Westermo RM-455U-D - Manual (Page 75)

455U-D Radio Modem User Manual
Page 76 © May 2010
&K1 CTS/RTS Flow Control. CTS follows RTS high if there is space in the local
buffer. Otherwise CTS goes low. On Serial Transmit, CTS goes high, and waits
for RTS to go high before transmitting. Note: Currently not implemented
(Behavior is as for &K3)
&K2 CTS/RTS Flow Control. CTS Reflects the state of the remote buffer, AND the
local buffer, AND the remote RTS input. The modem only transmits serial data
when RTS is high. RTS input is transferred to the remote modem. Note:
Currently not implemented (Behavior is as for &K3)
&K3 CTS/RTS Flow Control. CTS Reflects the state of the local buffer. Modem only
transmits serial data when RTS is high.
&K4 XON – XOFF Flow Control. Modem uses XON (Hex value 0x17) and XOFF
(Hex value 0x19) to control flow of information between modem and host.
AT&L Fixed line Mode Control. Allows configuration for answer, originate, or
command mode.
&L0
 Normal Mode. At power-up, the modem enters command mode and waits for
commands.
&L1 Fixed line mode. For Acknowledged mode, ATD automatically dials the number
stored in Z0, ATA answers an incoming call. For Unacknowledged modes, the
modem automatically goes online, and sends messages to the modem configured
in Z0.
&L2 Fixed line Answer mode. The modem continuously attempts to answer any
incoming call. Use DTR with the AT&D command to control the connection.
This mode is only allowed when operating in Acknowledged mode.
AT&M Operating Mode. This allows selection between unacknowledged and,
acknowledged mode.
&M0
 Unacknowledged Mode. All serial data is sent to the configured destination
address (In Z0 or specified in a dial command). No Acknowledgement is
required, and broadcast messages are allowed by using the wildcard address “0”.
In this mode, Messages on the RS-485 port are sent the address configured in
register &Z1. Messages on the RS-232 port are sent to the address dialed from
the command line, or configured in the auto-dial register &Z0.
&M1 Acknowledged mode. This mode simulates telephone modems, with a single
connection being made to a remote modem in the system, and each message is
acknowledged before more data is sent. If no Acknowledgement is received, the
message is re-transmitted.
&M2 Modbus RTU Mode.
&M3 Modbus ASCII Mode.
&M4 DF1 Protocol
&M5 DNP3 Protocol
AT&N Abort Connection Control. Controls whether the modem will abort a connection