D-Link DSA-3200 Bedienungsanleitung PDF herunterladen (Seite 5)

DSA CONTROL AND CONFIGURATION

The operation of each DSA is controlled by sending commands to units selected by network addressing via

the network. The DSA returns any data or information over the network to the requesting client/host.

The section on DSA Commands lists each command and explains its function.

DSA COMMANDS

This section describes the commands used to control the DSA.

The DSA software must run as embedded software on the DSA 3017 pressure scanner hardware. It is to

perform the following general tasks:

1) Read and filter the raw A/D counts that represent pressure and temperature.

2) Convert the pressure A/D counts to user chosen pressure units.

3) Receive and execute commands from the Ethernet Link.

4) Allow the configuration to be saved through power down.

5) Output converted data, status, setup and calibration data over the Ethernet Link.

6) Set the DSA Physical Ethernet Address(MAC Address).

7) Protocol to be TCP/IP or User Defined Protocol.

8) Support the user in troubleshooting the DSA hardware and system.

When a DSA module is in a “not ready” mode, all commands are disabled except STATUS and STOP.

TCP/IP does not guarantee that packet boundaries will be maintained between a Host and a DSA module.

Therefore, ALL commands from a Host MUST be term inated properly with one of four options. The DSA will

detect and adjust to the termination option being used by a Host.

The four options are:

CR (ASCII 13)

LF (ASCII 10)

LF-CR (ASCII 10 - ASCII 13)

CR-LF (ASCII 13 - ASCII 10)

The current DSA RS232 interface includes error checking. A checksum byte is generated and added to the

end of the serial data packet. It is assumed that data will be transmitted in ASCII format. Data may be

transmitted in BINARY format. If data are to be transmitted in BINARY format, then page mode transmission

must be disabled.

Prior to version 1.08, the software would not attempt to output data is the sensor temperatures were less than

0 degrees C. Version 1.08 allows data output at temperatures below 0 degrees C. In this case, the EU

conversion will use the last good set of coefficients. No errors will be logged. If this condition might exist,

a user must monitor the sensor temperatures in the data output.

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D-Link DSA-3200 Bedienungsanleitung Seite 5