Rockwell Automation 2706-F11J_F11JC_F21J_F21JC DL50 INSTALLATION MANUAL - Manual (Page 15)

Chapter 2
Introduction to the DL50
2–6
The DL50 operates in one of three modes:
•
Slave Mode. (Chapter 6)
Slave mode is the normal operating mode of the DL50. In this mode the
DL50 will accept packets of data from either the RS-232 or RS-485 port.
The DL50 supports both simplex and duplex communications.
•
Diagnostic Mode. (Chapter 8)
Use this mode if the DL50 is not functioning properly. The diagnostic
mode helps isolate faults down to a serviceable component.
•
Bootstrap Mode. (Chapter 7)
Use the bootstrap mode if the firmware needs to be updated to incorporate
new features. The DL50 may be reprogrammed using either the RS-232
or RS-485 communications ports. You may program multiple DL50s
simultaneously on an RS-485 network.
Reduced Brightness Mode
In addition to the three operating modes, the DL50 may enter a Reduced
Brightness Mode if the temperature inside the enclosure exceeds acceptable
limits (+167
_F / +75_C). In this mode, the DL50 turns on the
OVERTEMP Indicator and reduces the brightness of the display LEDs. This
reduces current consumption which reduces the amount of heat generated. If
the temperature remains too high in the reduced brightness mode, the DL50
will shut down completely. In the shutdown mode, the DL50 clears the
display leaving only the OVERTEMP LED on.
Note: If the DL50 is operated in its specified ambient temperature range and
operating conditions, the DL50 should be able to operate at full brightness.
Operating Modes