Safety Reaction Time For Safety Distance - Omron 1 S Series User Manual

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Safety Reaction Time for Safety Distance

Safety reaction time (Safety response performance) is the maximum time required for cutting off out-
puts with consideration for failures and breakdowns in safety chain
safety distance can be calculated from the safety reaction time. In all segments of the safety chain, the
maximum time length, from safety sensor/switch input to actuator response time, must satisfy the
required specification.
*1. Safety chain means a logical connection to achieve safety functions linking from safety input equipment to
safety output equipment through Safety Controller.
The safety reaction time is the sum of following items: (a) Safety Sensor/Switch response time, (b)
Safety Input Unit/Slave response time, (c) Network response time, (d) Safety Controller response time,
(e) Safety Output Unit/Slave response time, and (f) Actuator response time. The number/time of each
item depends on the configuration of the safety chain.
As for the detail, refer to the NX-series Safety Control Unit User's Manual (Cat. No. Z930).
This section describes safety reaction time of Servo Drive.
Safety Sensor/
Switch
(a)
Safety
sensor/
switch
response time
Symbol
(e) Safety Output Unit/Slave
response time
1S-series with Built-in EtherCAT Communications and Safety Functionality User's Manual (I621)
Safety Input Unit/
Slave
(b) (c)
Safety Network
Input Unit/ reaction time
Slave
response time
Time element
The following values are the processing time of 1S Servo Drive
Advance Type:
STO: 7 ms
SS1: 7 ms + SS1 time to STO
*1
. Under the safety system design,
Safety Controller
Safety Output Unit/
(d) (c)
Safety Network
Controller reaction time
response time
Description
8 Safety Function
Actuator
Slave
(e) (f)
Safety Actuator
Output Unit/ response time
Slave
response time
8 - 11
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