Basics On The Safety Functions Integrated In The System/Drive; Monitoring Cycle - Siemens Sinumerik 840D sl Function Manual

Basics on the safety functions integrated
in the system/drive
Motion monitoring functions with a higher- -level control
The motion monitoring functions are carried out using a higher--level control. The
higher--level control and the drive are the two monitoring channels. Just like the
monitoring functions integrated in the drive, also here, each channel must be
assigned a shutdown path so that when a fault develops, the pulses can be
cancelled independently of the other channel.
S The shutdown path of the Control Unit is assigned to the drive monitoring
channel.
S The shutdown path of the Motor Module is assigned the control monitoring
channel.
5.1

Monitoring cycle

Setting the monitoring clock cycle time
The axis--specific safety--related functions are monitored cyclically in the moni-
toring clock cycle that can be set jointly for all axes/spindles using the following
machine data:
for 840D sl
MD10090 $MN_SAFETY_SYSCLOCK_TIME_RATIO
The specified clock cycle is checked and rounded--off to the next possible value
when the control boots and every time the machine data changes.
The resulting monitoring clock cycle is displayed using MD10091:
$MN_INFO_SAFETY_CYCLE_TIME
(refer to Chapter 8.1.2 "Description of machine data").
For SINAMICS S 120
p9500 SI Motion monitoring clock cycle (Control Unit)
(refer to Chapter 8.2.2, "Description of parameters")
© Siemens AG 2015 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
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