Safety Instruction execution times

The list is the average execution times for the GuardLogix Safety Application Instructions.
Logix Designer
 application instructions were measured while enabled and operating on an enabled ladder logic rung.
Version 17 and later, Safety Application Instructions
Mnemonic
Name
Execution Time
with 1756-L6S controllers
with 1756-L7S controllers
with 1769-L3S controllers
CROUT
Configurable Redundant Output
Negative Feedback
12 µs
9 µs
14 µs
Positive Feedback
14 µs
9 µs
9 µs
DCS
Dual Channel Input - Stop
24 µs
13 µs
14 µs
DCST
Dual Channel Input - Stop With Test
26 µs
13 µs
14 µs
DCSTL
Dual Channel Input - Stop With Test and Lock
36 µs
18 µs
20 µs
DCSTM
Dual Channel Input - Stop With Test and Mute
28 µs
15 µs
16 µs
DCM
Dual Channel Input - Monitor
14 µs
8 µs
8 µs
DCSRT
Dual Channel Input - Start
20 µs
10 µs
11 µs
DCA
Dual Channel Analog Input
36 µs
16 µs
18 µs
DCAF
Dual Channel Analog Input (Floating Point)
-----
16 µs
15 µs
SMAT
Safety Mat
16 µs
10 µs
10 µs
THRSe
Two-Hand Run Station – Enhanced
44 µs
19 µs
33 µs
TSAM
Two Sensor Asymmetrical Muting
30 µs
19 µs
19 µs
TSSM
Two Sensor Symmetrical Muting
30 µs
16 µs
18 µs
FSBM
Four Sensor Bidirectional Muting
34 µs
18 µs
19 µs
Version 17 and later, Metal Form Safety Application Instructions
Mnemonic
Name
Execution Time
with 1756-L6S controllers
with 1756-L7S controllers
with 1769-L3S controllers
CBCM
Clutch Brake Continuous Mode
28 µs
15 µs
17 µs
CBIM
Clutch Brake Inch Mode
18 µs
11 µs
12 µs
CBSSM
Clutch Brake Single Stoke Mode
20 µs
13 µs
13 µs
CPM
Crankshaft Position Monitor
24 µs
14 µs
15 µs
CSM
Camshaft Monitor
24 µs
15 µs
15 µs
EPMS
Eight-position Mode Selector
24 µs
14 µs
16 µs
AVC
Auxiliary Valve Control
20 µs
10 µs
14 µs
MVC
Main Valve Control
12 µs
9 µs
8 µs
MMVC
Maintenance Manual Valve Control
20 µs
14 µs
13 µs
Version 14 and later, Safety Application Instructions
Mnemonic
Name
Execution Time
with 1756-L6S controllers
with 1756-L7S controllers
with 1769-L3S controllers
ENPEN
Enable Pendant
Auto Reset
8 µs
6 µs
6 µs
Manual Reset
10 µs
6 µs
6 µs
ESTOP
E-stop
10 µs
7 µs
7 µs
RIN
Redundant Input
10 µs
7 µs
7 µs
ROUT
Redundant Output
Negative Feedback
10 µs
6 µs
6 µs
Positive Feedback
14 µs
9 µs
9 µs
DIN
Diverse Input Auto Reset
12 µs
8 µs
9 µs
Diverse Input Manual Reset
16 µs
8 µs
8 µs
FPMS
5-Position Mode Selector
12 µs
9 µs
9 µs
THRS
Two Handed Run Station
Active Pin Enabled
16 µs
10 µs
12 µs
Active Pin Disabled
14 µs
10 µs
11 µs
LC
Light Curtain
14 µs
9 µs
9 µs
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