Siemens SINUMERIK 840Di Function Manual page 1870

Detailed Description
2.1 Various interface signals and functions (A2)
DB10
DBX109.5 Heatsink temperature alarm NCU 573
Edge evaluation: no
Signal state 1 or The limit values of the heatsink temperature were exceeded on the NCU 573.
edge change 0 → 1 The heatsink monitoring function has responded and the continuous operation of the operator
panel is no longer assured.
Signal state 0 or The heatsink monitoring function of the NCU 573 has not responded.
edge change 1 → 0
DB10
DBX109.6 Air temperature alarm
Edge evaluation: no
Signal state 1 or The ambient temperature or fan monitoring function has responded.
edge change 0 → 1
This could be due to the following:
•
•
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 or Neither the temperature monitoring nor the fan monitoring has responded.
edge change 1 → 0
Application Appropriate measures can be initiated by the PLC user program if the temperature or fan
example(s) 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.
References /DA/ Diagnostics Guide
2-6
Signal(s) updated: cyclic
Signal(s) updated: cyclic
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.
NC/PLC Interface Signals (Z1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0