Wavetronix SmartSensor HD (101-0415) - User Guide Instrukcja Użytkownika Pobierz pdf (Strona 50)

CHAPTER 5  SETTINGS 49

 Green highlight – is indicates the communication link (port) on which SSMHD is

connected.

 RS-485 – Allows you to set the baud rate for RS-485 communication. e Response

Delay setting is used to congure how long the sensor will wait before responding to

a message received. is is useful for some communications devices that are unable to

quickly change transmission direction. e default value is 10 milliseconds.

e Termination checkbox allows you to electronically turn RS-485 communication

bus termination on or o. Only the end devices on a RS-485 bus should be terminated.

In general, the termination can be le unchecked until a multi-drop bus becomes over-

loaded.

 RS-232 – Allows you to set the baud rate for RS-232 communication. e Response

Delay setting works the same as the RS-485 section.

e HW Handshaking checkbox should be selected if you are connecting your sensor to

an RS-232 device (such as some modems). ese devices sometimes require ow control

handshaking because they cannot keep up with the data rates of higher-performance

devices like personal computers and SmartSensor HD. SmartSensor Manager HD and

SmartSensor HD have built-in support for RS-232 ow control hardware handshaking;

this support allows the SmartSensor HD and SmartSensor Manager HD to work with

these slower modem connections. Table 5.1 gives a brief description of each RS-232 line.

Line Description

TX Transmit data line

RX Data receive line

RTS Request to send ﬂow control hardware handshaking line

CTS Clear to send ﬂow control hardware handshaking line

Table 5.1 – RS-232 Lines

In order to use hardware handshaking, the sensor’s RTS and CTS signals must be properly

connected. If the Flow Control option under the Serial connection screen is set to Hard-

ware, you will not be able to connect if the sensor’s HW handshaking setting has been

previously turned o. e reason you cannot connect is that the sensor’s RTS line is not

asserted; as that line is connected to the computer’s CTS line, the computer will not forward

data messages it is given by SmartSensor Manager HD. To successfully connect, simply

change the Flow Control setting to None.

Outputs Tab

e Outputs tab contains the following settings (see Figure 5.4):

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 88 89

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