Cypress Chameleon CTM-15X Uživatelský manuál stáhnout pdf (Strana 10)

10 Example Modem PAD Configuration

5 Example Modem PAD Configuration

5.1 Modem PAD Configuration for a SCADA Field Device in Slave Mode

In this example, a Chameleon modem is connected to a SCADA field device which is polled by a remote

server. The field device in slave mode is either connected to another Chameleon modem or has built-in

TCP/IP functionality. The field device communicates with a remote server or master device via a

request/response protocol. The slave devices will only send responses to requests sent.

The device connected to the modem’s serial port is operating at 9600 baud with no hardware flow

control (Tx, Rx, & Gnd signals only), and responds to every incoming sentence with a reply of maximum

length 50 bytes of ASCII data always terminated with the character <. The serial slave device does not

support echoing of data that it sends to the modem. The chosen listening port is 5000.

Enter the following commands from the serial console of the modem connected to the serial slave

device:

cmd factory

cmd mode 4

cmd port 9600 8 n 1 0

It will now be necessary to adjust the baud rate of the terminal application to 9600.

cmd padmode 0/1 PAD server mode: 0 = UDP, 1 = TCP

cmd padecho 0 Do not echo data sent by the slave device back on the serial port

cmd padip 0.0.0.0 Sets PAD to server mode only (default settings, in effect after cmd factory)

cmd padport 5000 Sets port on which field device will be listening for requests

cmd padfwdc 60 Decimal value of ASCII <

cmd padfwdl 51 Greater than longest message size

cmd padfwdt 20 Sets the forwarding time to 1 second idle period

(default setting, in effect after cmd factory)

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Cypress Chameleon CTM-15X Uživatelský manuál Strana 10