User Manual

18 CompactRFTM Operating Manual: Chapter 3 Configuration Options
Refer to Appendix A (page
19) for a summary of the
modem commands
&F1
&F2
Master Slave
&F1
&F4
&F3
Master
Repeater
Slave
Z Reset and load stored configuration
The Z command resets the modem and loads the stored configuration.
&C DCD (Data Carrier Detect)
The &C command controls the modem’s DCD output signal to the host
microprocessor. This command determines when the DCD is active.
&C0 DCD is always ON
*&C1 DCD on when modems are synchronized. DCD is always
on when unit is configured as Master.
&C2 DCD used for output data framing and Modbus mode. See
page 25 for details.
&D DTR (Data Terminal Ready)
The &D command controls what action the modem performs when the DTR
input line is toggled. The DTR input is controlled by the host
microprocessor.
*&D0 DTR line is ignored
&D1 Not Supported
&D2 DTR disconnects and switches to Command Mode
&D3 DTR disconnects and resets modem. Modem will remain
in this state until DTR again goes active.
&F Load Factory Default Configuration
The &F command resets the modem and loads the default factory
configuration.
&F1 Master Point-to-Multipoint. Designed to communicate
with modems configured as &F2 or &F3.
&F2 Slave. Designed to communicate with another modem
configured as &F1.
&F3 Repeater. Designed to communicate with modems
configured as &F1 and &F4.
&F4 Slave working with factory default Repeater and factory
default Master. Communicates directly with Repeater
configured as &F3.
&K Handshaking
The &K command controls the handshaking between the modem and host
microprocessor.
&K0 Disable handshaking
&K2 RTS/CTS input data framing. See page 25 for details.
*&K3 Enable hardware handshaking (RTS/CTS)