Nextron MASTERTRACE MS-2102, Руководство оператора

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6.8
MS-2102 Chapter 6 Setpoint Values
MESSAGE NO: S2-06 APPLIES TO: Selected Heater
DEFAULT VALUE: off VALUE RANGE: 1 to 24 hrs, off
DISPLAY MODE: Advanced RESTRICTIONS: Heater Setpoint must not be
off .
This function sets the Auto Tuning Period. Once the period is set, the controller
would automatically adjust its proportional control gain constant based on the system
performance data every Auto Tuning Period. The exact value of this Auto Tuning
Period depends the inertia time constant of the heat tracing system. The slower the
heat tracing system is, the longer the auto tuning period should be. With Auto
Tuning Period set to
off , the auto tuning feature is disabled and the proportional
control gain constant stays on a fixed large value.
MESSAGE NO: S2-07 APPLIES TO: Selected Heater
DEFAULT VALUE: 1 C° VALUE RANGE: 0 to 50 C°
2 F° 0 to 90 F°
DISPLAY MODE: Advanced RESTRICTIONS: Proportional Control must
be off . Heater Setpoint
must not be off .
This feature sets the size of the deadband for on-off control. Decreasing the deadband
increases the temperature control accuracy but also increases the heater switching
frequency.
MESSAGE NO: S2-08 APPLIES TO: Selected Heater
DEFAULT VALUE: off VALUE RANGE: on, off
DISPLAY MODE: Advanced RESTRICTIONS: Heater Setpoint must not be
off .
This function sets the heater fail-safe state. The Control Module detects if the
temperature sensor has failed. In this case, it will set the heater to its fail-safe state.
For freeze protection where there is no hazard from over heating, set to
on to prevent
freeze up. If there is a potential hazard from over heating, this setting should be set to
off .
MESSAGE NO: S2-09 APPLIES TO: Control Module
DEFAULT VALUE: 1 RTD VALUE RANGE: See list below
DISPLAY MODE: Advanced RESTRICTIONS: Dual RTD per circuit mode
This function sets how the Heater Control Temperature is derived from dual RTD
inputs as follows.
VALUE
Heater Control Temperature
1 RTD RTD-A
RTD B HT cutoff RTD-A but less than RTD-B
2 RTDs, lowest Minimum of RTD-A & RTD-B
2 RTDs, highest Minimum of RTD-A & RTD-B
2 RTDs, averaged Average of RTD-A & RTD-B
2 RTDs, backup RTD-A if okay, else RTD-B
When RTD B HT cutoff is selected, RTD-B temperature is compared with the high
temperature alarm. When RTD-B temperature is equal to or greater than the high
temperature alarm setting, the heater is turned off regardless if RTD-A temperature
is less than the heater setpoint.
AUTO TUNING
PERIOD: off
DEADBAND
5C°
IF RTD FAILS
HEATER GOES: off
RTD MODE:
1 RTD