Setting Up Your SNAP Link Wireless Adapters SNAP Link User Guide 4
‣If a master detects another master on the same channel and network, the LED will slowly alternate
between red and amber.
The B LED indicates the USB state. Green indicates the unit is being supplied with power. It will glow
steadily in idle and will flicker when data is being transferred via the USB port.
The C LED indicates the serial interface state. If an RS-232 device is attached to the DB9F connector of the
SL232 adapter, the LED will glow steadily green in idle and will flicker as data is being transferred. If an RS-
484/422 device is attached to the terminal bock of the SL485 adapter, the LED will not glow, but will flicker
as data is being transferred.
Note:It may be difficult to differentiate an amber colored LED from one showing green or red, depending
upon your viewing angle. When viewed from above, an amber LED may look red and when viewed
from below it might look green. If in doubt, try viewing the LED at different angles.
Changing SNAP Link States
When a SNAP Link device is initially powered on, its serial communications parameters are set to factory
defaults. This initial state is called broadcast state, because at this point SNAP Link hasn’t been paired with
another unit. However, it will join and become a member of a greater SNAP mesh network. Most commonly,
each SNAP Link device will be married to, or paired with, another SNAP Link.
The factory default serial port settings for all SNAP Link devices is 9600 baud, 8 data bits, no parity, and 1
stop bit. For SL232 devices flow control is disabled, and for SL485 devices flow control is always enabled.
The SNAP network ID is set to 0x1C2C and the channel number is set to 4. Many of these can be altered
using EasySet or by using a bank of DIP switches located on the SNAP Link circuit board inside the unit, as
shown in the chapter ―Configuring your Adaptor using the DIP Switches.‖ Resetting a unit causes the SNAP
Link device to read the DIP switches and set itself accordingly.
Reset a unit, or return it to
broadcast state
Broadcast state is the initial SNAP Link state as set by the factory. To
return to broadcast state, remove power, hold down the MODE
button, then reapply power. After 5 seconds, when all LEDs are
rapidly flashing green-amber-red, release the MODE button. The B
LED will be green, signifying power. The C LED will be green only
if an RS-232 device is attached. The A LED, which signifies
broadcast state, will be off.
Pair a unit in point-to-point
While in broadcast state, hold down the MODE button for at least 5
seconds. When LED A turns red, release the MODE button. The unit
will then look for another SNAP Link to pair with, as indicated by the
LED rapidly flashing red. When it finds a partner, the A LED will
glow steadily. Green indicates a strong signal from the partner, amber
indicates a weak signal, and red indicates no signal (the partner is
powered off or else is out of range).
Note: a SNAP Link adapter will only pair with another adapter that is
also seeking a pair. So you must perform the above procedure on two
SNAP Link adapters simultaneously to form a pairing.
Back out of searching for a pair
While LED A is rapidly flashing red, hold down the MODE button
for at least 5 seconds. LED A should go dark. Release the MODE
button and the unit is now back in broadcast state.
