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P4810000 Datasheet, PDF (4/8 Pages) Red Lion Controls. Inc – MODEL P48 - 1/16 DIN PROCESS CONTROLLER | |||
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AUTO-TUNE
The P48 has an auto-tune feature which, on demand, automatically
determines the PID control parameters for a particular process. After completion
of auto-tune, the PID parameters are automatically optimized for that process
and loaded into non-volatile memory. The operator may view and modify the
parameters as desired.
Auto-tune may be invoked either at start-up or at setpoint, depending on the
process requirements. An auto-tune programmable dampening factor produces
various levels of process control and response characteristics.
RS485 SERIAL COMMUNICATIONS
The RS485 communications option allows the connection of up to 32 devices
on a single pair of wires with a distance of up to 4,000 feet and a maximum baud
rate of 9600. Since the same pair of wires are used for both transmit and receive,
only one way communication is possible at any given time. The controller has
a programmable response time to allow the host device adequate time to release
the communication line for a transmission.
Selected parameters from the P48 can be interrogated or changed, and alarm
output(s) may be reset by sending the proper command code via serial
communications. It is also possible to invoke Auto-tune through the serial port.
Serial communications used with SFCRM software allows for easy controller
parameter configuration by computer.
DUAL TIME PROPORTIONAL SYSTEMS
The P48 is available with dual time proportional outputs. The dual outputs
can be used for level or heat/cool applications. The A2 output can be configured
for Secondary (cool) control. This allows for dual PID control or ON/OFF
control with unbalanced hysteresis.
CONTROLLER PROGRAMMING
Front Panel Program Disable allows all of the controllerâs set-ups to be
locked-out from further operator intervention after the initial set-up.
The following four programming modes allow the controller to adapt to any
required user-interface level:
Unprotected Parameter Mode
Protected Parameter Mode
Hidden Function Mode
Configuration Parameter Mode
UNPROTECTED PARAMETER MODE *
The Unprotected Parameter Mode is accessible from the Normal Display
mode when program disable is inactive or when the proper access code number
from the Protected Parameter Mode is entered. The Configuration Parameter
Modes can be accessed only from this mode.
âSPâ
âOPâ
âProPâ
âInttâ
âdErtâ
âAL-1â
âAL-2â
âCNFPâ
âEndâ
- Enter setpoint
- Enter output power
- Enter proportional band
- Enter integral time
- Enter derivative time
- Enter value for alarm #1
- Enter value for alarm #2
- Select configuration access point
- Return to normal display mode
PROTECTED PARAMETERS MODE *
The Protected Parameters Mode is enabled when program disable is active.
This mode prevents access to the configuration modes without the proper access
code number. Only the parameters that are enabled in the Configuration 3
parameter (lock-out section) can be accessed.
âProPâ
âInttâ
âdErtâ
âAL-1â
âAL-2â
âCodEâ
- Enter proportional band
- Enter integral time
- Enter derivative time
- Enter value for alarm #1
- Enter value for alarm #2
- Enter value to access unprotected parameters and
configuration parameters
HIDDEN FUNCTION MODE *
The Hidden Function Mode is accessible from the Normal Display Mode.
The functions in this mode may be locked-out individually in Configuration 3
parameter (lock-out section).
âSPSLâ
âtrnFâ
âtUNEâ
âALrSâ
- Select local (SP1 or SP2) or remote setpoint
- Transfer between automatic (PID) control and manual control
- Invoke/cancel PID Auto-tune
- Reset latched alarms
CONFIGURATION PARAMETER MODE
The Configuration Parameter Mode allows the operator to set-up the basic
requirements of the controller. It is divided into sections which group together
related programming steps, such as inputs, outputs, alarms, etc. Upon completion
of each section, the program returns to the Configuration Access Point allowing
the user to return to the Normal Display Mode.
Configuration 1, Inputs (1-IN)
âtYPEâ - Select input signal type
âdCPtâ - Select scaled display decimal point position
ârndâ
- Enter rounding increment and trailing zeros for scaled display
âFLtrâ - Select level of input filtering
âdSP1â
âInP1â
âdSP2â
- Scale main input
âInP2â
âSPLOâ - Enter setpoint lower limit
âSPHIâ - Enter setpoint higher limit
âSPrPâ - Enter setpoint ramp rate
âInPtâ - Select user input function
Configuration 2, Outputs (2-OP) *
âCYCtâ - Enter time proportioning cycle time
âOPACâ - Select output control action
âOPLOâ - Enter output power low limit
âOPHIâ - Enter output power high limit
âOPdPâ - Enter output control dampening
âCHYSâ - Enter ON/OFF control hysteresis
âtcOdâ - Select auto-tuning dampening
âANtPâ - Main Linear DC analog output range
âANASâ - Main Linear DC analog output source
âANutâ - Main Linear DC analog output update time
âANLOâ - Main Linear DC analog output scaling low
âANHIâ - Main Linear DC analog output scaling high
Configuration 3, Parameter Lock-Outs (3-LC) *
âSPâ
- Select setpoint access level
âOPâ
- Select power access level
âdEvâ - Enable deviation display
âbdSPâ - Enable blank display
âCodEâ - Enter parameter access code
âPIdâ
- Select PID access level
âALâ
- Select alarm access level
âALrSâ - Enable alarm reset access
âSPSLâ - Enable local/remote selection
âtrnFâ - Enable auto/manual mode selection
âtUNEâ - Enable auto-tune invocation
Configuration 4, Alarms (4-AL) *
âACt1â - Select operation mode of alarm #1, or select main output
ârSt1â - Select reset mode of alarm #1
âStb1â - Enable activation delay of alarm #1
âAL-1â - Enter value for alarm #1
âACt2â - Select operation mode of alarm #2, or select second output
ârSt2â - Select reset mode of alarm #2
âStb2â - Enable activation delay of alarm #2
âAL-2â - Enter value for alarm #2
âAHYSâ - Enter hysteresis value for both alarms
Configuration 5, Second Output (5-O2) *
âCYC2â - Enter time proportioning cycle time
âGAN2â - Enter relative gain
âdb-2â - Enter deadband or overlap
Configuration 6, Serial Communications (6-SC) *
âbAUdâ - Select baud rate
âConFâ - Select character frame format
âAddrâ - Enter address
âAbrvâ - Select abbreviated or full transmission
âPoPtâ - Select print options
Configuration 7, Remote Setpoint Input (7-N2) *
âdSP1â - Enter remote setpoint display scaling value #1
âINP1â - Enter remote setpoint process scaling value #1
âdSP2â - Enter remote setpoint display scaling value #2
âINP2â - Enter remote setpoint process scaling value #2
âFLtrâ - Enter remote setpoint filter time constant
âbAndâ - Enter remote setpoint filter disable band
âtrnFâ - Select Local/Remote setpoint transfer response
Configuration 8, Second Linear DC Analog Output (8-A2) *
âA2tPâ - Second linear DC analog range
âA2LOâ - Second linear DC analog scaling low
âA2HIâ - Second linear DC analog scaling high
Configuration 9, Factory Service Operations (9-FS)
âCode 48â - Calibrate Instrument
âCode 66â - Reset parameters to factory setting
* These parameters may not appear due to option configuration or other
programming.
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