ELGAS-2 (CP II) communication protocol
Supported device types and versions
Communication line configuration
Communication station configuration
I/O tag configuration
Literature
Changes and modifications
Document revisions
Supported device types and versions
The protocol supports the communication with devices ELCOR-2 and microELCOR-2 (made by company ELGAS) that recalculate a gas quantity.
Communication line configuration
- Communication line category: Serial, SerialOverUDP Device Redundant.
The asynchronous transmission parameter are set according to setting of specific device.
Communication station configuration
- Communication protocol: Elcor ELGAS-2 (CP II).
- Station address:
Node address: value in the range of 0 to 65535.
Measure address: value in the range of 0 to 255.
If the address and measure has the 0 value the device must answer obligatorily.
Password for reading: maximum 6 characters is allowed if the password is set in device (only ELCOR-2).
Station protocol parameters
Configuration dialog box - tab „Parameters".
They influence some optional parameters of protocol. Following station protocol parameters can be set:
Table 1
| Full name | Meaning | Unit | Default value |
|---|---|---|---|
Device Type | Selection of device type. | ELCOR-2 or microELCOR-2 | ELCOR-2 |
Retry Count | Delay between request retry in case of a communication failure. | 3 | |
Wait First Timeout | Delay after sending the request before reading the response. | ms | 100 ms |
Wait Timeout | Delay between response readings till its completing. | ms | 100 ms |
Max. Wait Retry | Retry count of response reading till its completing. | 30 | |
Static Data Read Period | Static - configuration data read period (only microELCOR-2). | min | 60 min |
Hourly Archive Periodic Reading | A period for reading value of hourly archives (0-60 min). Value 0 disables the reading. | min | 0 min |
Wake Up Sequence Length | Length 'wake-up' of data which is entered before the call after longer communication pause. | 0 .. 50 bytes | 25 bytes |
Wake Up Each Query | Insert 'wake-up' data before each query. | YES/NO | NO |
Wake Up Character | Form 'wake-up' data sequence from the characters that has this value. | 0 .. 255 | 255 |
Group Source Address | Group source address (address of D2000 KOM process). | 0 .. 65535 | 0 |
Source Address | Source address (address of D2000 KOM process). | 0 .. 255 | 0 |
| Full Debug | High level of communication tracking, the loaded values of I/O tags and other debug information are shown. | YES/NO | NO |
I/O tag configuration
Possible value types of I/O tags: Di, Ai, Ci, TxtI, TiA.
Device ELCOR-2
Table 2 contains the list of main parameters of device.
Tables 3 to 8 contains the list of variable configuration and informative data according to parameter type. DESC(ind) parameter represents the common data of all parameters. It describes the quantity. The current value of quantity can be acquired by configuration of the I/O tag with numerical address - index ind (number from 1 and more). To find out the technical units - configure text of I/O tag with address UNIT(ind).
Table 2 - Device parameters - Main device parameters
| Object description | Value type | Address | Units |
|---|---|---|---|
| Serial number of device | Ci, TxtI | SN | |
| Referential temperature | Ai | TB | °C |
| Referential pressure | Ai | PB | kPa |
| Firmware version | TxtI | FW | |
| Station name | TxtI | DESC | |
| CO2 concentration | Ai | TAB(0) | % |
| N2 concentration | Ai | TAB(1) | % |
| Heat of combustion | Ai | TAB(2) | MJ/m3 |
| Relative density | Ai | TAB(3) | |
| H2 concentration | Ai | TAB(4) | % |
| H2S concentration | Ai | TAB(5) | % |
| He concentration | Ai | TAB(6) | % |
| H2O concentration | Ai | TAB(7) | % |
