30
Preset Torque
4.2.5
** Note : For Details regarding Preset Torque please contact AUMA Service Team.
SSR Tuning for Regulating Duty
4.2.6
Solid state relays can be used in place of contactor in 3.XMP module for better precision. To identify if the
actuator is Solid State Relay based check the firmware version. Firmware version ending with “S” is a SOLID
STATE RELAY actuator.
In Solid state relay we have the following important parameters which need setting.
1.
P Band in terms of %:
P band is the band set onset of which starts the fine control action. Span of
P Band is from 1% to 10%. This is the start of the control cycle (cycle time). Ref. fig.1
2.
H Band (Hysteresis band) in terms of %:
H band (Hysteresis band) the band in which no control action
takes place. If the valve position is within this band there will be no movement. The span of H Band is
from 0.1% to 10%. This is almost near to the set value. Ref. fig.1.
3.
Duty cycle in terms of sec:
The total duration for which P band operates. The on time & off time of
system depends on the P band. The span of Duty cycle is 1 sec to 5 sec. Ref. fig 1
Preset Torque
Stop Key Enter
Enter Password
Press Stop Key
AA
Stop
Stop
Enter Password
****
Stop
Preset Torque
Yes/No
Yes
Stop
