User's Manual

Page 139
7.3.3 Wak eup comma nd
For these commands, refer to Chapter 6.
7.3.3.1 Direct w akeup : RLU c om m a nd
Transmit Command
Use the RLU command to wakeup the modem in the ULTRA mode.
Command format: ＠RLU [Destination address]CR/LF
［Destination address］designates the destination (which is in the ULTRA mode) address
(the set value of REG00 of the receiving station in the ULTRA mode). Broadcasting
wakeup request packet (address 255) is also available. When the command is accepted,
“P1” response is output and the wakeup request packet is transmitted.
Wakeup ACK and response
The modem in the ULTRA mode, up request packet, always
checks destination address regardless of the status of REG19:bit 0. Accordingly, the modem
does not wakeup unless addresses correspond to each other.
t packet and being Active mode, its modem
ss
The sender modem receives ACK from the destination station, it outputs “P0” response
nable to wakeup, ACK not received, or
fore,
nse when the RLU command is issued for
on does not return
AC tput
al
ca
re
de
destination station
which received the wake
When the modem receives wakeup reques
returns ACK packet which inform the modem has been returning to Active mode, unle
the Broadcasting wakeup (destination address: 255) is designated.
following the “P1” response. In case of being u
wrong destination address, “N1” response will output which follows “P1” response.
When REG25:bit 7 is set to be the ULTRA mode enable, the modem returns ACK to the
wakeup request packet even the modem is in the wakeup state (Active mode). There
“P1” response will output after the “P0” respo
the destination station in the Active mode.
Broadcast wakeup
When 255 is designated to [destination address] field, all receiver stati
K packet even these are being waken-up. So, as the command response, “P0” is ou
ways following “P1” output, after the defined number of retransmission count. In this
se, it is not assured whether the stations returns to the Active mode or not. It is
commended to issue TXT command (to attempt communication) and such to the
stination station, for to confirm whether ACK packet is obtained or not from the
.
Futaba Corporation Rev. 050415-01.1