Rockwell-automation 842D-60131331BXA DeviceNet Encoder User Manual Manual do Utilizador descarregar pdf (Página 17)

Configuring the DeviceNet Encoder DIP Switches 3-3

Figure 3.2 Bus Termination Switches

Note: Remote setting of the DIP switches via a Node Commissioning

Tool is not supported at this time.

Diagnostic LED

Once the DIP switches have been properly set, the 842D may be

connected to a DeviceNet network. LED functions are as follows:

Preset function

The 842D ‘POSITION VALUE’ is set to zero when the PRESET

function is executed (by Reset Position Button or DeviceNet). This

predefined value is stored in the EEPROM. The factory default

PRESET value is zero.

The PRESET function is not intended for use in dynamic parameter

setting operations but as an electronic adjustment function during

commissioning, in order to allocate a specific value to the mechanical

rotary position of the 842D.

If the PRESET value is set by DeviceNet, the value must be within

the total working range currently configured (steps per revolution and

number of revolutions).

The Reset Position Button should only be operated when the encoder

is powered and the green LED is blinking or steady.

LED Status

Off Not connected, not on line

Green Blinking Active but not allocated by master

Green Steady Active and allocated by master

Red Blinking Minor fault and/or connection interrupt

Red Steady Critical communication fault

Bus Termination

1 and 2 OFF: not active

1 and 2 ON: active

ATTENTION: The PRESET function results in a

change of position reading. This can cause unexpected

motion which could result in personal injury and damage

to the product or equipment. During PRESET, steps

should be taken to ensure the shaft is stationary and will

remain so.

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Rockwell-automation 842D-60131331BXA DeviceNet Encoder User Manual Manual do Utilizador Página 17