Omron E3X-DRT21 Operation Manual page 69

CompoBus/S Communication Unit Part Names and Functions
Sensor Reset Switch
58
Pin 2: Communications Mode
This pin selects the CompoBus/S communications mode.
Pin 2 (DR) Communications mode
OFF High-speed mode
ON Long-distance mode
Reserved for System Use (Pins 3 and 4)
These pins must always be OFF.
Press this switch to reset the connected Sensors by executing power interrup-
tion processing. This switch is used in the following case.
If the number of Sensors with communications enabled does not match the
number of Sensors connected, one or more Sensors may have become dis-
connected. The power reset switch is required to enable the Sensors to be
reconnected properly and for communications to be reestablished between
Sensors. Turning OFF the power supply would disconnect the Fiber Amplifier
Sensor Communication Unit from CompoBus/S, which may effect the entire
system. The Sensor reset switch is thus used to reestablish communications
with the Sensors.
Section 3-2