MCT-MC
4.3
FDC MCT-MC
- 170 -
Appendix
A.3 Profile Recovery Detail
The following will provide a detailed explanation of program recovery operation for the MC.
Program Power Recovery
1. Static Mode
When power is cycled the program will be terminated. The current control set point and manual events
will return to the previous static set point and event activation that were used prior to the program being
started.
2. Continue From SP
When power is cycled the program will resume operation in the same step with the same event
activation and step time that were present at the time of power interruption. The accuracy of time
recovery will be from the beginning of each step and every 6 minutes into the step. The set point;
however, is dependent upon step type.
a. When recovery occurs on a ramp step, the set point and time remaining in the step will return
to the values at the last save interval. If less than 6 minutes into the step, the step will resume
from the beginning of the step. If more than 6 minutes into the step, the step will return to the
last 6 minute interval that elapsed (from the beginning of the step) and resume from the set
point and time remaining at that moment the save occurred.
b. When recovery occurs on a soak step, the time remaining in the step will return to the last save
interval. If less than 6 minutes into the step, the step will resume from the beginning of the
step. If more than 6 minutes into the step, the step will return to the last 6 minute interval that
elapsed (from the beginning of the step) and resume from the time remaining at that moment
the save occurred.
The set point will return to the programmed soak set point, i.e., the set point of the previous
ramp step in the program. If a program is started on a soak step, the set point is defined by
the “setpoint at start of automatic program setting.” However, on recovery, the set point is
defined by the programmed set point which may be different from the original soak set point at
the start of the program.
Example:
A program is started on step 2 which is a soak step. The “current control setpoint”
(static set point) is chosen as the starting program set point. If the static set point is 25, the
program will begin and soak at the set point of 25. On power recovery, the set point will go to
the set point defined by the program, so if step 1 of the program is a ramp to 50, the set point
will be 50 on power recovery and the program will finish the remainder of the soak time with a
set point of 50.
3. Continue From PV
When power is cycled the program will resume operation in the same step with the same event
activation that was present at the time of power interruption. The set point and time remaining;
however, are dependent upon step type.
a. When recovery occurs on a ramp step, the program will resume with the control set point equal
to the current process value.
Summary of Contents for MCT-MC 4.3
Page 1: ...MCT MC 4 3 User Manual MCT MC 4 3 User Manual Rev A February 2018...
Page 176: ...MCT MC4 3 FDC MCT MC 176 Appendix...
Page 177: ...MCT MC4 3 Appendix 177 FDC MCT MC Open Frame Power Supply Specifications...
Page 178: ...MCT MC4 3 FDC MCT MC 178 Appendix...
Page 179: ...MCT MC4 3 Appendix 179 FDC MCT MC A 6 Power On Delay Relay Specifications GE1A C10HA110...
Page 180: ...MCT MC4 3 FDC MCT MC 180 Appendix...
