Omron NE1A-SCPU01 - 2006 Operation Manual page 229

Reaction Time
Reaction Time Calculation
A Local input/local output reaction time (ms) at NE1A-
SCPU01
B Remote input/local output reaction time (ms) at
NE1A-SCPU01
C Local input/remote output reaction time (ms) at
NE1A-SCPU01
D Remote input/remote output reaction time (ms) at
NE1A-SCPU01
E Input reaction time (ms) at Safety I/O Terminal
F Output reaction time (ms) at Safety I/O
Terminal
G Network reaction time (ms)
Note
Reaction Time Calculation Examples
194
3. Local Input - Remote Output
Safety sensor/
NE1A Series
switch
Local input/
Sensor/switch
remote output
reaction time
reaction
timeC (C)
4. Remote Input - Remote Output
Safety sensor/
Safety I/O Terminal
switch
Input
Sensor/switch
reaction
reaction time
time (E)
Item
If an output from a function block is fed back to the input side of the same
function block, the cycle time of the NE1A-series Controller must be added to
the reaction time for the safety chain.
Example 1: Local Input – Local Output
The following example shows calculating the reaction time from a local input
to a local output for the NE1A-SCPU01 configuration shown in the illustration.
NE1A-SCPU01 configuration:
• Program: 1 AND (2 inputs)
• Standard Slaves: 2 connections
• Safety Masters: None
• Safety Slaves: None
Switch NE1A-SCPU01
Safety I/O Terminal
Output
Network
reaction
reaction
time (F)
time (G)
NE1A Series
Remote
Network
input/remote
Network
reaction
output
reaction
time (G)
time (G) reaction
times (D)
= ON/OFF delay time + I/O refresh cycle
+ NE1A-SCPU01 cycle time
= NE1A-SCPU01 cycle time + 2.5
= ON/OFF delay time + I/O refresh cycle
+ NE1A-SCPU01 cycle time
= NE1A-SCPU01 cycle time
= ON/OFF delay time + Input reaction time
= Output reaction time
= Result of Network Configurator calculation
Cycle time = 4 ms
I/O refresh cycle = 4 ms
Actuator
DeviceNet
Section 9-4
Actuator
Actuator
reaction time
Safety I/O Terminal Actuator
Output
Actuator
reaction
reaction time
time (F)
Formula
2 + 2.5
2