Typical Reaction Times Of The Modbus Rtu Device Series - Siemens SIMOCODE pro C System Manual

15.11.3

Typical reaction times of the Modbus RTU device series

Component
Basic unit:
Thermistor:
Modbus RTU:
Current measurement:
Voltage measurement:
Active power / cos phi:
Internal ground fault:
Ground-fault module / external
ground fault
Digital modules:
24 V DC version
•
110 V - 240 V AC/DC version
•
Analog module
Temperature module
DM-F Local
DM-F PROFIsafe
1) Based upon a typical hardware set-up: Basic unit + current measuring module +
2 expansion modules
Reaction time = inputs conversion time + internal processing time + outputs conversion time
Example:
You wish to switch a relay output of the basic unit via PROFIBUS when the "remote" bit is
set:
Reaction time = 5 ms + 5 ms + 10 ms = 20 ms.
For the data from and to the PLC, you must also add the times for bus execution time, IM/CP
cycles, and PLC-CPU cycle.
You will find the corresponding information in the device descriptions
SIMOCODE pro
System Manual, 05/2019, A5E40507475002A/RS-AD/004
Time: Inputs
Set delay time
400 ms
5 ms
300 ms
300 ms
1000 ms
300 ms ... 600 ms + set delay
100 ms + set delay
15 ms + delay time
50 ms + delay time
150 ms
500 ms
≤ 75 ms + delay time
15 ms + delay time
Technical data
15.11 Typical reaction times
Time: Processing Time:
Outputs
5 ms 10 ms
-
5 ms
-
-
-
-
-
25 ms
25 ms
25 ms
-
30 ms
30 ms
.
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