Controller Setup; Table 4 Controller Setup Details; Table 5 Controller Modes Defined - Honeywell 900 User Manual

Controller Setup

Controller Setup
The current controller mode is indicated on the bottom right of the display.
Item
Set Controller Time
and Date
Change mode of the
controller
Write To Flash
Mode Function Blocks Executed?
RUN Yes
OFFLINE No
PROGRAM No
ATTENTION
You cannot change the controller mode from this display if the controller's mode switch is in the
RUN LOCKED or PROGRAM LOCKED position. If the switch is in either of these locked
positions, this display will show the message "MODE MUST NOT BE LOCKED OR FAULT."
TIP
• If the controller switch is set to RUN but the mode was set to PROGRAM or
OFFLINE here, following a power cycle the mode will return to RUN.
• Changing from Program to Run causes data in RAM (setpoint profiles, recipes,
schedules, sequences) to be copied to non-volatile (FLASH) memory.
• In a cold start, all data storage and display buffers are cleared and accumulated
values of some function blocks (such as totalizers) are reset.
• In a resume, all buffered data and values are retained and the process resumes
where it left off.
Revision 9
May 2014

Table 4 Controller Setup details

Set the controller time and date.
Run Mode: Select this to resume running the process.
Offline Mode: Select this before performing AI calibration.
Program mode: Select this:
• Before performing AI and AO Calibration.
•
To turn off all of the controller outputs while reconfiguring a control strategy.
Cold Start: Refreshes the Flash memory of the controller so that if your battery goes
dead the data in Flash is up to date. Use the Program mode for changes whenever
possible.
Write controller database to Flash memory. Controller must be in the Run, Run Locked,
or Offline Mode. Saves any parameters that you may have changed in the controller to
the controller's non-volatile Flash memory. The affected parameters include:
Loop tuning parameters (gain, rate, reset, etc.)
Changes to Recipes, Profiles, Schedules, and Sequences.
If the write fails, upload the controller's configuration to the PC (using HC Designer) and
save the uploaded configuration to disk to make sure that you have captured all of the
non-volatile parameter changes.

Table 5 Controller modes defined

Outputs updated
Outputs held
Outputs off
900 Control Station User Guide
Description
Output status? Effect upon return to RUN mode?
None
Resume
Cold start
Main Menu
Controller
19