| O2 concentration | Ai | TAB(8) | % |
| Ar concentration | Ai | TAB(9) | % |
| CO concentration | Ai | TAB(10) | % |
| C1H4 concentration | Ai | TAB(11) | % |
| C2H6 concentration | Ai | TAB(12) | % |
| C3H8 concentration | Ai | TAB(13) | % |
| iC4H10 concentration | Ai | TAB(14) | % |
| nC4H10 concentration | Ai | TAB(15) | % |
| iC5H2 concentration | Ai | TAB(16) | % |
| nC5H2 concentration | Ai | TAB(17) | % |
| C6H14 concentration | Ai | TAB(18) | % |
| C7H16 concentration | Ai | TAB(19) | % |
| C8H18 concentration | Ai | TAB(20) | % |
| C9H20 concentration | Ai | TAB(21) | % |
| C10H22 concentration | Ai | TAB(22) | % |
Table 3 - Device parameters - Analogue parameter
| Object description | Value type | Address | Units |
|---|---|---|---|
| Analogue parameter - transducer serial No. | TxtI, Ci | SN(ind) | |
| Analogue parameter - upper limit of measuring range | Ai | HL(ind) | |
| Analogue parameter - lower limit of measuring range | Ai | LL(ind) | |
| Analogue parameter - technical units | TxtI | UNIT(ind) | |
| Analogue parameter - name | TxtI | DESC(ind) |
Table 4 - Device parameters - Counter
| Object description | Value type | Address | Units |
|---|---|---|---|
| Counter - serial number of gas meter | TxtI, Ci | SN(ind) | |
| Counter - technical units | TxtI | UNIT(ind) | |
| Counter - name | TxtI | DESC(ind) |
Table 5 - Device parameters - Error counter
| Object description | Value type | Address | Units |
|---|---|---|---|
| Error counter - primary counter number | TxtI, Ci | CNT(ind) | |
| Error counter - technical units | TxtI | UNIT(ind) | |
| Error counter - name | TxtI | DESC(ind) |
Table 6 - Device parameters - Standard counter
| Object description | Value type | Address | Units |
|---|---|---|---|
| Standard counter - primary counter number | TxtI, Ci | CNT(ind) | |
| Standard counter - calculation number | TxtI, Ci | CLC(ind) | |
| Standard counter - technical units | TxtI | UNIT(ind) | |
| Standard counter - name | TxtI | DESC(ind) |
Table 7 - Device parameters - Conversion factor
| Object description | Value type | Address | Units |
|---|---|---|---|
| Conversion factor - analogue (pressure) number | Ci | CNTP(ind) | |
| Conversion factor - analogue (temperature) number | Ci | CNTT(ind) | |
| Conversion factor - pressure error volume | Ai | DEFVALP(ind) | kPa |
| Conversion factor - temperature error volume | Ai | DEFVALT(ind) | °C |
| Conversion factor - compressibility error volume | Ai | DEFVALK(ind) | |
| Conversion factor - technical units | TxtI | UNIT(ind) | |
| Conversion factor - name | TxtI | DESC(ind) |
Table 8 - Device parameters - Standard flow rate
| Object description | Value type | Address | Units |
|---|---|---|---|
| Standard flow rate - primary flow number | Ci | CNT(ind) | |
| Standard flow rate - calculation number | Ci | CLC(ind) | |
| Standard flow rate - technical units | TxtI | UNIT(ind) | |
| Standard flow rate - name | TxtI | DESC(ind) |
Device microELCOR-2
Address of I/O tag can be data from column "Address" or "Default address".
Table 9 - Actual values
| Object description | Value type | Address | Default address | Units |
|---|---|---|---|---|
| Primary volume | Ai | OH.1 | V | m3 |
| Standard volume | Ai | OH.2 | VN | Nm3 |
| Error primary volume | Ai | OH.3 | VEST | m3 |
| Error standard volume | Ai | OH.4 | VNEST | Nm3 |
| Primary flow rate | Ai | OH.5 | Q | m3/hour |
| Standard flow rate | Ai | OH.6 | QN | Nm3/hour |
| Compressibility ratio | Ai | OH.7 | K | |
| Actual pressure | Ai | OH.8 | P | kPa |
| Actual temperature | Ai | OH.9 | T | K |
| Calculation number | Ai | OH.10 | Z | |
| Device temperature | Ai | OH.11 | TPR | °C |
| Operating value - rest (only in VF input) | Ai | OH.12 | VZB |
Table 10 - Service data
