Cypress Chameleon CTM-15X Instrukcja Użytkownika Pobierz pdf (Strona 12)

12 Example Modem PAD Configuration

cmd port 19200 8 n 1 2

It will now be necessary to adjust the baud rate of the terminal application to 19200.

cmd padmode 4/5 PAD client, persistent mode: 4 = UDP, 5 = TCP

cmd padecho 1 Echo data sent by the master device back on the serial port

(default setting, in effect after cmd factory)

cmd padip 100.100.1.2 Sets IP address of field device being polled

cmd padport 5000 Sets port of field device being polled

cmd padfwdc 0 No forwarding character

cmd padfwdl 101 Greater than longest message size

cmd padfwdt 10 Sets the forwarding time to 0.5 seconds idle period

cmd padsvct 15 0 Set connection timeout to 15 seconds, maximum connection timer is disabled

(default settings, in effect after cmd factory)

cmd save Save configuration to modem’s non-volatile memory

cmd pwrmode 2 Power cycle

5.3 Modem PAD Configuration for a SCADA Master Device Polling Multiple

Field Devices in Slave Mode

In this example, a Chameleon modem is connected to a programmable master device intended to poll

multiple field devices in slave mode. The master device is typically a server running a custom SCADA

application and communicates with field devices via a request/response protocol. The slave devices will

only send responses to requests sent.

The modem is connected to a master device at baud rate of 19200 with full hardware flow control. It

receives sentences on its serial port of maximum length 100 bytes (with no common end character) which

are to be sent to multiple slave units at IP addresses 100.100.1.1-100.100.1.10, port 5000. The slave

devices typically respond within 8 seconds. The serial master device requires echoing of data that it sends

to the modem. In this example, the master device requires built-in scripting functionality to perform

predefined actions based on serial port output when in command mode.

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Cypress Chameleon CTM-15X Instrukcja Użytkownika Strona 12