Rockwell Automation 1784-KTXD User Manual download pdf (Page 124)

Publication 1747-UM011F-EN-P - May 2007

124 Starting Up Your Control System

• United States: r ef e r t o N FPA 7 0 E, E l ec tr i c a l S af et y R e qu ir em en t s fo r

Employee Workplaces.

1. Inspect Your Installation

You can often prevent serious problems in later test procedures by

first making a thorough physical inspection. We recommend that you

perform the following procedure.

1. Make sure that the controller and all other devices in the system

are securely mounted.

2. Check all wiring including:

• connections from the main disconnect to the controller input.

• the master control relay/emergency-stop circuit.

• input device circuits.

• output device circuits.

Make certain that all wiring connections are correct and that

there are no missing wires. Check the tightness of all terminals

to make certain wires are secure.

3. Measure the incoming line voltage. Be certain that it

corresponds to controller requirements and that it falls within

the specified voltage range. See specifications for input voltage

ranges on page 178.

2. Disconnect

Motion-Causing Device

In the following test procedures, the controller is energized. As a

safety precaution, you must make certain that machine motion does

not occur. The preferred way is to disconnect the motor wires at the

motor starter or the motor itself. In this way, you can test the

operation of the starter coil, verifying that your output circuit is wired

correctly and functioning. Similarly, the preferred way to disconnect a

solenoid is to disengage the valve, leaving the coil connected.

In some instances, you may not be able to disconnect a device the

preferred way. In this case, it is necessary to open the output circuit at

some convenient point.

For circuit testing purposes, it is best to open the circuit at a point as

close as possible to the motion-causing device. For example, your

output might be a relay coil that in turn energizes a motor starter; if it

is impractical to disconnect the motor wires, the next best thing to do

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Rockwell Automation 1784-KTXD User Manual Page 124