| Object description | Value type | Address | Default address | Units |
|---|---|---|---|---|
| Type + serial number | TxtI | SE.1 | VCE | |
| Serial number of temperature sensor | TxtI | SE.2 | VCT | |
| Serial number of pressure transducer | TxtI | SE.3 | VCP | |
| Version SW+HW | TxtI | SE.4 | VER | |
| Customer number | TxtI | SE.5 | CZ | |
| Serial number of gas meter | TxtI | SE.6 | PVC | |
| Network address | TxtI | SE.7 | ADR | |
| Constant of gas meter | Ci | SE.8 | KP | 0=1, 1=0.1, 2=0.01, 6=100, 7=10 |
| Measuring interval | Ci | SE.9 | IM | |
| Interval of data sending through serial line | Ci | SE.10 | IV | |
| Start hour of gas day | Ci | SE.11 | CD | |
| Start of measurement | TiA | SE.12 | DSM | |
| Date and time of device | TiA | SE.13 | DAT | |
| Battery capacity | Ci | SE.14 | BAT | % |
| Actual status | TxtI | SE.15 | OS | |
| Configuration bytes | TxtI | SE.16 | KB | |
| Communication rate of serial number | Ci | SE.17 | RK | 4=4800, 5=9600, 6=19200 |
| CRC 51 | Ci | SE.18 | C1 | |
| CRC MSP 430 | Ci | SE.19 | C2 | |
| CRC EEPROM1 | Ci | SE.20 | C3 | |
| CRC EEPROM2 | Ci | SE.21 | C4 | |
| CRC EEPROM3 | Ci | SE.22 | C5 | |
| Battery voltage | Ai | SE.23 | UPRHEX | V |
| Display configuration | Ci | SE.24 | KDIS | |
| Bits of permission to write the items | TxtI | SE.25 | W_RUN | |
| Customer's region | TxtI | SE.26 | REGION | |
| Saving interval in hourly archive | Ci | SE.27 | IU | |
| Quantity of diff. pulses between IMP and IMP1 | Ci | SE.28 | IMP1_PI | 0=off, 255=on permanently |
| Input pulse ratio | Ci | SE.32 | I_V_DP | |
| Bits of record permission in RUN by a user | Ci | SE.33 | WU_RUN | |
| Actual status 2 | Ci | SE.34 | OS2 | |
| Setting of pulse ratio of gas meter VF on m3 | Ci | SE.35 | KPVF |
Table 11 - Parameters
| Object description | Value type | Address | Default address | Units |
|---|---|---|---|---|
| Base pressure | Ai | PA.1 | PN | kPa |
| Base temperature | Ai | PA.2 | PT | °C |
| Default pressure | Ai | PA.3 | PEST | kPa |
| Default temperature | Ai | PA.4 | TEST | °C |
| Default compressibility level | Ai | PA.5 | SK | |
| Min. pressure limit | Ai | PA.6 | PMIN | kPa |
| Max. pressure limit | Ai | PA.7 | PMAX | kPa |
| Min. temperature limit | Ai | PA.8 | TMIN | °C |
| Max. temperature limit | Ai | PA.9 | TMAX | °C |
| Limit of max. flow rate | Ai | PA.10 | QMAX | m3/hour |
| Method of compressibility calculation | Ci | PA.11 | MK | |
| CO2 concentration | Ai | PA.12 | KCO2 | % |
| N2 concentration | Ai | PA.13 | KN2 | % |
| H2 concentration | Ai | PA.14 | KH2 | % |
| Relative density | Ai | PA.15 | KD | % |
| Heat of combustion | Ai | PA.16 | KHON | kWh/m3 |
Table 12 - Minima/maxima
| Object description | Value type | Address | Default address | Technical units |
|---|---|---|---|---|
| Pressure under range | Ai | MI.1 | PMMIN | kPa |
| Time of pressure under range | TiA | MI.2 | DPMMIN | |
| Pressure above range | Ai | MI.3 | PMMAX | kPa |
| Time of pressure above range | TiA | MI.4 | DPMMAX | |
| Temperature under range | Ai | MI.5 | TMMIN | °C |
| Time of temperature under range | TiA | MI.6 | DTMMIN | |
| Temperature above range | Ai | MI.7 | TMMAX | °C |
| Time of temperature above range | TiA | MI.8 | DTMMAX | |
| Flow rate above range | Ai | MI.9 | QMMAX | m3/hour |
| Time of flow rate above range | TiA | MI.10 | DQMMAX | |
| Time of reset time (minima/maxima) | TiA | MI.11 | DNUL |
Parameters and minima/maxima are read in period which is set in protocol parameter value Static Data Read Period.
Literature
- Description of system μ-ELCOR and microELCOR-2 - operating schedule (Elgas 1. 6. 2006)
- Reference books of producer ELGAS s.r.o.
Changes and modifications
-
Document revisions
- Ver. 1.0 - April 22th, 2009 - creating of document.
Related pages: