SPOOL communication protocol
Supported device types and versions
Communication line configuration
Communication station configuration
I/O tag configuration
Literature
Changes and modifications
Document revisions
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This protocol allows
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reading of the weighted values of spools in the scales produced by ALYA Poprad. It can be used when several scales are connected to a line, since it contains the scale addressing.
For communication with one scale, you may use a simpler protocol ALYA Gina.
ALYA Spool enables to send a request to several scales (they
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can be selected by the station parameter Scales). Each scale can send a response in the format
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<STX><weight><tara><material><stand><winding><ETX><CRC>, where:
- <STX> start byte (02H)
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- <weight> 7 bytes for material weight, e.g. " 23.00"
- <tara> 6 bytes for tare, e.g. " 0.00"
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- <material> 4 bytes for material code, e.g. "0000"
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- <stand> 4 bytes for number of stand, e.g. " 331"
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- <winding> 1 byte for
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- coil winding. 1=full
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- winding, 0=non-
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- full winding
- <ETX> stop byte (03H)
- <CRC> check sum
Example of response:
<STX> 23.00 0.000000 3311<ETX>2The address of the I/O tag is a number of a stand, on which the weight was measured .
(" 331" in example above)
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- Communication protocol: ALYA Spool
- Station The station address is not important.
Configuration dialog window - tab "Protocol parameters".
They influence some optional parameters of the protocol.
Table 1
| Parameter | Meaning | Unit | Default value | |||
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| Waiting between the |
| readings of a response until it is completed. | ss.mss | 00.050 | |||||
| First |
| waiting before reading the response after sending a |
| request. | ss.mss | 00.100 | ||||
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| The number of |
| retries when reading the response until it is completed. | - | 4 | ||||
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| The number of retry requests in case of a communication error |
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| Comma-separated addresses of the scales which will be |
| queried. The scale address is a capital letter. In periodic data reading, the D2000 KOM process tries to communicate with all configured scales and reads the values from them. Example: A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P | - |
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I/O tags: AI
I/O tag address - number are numbers of standstands.
I/O tag value is a weight of spools measured on the entered standsspecified stand.
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- July 8, 2015 - added the parameters of the station were extended
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- Ver. 1.1 – February 88th, 2000 – updating of the document
- Ver. 1.2 - July 88th, 2015 - revision and updating
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