Pixsys PL-300 Temperature Controller
Data acquisition module PL300
הקדמה
The module PL300 is a powerful data acquisition module which can be used as I/OAn interface for Industrial terminals or SCADA It allows to measure of temperature values with different types of thermocouples and thermoresistance and/or it enables the acquisition of normalized signals by means of a 14 bit converter. The 6 digital inputs can get eventual alarm notices and the 2 linear outputs (isolated 14 bit) can drive different types of transducers. Twelve relay outputs (2 relays 8A + 10 relays 5A / 230VAC resistive) are available. Beside the mixed acquisition system, a great advantage of this module PL300, compared to any PC board, is the possibility to place it close to the plant and let it communicate with the central unit via RS485 or Current loop 20mA (both interfaces are galvanic isolated). This means a higher immunity to any external noise, beside the possibility to simplify the wirings. The module has been designed and built in compliance with current CE standards and it widely meets the safety requirements for light and heavy industry.
U1÷U4 available only on PL300-10AD- Available only on PL300-30AD
פראָנטאַל טאַפליע
Size and installation
עלעקטריקאַל וויירינגס
Up to max. 80 mA, to supply SSR outputs it is possible to use the common positive signal of digital inputs (pins 3,6,9,18) and the negative signal of general power supply (pin 2).
Examples of sensors connections to analog inputs PL300
Example of connection to RS485 and to a Master unit
Select type of linear output
- PL300 is provided with 2 linear outputs (OUT1, OUT2) which must be configured via software and manually by configuring 2 dip-switches on board:
- Disconnect power supply PL300.
- Use a screwdriver to remove the upper cover of PL300
- Set dip SW1 (for OUT1) and SW2 (for OUT2) as shown here below to configure the output
- Replace the upper cover and restart PL300.
- Dip SW1-1 and SW2-1 are used to set the communication address of PL300, not for outputs selection.
קאָמוניקאַציע אַדרעס
- Two dip-switches allow to set the address of module PL300 to communicate with a
- Master device. Four combinations of jumpers are available, therefore to connect more than 4 modules to the network it is necessary to modify the value of offset parameter. The address of the module is given as follows:
- MODULE ADDRESS = ADDRESS OFFSET + COMBINATION OF DIPSWITCHES
- The address offset is stored on memory of PL300 (default is 0) and it can be modified on Modbus word 5.
- To set the address proceed as follows:
- דיסקאַנעקט מאַכט צושטעלן
- Remove upper cover of PL300
- Set dip SW1-1 and SW2-1 as described below : the obtained value must be added to offset value in order to get the complete address.
Place cover and restart PL300.
List of configuration parameters
- Configuration parameters are stored on the EEPROM, therefore they will not be lost in case of power failure. Each parameter can be written max. 100.000 times, therefore avoid useless writings of parameters. At each modify of parameters, PL300 starts the initialisation of both input reading and outputs rate. This stage lasts about 2 seconds. Some parameters are handled as hexadecimal digits: the parameter is divided into 4 nibbles (groups of 4 bit) to be represented.
- “1 st digit” = bits 12÷15
- “2 nd digit”= bits 8÷11
- “3 rd digit” =bits 4÷7
- “4 th digit”= bits 0÷3 ( bit 0 is meant as less significant)
Realy outputs U1÷U4 are available on PL300-1XAD (12 relay OUT), SSR1÷SSR4 outputs are available on PL300-3XAD (4 SSR + 8 relay OUT).
Configuration of alarms for analog inputs
For each analog input, two alarms can be used and their operating is depending on the values of parameters P-57 to P-76. The tables below show the different operatings available for alarms.
Tuning (Automatic setting of PID parameters)
- In Tuning action the characteristics of the controller are matched to those of the process being controlled in order to obtain:
- table “straight-line” control of the temperature at the setpoint without fluctuations
- overshoot or undershoot of the temperature at the setpoint
- quick response to deviations from the setpoint caused by external disturbances, thereby restoring the temperature rapidly to the setpoint value
- Tuning involves calculating and setting the value of the following parameters:
- Proportional band (The bandwidth in display units over which the output power is proportioned between minimum and maximum )
- Integral time (determines the time taken by the controller to remove steadystate error signals)
- Derivative time (determines how strongly the controller will react to the rate of change of the measured value)
- Servo-control time (determines the cycle time for time proportioning output)
- For the management of motorised valves (Open/Close), time is not rated.
Protocol Modbus RTU
- Module PL300 is conceived for connection to SCADA systems or Terminals via Modbus RTU. Serial communication enables the programming of parameters, configuration of I/O, reading of analog/digital inputs and outputs control.
Addresses WORD/BIT PL300 for Modbus RTU
- The following tables contain all data (words and bits) which may be handled by Modbus protocol. The tables report reading and writing features as well as the value assumed at the starting of PL300. According to inizialization value assumed at starting, the following type of value are possible:
- “EEP” value stores on Eeprom memory and kept also in case of power failure
- "טיAMP” value stored on non-volatile RAM memory. Also these data are stored in case of power failure (approx. 4 months)
- “?” These values are not given at the starting of PL300
- Numeric value: the value assumed at starting of PL300 is the one which is reported in the table.
For details about the options described above, see parameter P-54.
פּיקסיס
Via Tagliamento, 18
30030 Mellaredo di Pianiga (VE)
www.pixsys.net
בליצפּאָסט: sales@pixsys.net – support@pixsys.net
Software Rev. 1.01
2300.10.054-RevA 010704
FAQ
ק: וואָס איז די וואָג פון די פּראָדוקט?
A: The product weighs about 400 gr.
Q: What are the available communication protocols?
The product supports selectable Baud-rate and answer delay for communication.
דאָקומענטן / רעסאָורסעס
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Pixsys PL-300 Temperature Controller [pdfבאַניצער מאַנואַל PL-300 Temperature Controller, PL-300, Temperature Controller, Controller |