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2 Instrument description
2.4 Digital signals
Signal types In addition to the seven logic inputs, digital signals also include those
generated by the instrument itself:
Digital signal Description
Logic input 1 — 7 Seven logic inputs present in hardware (extra
code)
Alarm group 1 — 6 OR combination of all limit infringements on the
channels of a group
Combination alarm OR combination of all group alarms
Logged in The signal is set when a user is logged in.
Error Alarm when the battery is empty, or the time has
to be set.
v Chapter 3.7 “Device info”
Modbus flag Control flag which can be activated through the
serial interface.
External input 1 — 6 External inputs which can be programmed via the
serial interface, or which are available in the form
of the modules in the “JUMO mTRON automation
system” series (extra code).
CF plugged in The signal is set when a CompactFlash memory
card is inserted in the recorder.
Stolen CF The signal is set when the CompactFlash memory
card is removed and no user is logged in.
Int. mem. alarm/CF The alarm is triggered when the available backup
memory has fallen below a certain value
(configurable). The signal should only be
evaluated if the measurement data are read out
via the external CompactFlash memory card.
v See “(memory display)” on page 73.
Int. mem. alarm/ser. The alarm is triggered when the available backup
memory has fallen below a certain value
(configurable). The signal should only be
evaluated if the measurement data are read out
through the interface.
v See “(memory display)” on page 73.
Mem. al. CF card The alarm is triggered when the available memory
of the external CompactFlash memory card has
fallen below a certain value.
v Chapter 3.6 “CompactFlash card”
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