Z1: NC/PLC interface signals
19.1 Various interface signals and functions (A2)
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
1615
DB10
DBX109.6 Air temperature alarm
Edge evaluation: no Signal(s) updated: Cyclic
Signal state 1 The ambient temperature or fan monitoring function has responded.
This may be due to the following causes:
• The temperature monitoring has identified an ambient temperature that is too high (approx. 60
°C). Alarm 2110 "NCK temperature alarm" is output.
• The speed monitoring of the 24 V DC fan used to cool the module has responded. Alarm 2120
"NCK fan alarm" is output.
Measures: Replace the fan and/or ensure that additional ventilation is provided.
When a temperature or fan error responds, a relay contact (terminal 5.1, 5.2 or 5.1, 5.3) in the
infeed/regenerative feedback unit is activated which can be evaluated by the customer.
Signal state 0 Neither the temperature monitoring nor the fan monitoring has responded.
Application
example(s)
Appropriate measures can be initiated by the PLC user program if the temperature or fan monitoring
is activated.
Corresponding to ... When a temperature or fan error responds, a relay contact (terminal 5.1, 5.2 or 5.1, 5.3) in the
infeed/regenerative feedback unit is activated. This can be evaluated.
Additional references /DA/ Diagnostics Manual
DB10
DBX109.7 NCK battery alarm
Edge evaluation: no Signal(s) updated: Cyclic
Signal state 1 The NCK battery voltage monitoring function has responded.
This may be due to the following causes:
• The battery voltage is within the pre-warning limit range (approx. 2.7 to 2.9 V). Alarm 2100 "NCK
battery warning threshold reached" has been triggered.
Refer to References for effects and measure.
• The battery voltage is below the pre-warning limit range ( ≤ 2.6V).
Alarm 2101 "NCK battery alarm" is signaled in cyclic operation.
Effects: A supply voltage failure - e.g. when the control is switched off - would result in the loss of
battery-buffered data (e.g. part program memory, variables,machine data ...).
Measure: Refer to additional References.
• When the control ran-up, it was identified that the battery voltage was below the pre-warning
limit range ( ≤ 2.6V).
Alarm 2102 "NCK battery alarm" is output; NC ready and mode group ready are not issued.
Effects: Some of the batterybuffered data may already have been lost!
Measure: Refer to additional References.
Signal state 0 The battery voltage is above the lower limit value (normal condition).
Special cases,
errors, ...
The NCK batteries should only be replaced while the NC is switched on to avoid data loss because
of no memory backup.
Additional references /DA/ Diagnostics Manual
/IAD/ SINUMERIK 840D/611D, Installation and Startup Guide
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