Controller Fault Messages
Controller fault messages and fail save are the same as for the positioner version. Refer to Chapters 12
and 13 for details.
Mode Transfer of Process Controller
The interface of the Controller Monitor window (figure 58) provides three buttons for mode transfer of
process controller. These buttons are labeled as R for remote automatic, L for local automatic, and M
for manual.
•
Remote to Local Automatic Control:
Click the L button to make this transfer. The red mode
light moves to the L button. The controller output remains unchanged at the moment of the
transfer, so the transfer is bumpless. If the option of setpoint tracking is selected, the value of
local setpoint is set to the value of remote setpoint at the moment of the transfer. Otherwise, the
value of local setpoint is set to the last local setpoint or initial setpoint if this is the first time in local
automatic mode upon power being applied to the SVI controller.
•
Remote Automatic to Manual Control:
Click the M button to make this transfer. The red mode
light moves to M button. The controller output remains unchanged at the moment of the transfer.
•
Local to Remote Automatic Control:
Click the R button to make this transfer. The red mode
light moves to the R button. The controller output remains unchanged at the moment of the
transfer, so the transfer is bumpless. The new setpoint is the real time remote setpoint from the
primary signal. Before the transfer, compare the values of remote and manual setpoints displayed
in the window so the impact of the transfer can be estimated before the transfer.
95
Figure 58. Controller
Monitor Mode Transfer
Window
