Siemens SINUMERIK 840D sl Function Manual page 53

03.06
Restart once the safe standstill function has been selected
1. Deselect the function in each monitoring channel via the input terminals.
2. Issue drive enable signals.
3. Cancel the power-on inhibit and power-up again.
– 1/0 edge at input signal "ON/OFF1" (cancel power-on inhibit)
– 0/1 edge at input signal "ON/OFF1" (power-up drive)
4. Move/traverse the drives again.
Status with safe standstill
The status of the safe standstill (SH) function is indicated via the following parame-
ters:
Parameter overview (see Subsection 8.2.2 "Description of parameters")
S r9772
S r9872
S r9773
S r9774
Response time for the "safe standstill" function
The following values can be specified for the response times when the function is
selected/deselected via input terminals:
S Typical response time
2x safety monitoring clock cycle CU (r9780) + inputs/outputs, sampling time
(p0799)
S Maximum response time that can occur when an error develops
4x safety monitoring clock cycle CU (r9780) + inputs/outputs, sampling time
(p0799)
Examples:
Assumption:
Safety monitoring clock cycle CU (r9780) = 4 ms and inputs/outputs, sampling time
(r0799) = 4 ms
t = 2x r9780 (4 ms) + r0799 (4 ms) = 12 ms
R_type
t = 4x r9780 (4 ms) + r0799 (4 ms) = 20 ms
R_max
Parameter overview (see Subsection 8.2.2 "Description of parameters")
S p0799
S r9780
S r9880
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
"CO/BO: SI status (Control Unit)"
"CO/BO: SI status (Motor Modules)"
"CO/BO: SI status (Control Unit + Motor Modules)"
"CO/BO: SI status (safe standstill group)"
"CU inputs/outputs, sampling time"
"SI monitoring clock cycle (Control Unit)"
"SI monitoring clock cycle (Motor Module)"
Safety Functions Integrated in the Drive
4.2 Safe standstill (SH)
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