User manual - ATR121 - 17
6
Display and keys functions
2 3 4
7
8
5
6
1
6.1
Numeric indicators (Display)
1
1234
Normally displays the process.
6.2
Meaning of status lights (Led)
2 OUT1
ON when command output is active. When
it flashes, display shows the command output
setpoint (which can be modified by arrow keys).
3 OUT2
ON when alarm output is active. When it flashes,
display shows the alarm output setpoint (which
can be modified by arrow keys).
4 L1
ON when the controller communicates via serial
port.