Applied Systems Engineering ASE2000 User Manual page 36

changing "Forced Error" conditions in real time. For DNP3 protocol in RTU Simulation mode,
it also supports changing "Internal Indication" settings. Both can be altered from appropriate
Properties menu entries, accessible when communication is not active. Please refer to
descriptions in those sections.
Communication Properties
Comm Tab
The Comm Properties tab contains information controlling serial communications.
Some options apply only to ASE devices.
Channel A and B Defines the communication port(s) to use for serial protocols. Two ports are
typical for monitor mode operations, and one port for RTU or Master Simulation
mode
• RTU Simulation mode uses the To Master port for communication to the master
• Master Simulation mode uses the To RTU port for communication to the RTU,
• Line Monitoring mode expects to receive messages from the master on the To
Show ASE Ports If checked, only ports on ASE-manufactured communication equipment are
Only shown in the Ports pull-down list. If unchecked, all system COM ports are shown
Carrier Controls treatment of the RTS, CTS, and DCD signals
• Constant: In RTU and Master Simulation modes, causes the ASE2000 to assert
• Switched: On transmission, RTS is asserted before each message. The message
• Switched by RTU Only: operates in Constant mode for messages sent from
• Switched RS-485: On transmission, RTS is asserted before each message. The
Baud Rate Standard baud rates can be selected from the pull-down list. Other baud rates
can be entered manually. The BCOM-USB supports rates to 56 KB for byte
protocols and to 9600 for bit protocols
Half-Duplex The ASE2000 assumes operation over a full-duplex line, or (if half-duplex)
Filtering with half duplex equipment that squelches the receiver while the ASE2000 is
transmitting. For half-duplex circuits with no squelch capability, data transmitted
by the ASE2000 may be echoed back to the ASE2000 causing the ASE2000 to
display transmitted messages twice. Setting the Half Duplex Filtering option
may, in some cases, filter out duplicate occurrence of transmitting messages. This
option operates by discarding input data received while the transmit CTS signal is
on
ASE2000 V2 Communication Test Set User Manual
IED, or PLC
Master port, and messages from the RTU on the To RTU port
RTS on start-up and keep RTS asserted until the user ends the communication
session. (RTS is never asserted in Monitor Mode.) CTS is not checked or required
for transmission. DCD is not checked or required for reception
is sent after the Pre-Mark time has elapsed following detection of CTS. RTS is
de-asserted after the Post-Mark time has elapsed following transmission of the
last data bit. On reception, DCD is required
the master (transmission in Master Simulation mode or reception in any other
mode) and switched mode for message sent from the RTU (transmission in RTU
Simulation mode or reception in any other mode)
message is sent after the Pre-Mark time has elapsed following RTS assertion.
RTS is de-asserted after the Post-Mark time has elapsed following transmission
of the last data bit. CTS is not checked or required for transmission. DCD is not
checked or required for reception
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