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The ASCII Client/Server protocol is intended for parsing serial communication containing simple text-oriented data (data sentences) that conform to a template
StartMark Data1 Separator Data2 Separator .... DataN EndMark
Parameters StartMark, Separator and EndMark parameters can be configured within the station address.
It is also possible to periodically transmit text-oriented data with an identical template - with the fact that the . The StartMark, Separator and EndMark parameters for transmission can be different from those for reception.
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Note: StartMark, Separator and EndMark parameters can also contain special (control) characters in symbolic form, e.g. <CR> or <LF>. The following table lists the supported characters:
Table 1
| Symbolic form | Character | ASCII value |
|---|---|---|
<NUL> | NUL | 0 |
<SOH> | SOH | 1 |
<STX> | STX | 2 |
<ETX> | ETX | 3 |
<EOT> | EOT | 4 |
<ENQ> | ENQ | 5 |
<ACK> | ACK | 6 |
<BEL> | BEL | 7 |
<BS> | BS | 8 |
<HT> | HT | 9 |
<LF> | LF | 10 |
<VT> | VT | 11 |
<FF> | FF | 12 |
<CR> | CR | 13 |
<SO> | SO | 14 |
<SI> | SI | 15 |
<DLE> | DLE | 16 |
<DC1> | DC1 | 17 |
<DC2> | DC2 | 18 |
<DC3> | DC3 | 19 |
<DC4> | DC4 | 20 |
<NAK> | NAK | 21 |
<SYN> | SYN | 22 |
<ETB> | ETB | 23 |
<CAN> | CAN | 24 |
<EM> | EM | 25 |
<SUB> | SUB | 26 |
<ESC> | ESC | 27 |
<FS> | FS | 28 |
<GS> | GS | 29 |
<RS> | RS | 30 |
<US> | US | 31 |
<SPACE> | SPACE | 32 |
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The following station parameters can be set:
Table 2
| Full name | Description | Unit | Default value | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Waiting between data readings. | sec | 0.2 | ||||||
| Maximum reading time of one data sentence (if data input is enabled in the station configuration). | sec | 5 | ||||||
| Data transmission period (if transmission is enabled in the station configuration). | sec | 60 | ||||||
| If the SerialOverUDP Device Redundant communication line is used, on which two serial servers are configured (e.g. Moxa NPort), the parameter specifies a timeout after which the redundant serial servers will be switched in the event of a communication error (if no data is received within this time limit). | sec | 120 |
| Kotva | ||||
|---|---|---|---|---|
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