Siemens SINUMERIK 840D sl Function Manual page 241

05.08
Return value
status
6
7
Note
1. The SIRELAY call must be made in the NCK–SPL (program SAFE.SPF), since
the allocation of the output quantities corresponds to the write access
operations to safety system variables. If the call comes from a different
program, Alarm 17070 "Channel %1 Block %2 Data write–protected" is output.
2. The SIRELAY call must be included in a synchronized action. If this condition is
not satisfied, Alarm 12080, "Channel %1 Block %2 Syntax error for text
SIRELAY" is output.
3. If parameter x contains a value that lies outside the range 1 to 4, Alarm 20149
"Channel %1 Block %2 Motion synchronous action: Invalid index" is output.
Forced checking procedure
When the safety relay is tested, acknowledge input Q2 and one of the three dis-
able inputs (E1, E2 or E3) must be used. Q2 must be connected to a safety marker
($A_MARKERSI[ ]) and may only be briefly set (< 1s) to 1.
One of the three inputs E1 to E3 can be used (e.g. from the PLC) with a short fal-
ling edge to check that the safety relay has dropped out. The 0 signal level may
not be present for longer than the time parameterized in TM1. The maximum value
for TM1 is 1s, as otherwise the crosswise data comparison between NCK and
PLC–SPL would detect an error.
Acknowledge input Q2 can only be used if the measured time t4 is shorter than
TM1. This prevents a queued shutdown operation being acknowledged externally
via the test acknowledge input. If A0 is 1 at the time of the falling edge of E_AND
(= ANDing of E1, E2 and E3), time t4i (refer to Figure 7-23) is allocated the mea-
sured time t4. For additional measurements, while A0 remains at 0, t4i is only re–
saved if the measured time t4 is greater than the old value of t4i.
© Siemens AG 2008 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
The output quantities of the safety relay are either not parameterized
or not correctly parameterized.
Remedy: Call SIRELOUT and SIRELTIME with the correct parame-
terization
The initialization of the safety relay was either not carried out or not
correctly carried out.
Remedy: Call SIRELIN, SIRELOUT and SIRELTIME with the correct
parameterization
Connecting Sensors/Actuators
7.3 Safe programmable logic (SPL)
Description
7-241