February 2020 – TD 266 OPERATING MANUAL – ZPulse® DCS 4420/4830/4520/4930 Page 41
Interface is the interface between sensor and PC used for configuration. 4420, 4520, 4830 and 4930 are using RS-232
when 4420R, 4520R, 4830R and 4930R are using RS-422. RS-422 sensors can be used with longer cables.
Baudrate is the speed of communication via the serial port. The default setting from factory is 9600. If the sensor is
going to be used on longer cables it may be necessary to lower the baud rate but then also the transmission time will
increase.
Flow Control is used to control the transmission speed between two units. Available settings are None and Xon/Xoff.
Default setting is Xon/Xoff. The Xon/Xoff’ characters are also sent for each Doppler ping measurement. To remove the
“disturbance” on the receiver, select None. Be aware that this may also lead to missing characters when sending
commands to the sensor.
Enable Comm Indicator is enable communication sleep (’%’) and communication ready (‘!’) indicators. After the last
communication with the sensor, it normally outputs a ‘%’ when the Comm Timeout time is over. When a character is
sent to the sensor, it outputs a ‘!’ to indicate that it is ready to communicate. If this setting is disabled the sensor will not
send any indicators.
Comm Timeout is the time communication is active (Always On, 10 s, 20 s, 30 s, 1min, 2 min, 5 min, 10 min). A
short time means that the sensor is going to sleep faster after a communication input.
Enable Old Wakeup Character. Enables old wakeup character `#`instead of `!`. Use Enable Comm Indicator to
switch on and off these characters.
2.6.4 Backward Compatibility
Figure 2-27: Backward Compatibility
Backward Compatibility Settings are used to change output format to be compatible with some of the older version
sensors.
Enable 4100 Output is used to set output string to be compatible with the older version of in-line DCS 4100 and 4100R.
Select 4100 Output Mode is used to select the 4100 output string. Available settings are: Normal-Polar, Normal-
Rectangular, Comprehensive-Polar or Comprehensive-Rectangular. Only available if Enable 4100 Output is set.
Exchange Temp with SP Std Dev Exchange the Temperature reading with Single Ping Standard Deviation in the
output string, to be used with 4100 Output mode.
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