50 Rockwell Automation Publication 22C-UM001J-EN-E - January 2017
Chapter 2 Start Up
Keypad Hand-Off-Auto
Functions
Parameter P042 [Auto Mode] defines the operation mode of the control keys
on the integral keypad.
Hand-Off-Auto Mode
In HAND mode:
• Control keys operate as Hand-Off-Auto.
• Start command and speed reference come from the integral keypad
Start/Hand and Digital Speed Increment and Decrement keys.
• Auto key switches control from HAND mode to AUTO mode in a
bumpless transfer as long as there is an active Run command.
In AUTO mode:
•Auto key LED is illuminated.
• Start command is defined by P036
[Start Source].
• Speed Reference command is defined by P038
[Speed Reference].
• Start/Hand key switches control to the integral keypad in a bumpless
transfer and switches the speed reference to the integral keypad.
• Stop key stops the drive and the drive switches to HAND mode.
Table 14 - P042 [Auto Mode] = 1 “Hnd-Off-Auto” (Default)
T051-T054 [Digital Inx Sel] ≠ 2 “Auto Mode” or 3 “Local”
HAND Mode AUTO Mode
Key LED Key Function LED Key Function
On Starts drive.
Runs according to Speed Increment/
Decrement keys.
On Changes to HAND Mode and Starts
drive.
Runs according to Speed Increment/
Decrement keys.
On Changes speed. Off Not active.
Keys are only active if P038 [Speed
Source] = 0 “Drive Pot”.
Off Changes to AUTO Mode. On Not active.
N/A Stops drive. N/A Changes to HAND Mode and Stops
drive.
IMPORTANT Certain digital input settings can override drive operation.
Refer to Start and Speed Reference Control
on page 37 for details.
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