ALYA - lubrications communication protocol
Supported device types and versions
Communication line configuration
Communication station configuration
I/O tag configuration
Literature
Document revisions
Supported device types and versions
This protocol supports data reading/writing from the controllers of ALYA lubricant reservoirs.
Since July 2015, this protocol supports a group of I/O tags for data reading / writing from Manex production lines - see Table 4.
Communication line configuration
- Communication line category: Serial.
- Serial line parameters:
- Baud Rate: 38400 Baud
- Odd parity, 8 data bits, 1 stop bit
Communication station configuration
- Communication protocol: ALYA Lubrikacie.
- Station address is an address of control station for the communication over RS485 bus. Address is a one-byte value.
Note: commonly used station addresses (A,B,C...) must be configured as their ASCII codes, i.e. 65, 66, 67 ..
Station protocol parameters
Communication station - configuration dialog box - "Protocol parameters" tab.
They influence some of optional parameters of protocol.
Table 1
| Key word | Full name | Meaning | Unit | Default value |
|---|---|---|---|---|
WT | Wait Timeout | Delay between the readings of response until it is completed. | ms | 100 millisec. |
WFT | Wait First Timeout | First waiting on response after sending the call. | ms | 100 millisec. |
RT | Retry Timeout | Delay between the retry of call if some error in communication occurs. | ms | 100 millisec. |
MWR | Max Wait Retry | Number of response reading retry until it is completed. | - | 6 |
RC | Retry Count | Number of request retries in case of a communication failure. | - | 2 |
String containing the protocol parameters is being defined as follows:
Key_word=value;Key_word=value; ...
Example:
WT=150;MWR=10;
If there is used a keyword with an invalid value in the initialization string, there will be used corresponding default value according the table 1.
I/O tag configuration
I/O tags: Ai, Ao, Di, Dout.
I/O tag address is an abbreviation of mnemonic name of I/O object. The list of objects is listed in the table below:
Table 2
| Address | Meaning | Value type | Read/Write |
|---|---|---|---|
| AV | Current weight [kg] | Ai | R |
| HI | Emergency minimum [kg] | Ai, Ao | R/W |
| HA | Emergency maximum [kg] | Ai, Ao | R/W |
| PN | Operating minimum [kg] | Ai, Ao | R/W |
| PX | Operating maximum [kg] | Ai, Ao | R/W |
| SP | Filling status (TRUE - filling, FALSE - draining) | Di | R |
| EN | Error number - see Table 3 | Ai | R |
| WS | Write to serial EEPROM (all changes of Ao must be written to EEPROM, if not, they vanish at the next reset) | Do | W |
| RT | Reset (it retrieves the reset of control station) | Do | W |
The list of error codes when reading the parameter "EN":
Table 3
| Error code | Meaning |
|---|---|
| 0 | Weight is OK. |
| 1 | Weight is under permitted range. |
| 2 | Weight is over permitted range. |
| 3 | Weight is under emergency minimum. |
| 4 | Weight is over emergency maximum. |
| 10 | Weight converter does not respond. |
| 20 | Weight converter is not connected. |
| 30 | Strain gauge is not connected. |
I/O tags for data reading / writing from Manex production lines:
Table 4
| Address | Meaning | Value type | Read/Write |
|---|---|---|---|
| RN | New weighted roving. After weighting and printing the weight ticket, the application writes a text string into I/O tag in the format: ID;CV;VZ;POC;ZD; where:
| TxtO | Write |
| RX | Cancelling a roving. After an operator puts down the roving from the scale, the application will write the number of scale (1 or 2) into the I/O tag. | Co | Write |
PC | Number of spools on the lines. I/O tag is in the format "C1;C2;C3; … Cn;", where Ci represents an integral number that indicates number of spools on the line i. Example: "626;42;0;78;562;489;28;55;" | TxtI | Read |
| NC | Reset the counters of spools on the lines. Write any valid value, to reset the counters. The control unit will send message in the format "C1;C2;C3; … Cn;", where Ci represents an integer number that indicates the number of spools which were included on the line i since the most recent information on the number of spools (see PC). This message will be a new value of I/O tag with the address NC. | TxtO | Write |
Literature
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Document revisions
- Ver. 1.0 - August 21, 2001 - creation of document
- Ver. 1.1 - July 15, 2015 - support of Manex production lines
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