ControlMaster CM10, CM30 and CM50
Universal process controllers,
1
/
8
,
1
/
4
and
1
/
2
DIN
7 Advanced Level
68
IM/CM/S–EN Rev. R
7.6.2 Guaranteed Ramp / Soak
If the process variable deviates from the set point by more than the hysteresis value, the program status is set to
HOLD
and Guaranteed ramp/soak is applied automatically.
Each program has two associated hysteresis values:
Ramp – applied to ramping segments
and
Soak – applied to soak segments
The hysteresis value can be set within the limits '0' to '9999' where a setting of '0' implies that no deviation from the
set point value can be tolerated.
Hysteresis can be applied in one of four ways, with individual settings for each segment:
None – hysteresis not applied, ramp/soak not guaranteed.
High – hysteresis applied above set point (Holdback ('HOLD') set if PV > [SP + Hysteresis]).
Low – hysteresis applied below set point ('HOLD' set if PV < [SP – Hysteresis]).
High/Low – hysteresis applied above and below set point (HOLD set if PV > [SP + Hysteresis] or PV < [SP – Hysteresis]).
