Instructions

UM-0085-B09 DT80 Range User Manual Page 273
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Resetting the DT80
The DT80 can be reset in the following ways:
• soft reset – clears current job and resets parameters and switches
• hard reset – restarts DT80 firmware
• safe mode reset (a.k.a. triple push reset) – restarts DT80 firmware and runs using factory default settings.
Soft Reset
The INIT command performs a soft reset, which has the following effects:
• The message Initializing... is returned
• The current job is cleared, i.e. all schedule and channel definitions are cleared
• All span/polynomial definitions are cleared
• All CVs are reset to 0.0
• All parameters and switches are reset to their power-on default values, as specified in the associated profile
settings
• All digital outputs are reset to their default state
• All counter channels are reset to 0
• All Modbus definitions set using the
SETMODBUS command are cleared
• All serial port settings set using
PH= and PS= revert to the settings specified in the profile
• The modem dialout number set by
SETDIALOUTNUMBER is cleared
• A self-calibration is performed
A soft reset is analogous to closing and restarting an application on a PC.
Hard Reset
A hard reset causes all DT80 hardware to be physically reset, and the DT80 firmware will be restarted. A hard reset may
be caused by:
• the
HRESET command
• pressing the manual reset button (by inserting a straightened paper clip into the small hole between the
Ethernet and USB connectors)
• applying power following a complete loss of power (e.g. external power disconnected and the battery link is not
in place, or the main battery is completely flat)
• applying power after the DT80 entered forced sleep mode due to battery voltage dropping below power fail
threshold.
• the DT80 detecting a critical error such as a serious hardware fault, or an internal inconsistency in the firmware.
In these situations a hard reset is forced in order to try to return the DT80 to a stable operational state.
A hard reset is analogous to rebooting a PC.
A hard reset has the following effects:
• All TCP/IP (Ethernet or PPP) connections are terminated.
• USB connection is terminated if power was lost or the reset button was pressed.
• All communications and other settings are read from the profile and applied.
• All LEDs flash rapidly four times.
• If the reset was due to a power failure, manual reset button or critical error, then a message is displayed on the
LCD (e.g. DT80 restarted / Power loss) and the Attn LED starts flashing.
• A sign-on message e.g. dataTaker 80 Version 8.00 is returned. (This can be disabled if required by
switching off the messages flag in the startup profile, i.e.
PROFILE SWITCHES M=OFF)
• A soft reset is performed, as described in the previous section.
• If the
STARTUP / MAINTAIN_OUTPUTS profile is set to YES then all digital outputs are restored to the state
they had prior to the reset.
• The job that was running prior to the reset is re-loaded, and becomes the current job. Alternatively, a particular
job or no job at all may be loaded by setting the
STARTUP / RUN profile.
Note: A hard reset may take a few seconds to perform. You should refrain from sending further commands to the DT80 during this time.