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
ON
1
2
!
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.
Summary of Contents for Allen-Bradley 842D
Page 10: ...P 6 Using this Manual Notes...
Page 18: ...3 4 Configuring the DeviceNet Encoder DIP Switches Notes...
Page 56: ...I 4 Index Notes...
