Rockwell Automation 160 RSI SERIAL COMM MODULE - Manual (Page 13)

Installation and Wiring 3–3
Setting the Protocol – SW3
As shown in the table below, SW3 sets the protocol being used (point-
to-point or multi-drop). If EPROM Mode is active (SW1 & SW2 are
On), the protocol will be read from P108 - [EPROM Protocol].
Important: If an “AIC+” is being used and “EPROM Mode” is
selected, SW3 must be set to “On.”
Selecting the Checksum Mode – SW4
Switch SW4 sets the checksum mode. Configure this mode to be
consistent with your communications and application. If EPROM
Mode is active (SW1 & SW2 are On), the checksum mode will be
read from P109 - [EPROM Checksum] (SW4 will have no effect).
Options
Switch Setting
Special Notes SW3
DF1 Point-to-Point
(Default) Off Typically used for RS-232 applications between two
devices.
DF1 Multi-Drop On Used for RS-232 applications between a number of
devices. Additional module (i.e. AIC+) is required
for RS-485 applications/networking.
Options
Switch Setting
Special Notes SW4
BCC (Default) Off Block checksum.
CRC On 16 bit algorithm.
Switch SW3
1
2
3
4
ON
Switch SW4
1
2
3
4
ON