Siemens SINUMERIK 840D Description Of Functions page 189

02.99
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Explanation
Reaction
Remedy
To continue
program
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SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
Axis %1, drive %2, no sign of life from NC
%1 = NC axis number
%2 = drive number
With the controllers enabled, the NC must update its sign of life in every position
controller cycle. The sign of life has not been updated in the event of a distur-
bance.
Cause:
a) NC no longer updates its sign of life in reaction to an alarm
(e.g. 611D alarm)
b) Fault in communication link via the drive bus
c) Hardware fault on drive module
d) NC fault
e) On 840D: Setting in machine data MD10082:
MN_CTRLOUT_LEAD_TIME (offset in setpoint transfer time)
is too high
The alarm can be reconfigured in MD 11412: ALARM_REACTION_CHAN_NO-
READY (channel not ready).
Mode group not ready
Switchover for entire channel via MD might be possible.
Channel not ready.
NC Stop in response to alarm.
NC Start disable.
The NC switches to follow-up mode.
Alarm is displayed.
Interface signals are set.
Please inform authorized personnel/service engineer.
Re: a) Check whether the sign of life failure is a secondary error. A secondary
error is defined, for example, as:
fault / alarm on axis x in an n-axis configuration. If the error
is of this type, then the above error message is signalled for all n axes,
even though the fault / alarm applies only to axis x.
==> Eliminate cause of error on axis x
==> Sign of life of other axes is irrelevant
Re: b) Check plug-in connections, take measures to suppress RI (check
shielding, ground connections)
Re: c) Replace closed-loop control module
Re: d) See NC error diagnosis, replace NC hardware if necessary
Re: e) Set machine data 840D MD10082: CTRLOUT_LEAD_TIME
(offset in setpoint transfer time) to correct value using
machine data MD10083: CTRLOUT_LEAD_TIME_MAX
(maximum settable offset in setpoint transfer time).
Switch control system OFF and ON again.
6 Hydraulics Diagnostics
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