starting Your Processor
Chapter 5
5-18
ATTENTION: Unexpected machine motion during system
start-up can damage equipment and injure personnel.
Disconnect any device that might cause machine motion to occur when it
is energized.
Before you supply ac power to your processor do the following:
1. Measure the ac line voltage and make sure it corresponds to the
system power supply. Verify the L1, L2 and Chassis Gnd
connections
(L1 = ac high, L2 = ac return).
2. Check the wiring of:
main disconnect switch or circuit breaker
master control relay
emergency stop switches
3. Check the power cable connections. Make sure plugs are securely
held in their sockets.
4. Check the location and chassis positioning of each I/O module. All
I/O chassis latches must be snapped down. All field wiring arms
must be connected with their corresponding I/O modules.
5. Disconnect all motors to ensure that no power-driven machine can
start when you first apply power to the processor. Alternatively,
disconnect the output device at its terminal strip.
6. Test each output point and input point of each module in accordance
with the suggestions of the following sections.
There are four ways to test output devices, using:
a pushbutton (you supply the pushbutton)
force functions (through the industrial terminal). (See chapter 26.)
using the 1771-SIM switch/indicator module
bit monitor/manipulation (SEARCH 53). (See chapter 25.)
Before You Supply AC Power
Testing Output Devices