Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 189)

Publication 900-UM007D-EN-E - January 2011
Parameter Adjustments & Application Considerations 4-53
12. Press the O key for at least 1 second to move from the Advanced
Setting function group to the Initial Setting function group.
Figure 4.107
13. Press the O key for at least 1 second to move from the Initial Setting
function group to the Operation function group.
Figure 4.108
Performing Manual Control Manual Operation
You (the operator) can take manual control of the manipulated variable when
the PV/MV parameter is displayed in the Manual Control function group. The
final MV (Manipulated Variable) used in automatic mode will be used as the
initial manual MV when moving from automatic mode to manual mode. In
manual mode, the change value will be fixed immediately and reflected in the
actual MV (bumpless transfer).
• Manual operation can be used only for PID control.
• The automatic display return function will not operate in manual mode.
• Balanceless-bumpless operation will be performed for the MV when
switching from manual operation to automatic operation. (Refer to the
Note on page 4-53.)
• If a power interruption occurs during manual operation, manual
operation will be restarted when power is restored using the same MV as
when power was interrupted.
• Switching between automatic and manual operation is possible for a
maximum of one million times.
Note: In balanceless-bumpless operation, the MV before switching is used
initially after the switch and then gradually changed to achieve the
proper value after switch to prevent radical changes in the MV after
switching operation.
in-t
5
Input type
C 25
100
PV/SP