Siemens SIMATIC PCS 7 Operating Manual page 153

Input/Output
Depending on the hardware configuration of the system, 5 variants are possible here. In
terms of the input and output, the variants are exactly the same, with the sole exception that
the blocks for the output are in the reverse sequence to those for the input.
You will need the following parameters for the calculation:
T
Sensor_DLY
T
DIS
T
WCDT
T
OFDT
T
DAT
T
PSTO, configured
T
Slave
T
TR/TR1
T
TR2
T
DPPA_L_DLY
T
Y_L_DLY
T
DP_DLY
T /T
Sensor_DLY Actuator_DLY
The delay times in the table are assumed to be 100 ms in each case; if necessary, the
values for these will need to be obtained from the device data sheets.
Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB
/T Delay time of sensor or actuator
Actuator_DLY
Maximum discrepancy time
Worst Case Delay Time
Maximum response time when no errors are present
One Fault Delay Time
Maximum response time when an error is present
Maximum acknowledgment time of the fail-safe I/O module in safety
mode (F signal module group data sheet)
Configured PROFIsafe monitoring time
Maximum delay time with IM 153-2 (typical value for ET 200M = 1 ms)
Maximum target rotation time for the DP master system
Maximum target rotation time for the subordinate DP master system on
the Y link, or maximum target rotation time for the subordinate PA master
system on the DP/PA coupler
Delay time with a DP/PA link
Delay time with a Y link
Additional delay time with external DP interface (via CP 443-5 Extended)
parameters
Configuring the safety program
7.11 Monitoring times and system response times
153