11.03
2 General Information about Integrated Safety Systems
2.13 Others
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
2-53
2.13.3 Overtemperature
It must be ensured that overtemperatures in the Sinumerik/Simodrive group do
not result in subsequent malfunctions – that in turn can cause safety-critical
situations. Especially if the overtemperature condition simultaneously affects
both monitoring channels (e.g. when the ambient temperature increases), the
temperature alarm signals that are present must be evaluated in order to initiate
a safety-related response in plenty of time.
The following temperature monitoring functions are active and can be evaluated
for the subsequent response.
When the associated temperature monitoring function responds, this is
indicated using the interface signal DB10.DBX109.6 "Air-temperature alarm".
When the interface signal is set, this is in conjunction with NCK Alarm 2110
"NCK temperature alarm" or Alarm 2120 "NCK fan alarm". If the temperature or
fan monitoring responds, then it is sufficient if the PLC initiates the appropriate
measures; it is not absolutely necessary that the measures are initiated using
SPL logic.
Safety-related response required:
•
All safety-related outputs (SGAs) should be brought into the safe state
(logical "0")
•
The drives should be brought to a standstill and the pulses then cancelled
It may make sense to derive an Emergency Stop request from the interface
signal.
When the associated temperature monitoring responds, this is indicated using
the axial interface signal DB<axis>.DBX94.0 "Motor-temperature pre-alarm".
When the interface signal is set, this is associated with drive Alarm 300614
"Axis %1 Drive %2 time monitoring, motor temperature".
It is not absolutely necessary to evaluate this signal as an appropriate response
can be already activated using the associated machine data.
If required, an evaluation can also be made as part of the SI functionality.
When the associated temperature monitoring responds, this is indicated using
the axial interface signal DB<axis>.DBX94.1 "Heatsink temperature". When the
interface signal is set, this is in conjunction with drive Alarm 300515 "Axis %1
Drive %2 heatsink temperature power module exceeded".
It is not absolutely necessary to evaluate this signal as an appropriate response
can be already activated using the associated machine data.
If required, an evaluation can also be made as part of the SI functionality.
Response to an
overtemperature fault
Temperature
monitoring NCK
Temperature
monitoring, drive,
motor temperature
Temperature
monitoring, drive
heatsink temperature
