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Supported device types and versions
Communication line configurati=
on
Communication station c=
onfiguration
I/O tag configuration<=
/a>
Literature
Changes and modifications
Document revisions
This protocol is used to read the weighted values from scales produced b=
y ALYA Poprad. It can be used only when a single scale is connected to a li=
ne since it does not contain addressing of the scale.
For communication with more scales, the ALYA SPOOL protocol may be used.
Note: to get the communication started with a specific = device, the DTR and RTS signals had to be set to ON, ther= efore the SerialOverUDP Device Redundant communica= tion line together with a MOXA NPort-5110 serial server set to the UDP mode= could not be used (the UDP mode does not support the setting of DTR and RTS signals to a fixed value). Instead, the MOXA NPort-5110= serial server had to be switched to a Real COM mode and a Serial l= ine had to be configured.
Communication station - configuration dialog box - "Proto=
col parameters" tab.
They influence some of the optional parameters of the protocol.
Table 1
Keyword | 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 a response after sending the re= quest. | ms | 100 millisec. |
MWR
|
Max Wait Retry | The number of response reading retry until it is= completed. | - | 6 |
RC
|
Retry Count | The number of request retries if a communication= error occurs. | - | 2 |
Possible I/O tag types: AI
Addresses of I/O tags:
Note: If a scale sends a message, which means that the = platform is not stabilized yet, the NET and T= ARA I/O tags will have invalid values.
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Related pages: