Rockwell-automation 1771-QB Linear Pos. Manual de usuario descargar pdf (Pagina 53)

Installing the Linear Positioning Module

Chapter 5

514

Power Supply

To connect the discrete input power supply, follow these steps:

1. Connect the (+) side of the discrete input power supply to the I/P SUPPLY

terminal (27) of the module.

2. Connect the common of the discrete input power supply to the I/P

COMMON terminal (28) of the module.

3. Connect the cable shield to ground at the I/O chassis end.

4. Connect the power supply chassis to ground.

Auto/Manual Input

The auto/manual input, in conjunction with the auto/manual bit in the command

block, determines the module’s mode of operation. Both the auto/manual input

and the auto/manual bit must be on to achieve auto mode. Otherwise, the mode

is manual. Connect the auto/manual and common terminals to an external

source.

Hardware Start Input

The hardware start input performs the same function as the software start. (See

Chapter 8.) When you command a setpoint, no axis movement occurs on that

control loop until the module receives a start command or a transition from low

to high (after at least 20 msec of low) at the control loop START terminal

(15/16).

Example: To start movement to a setpoint when Output 1 (configured as the

in-position output) of another control loop goes high, connect the hardware start

input to the Output 1 of that control loop.

You don’t need to connect the hardware start terminals if you won’t be using

this feature.

Hardware Stop Input

A low input at the STOP terminal (17/18) will stop axis movement for the

corresponding control loop. This allows you to connect any number of normally

closed emergency stop switches in series between a high source and the

hardware stop terminal. Opening any of these switches will immediately zero

the analog output for that loop.

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Rockwell-automation 1771-QB Linear Pos. Manual de usuario Pagina 53