Configuration
9.9 Display of the IO device assignments in STEP 7
S7-1500R/H redundant system
312 System Manual, 01/2024, A5E41814787-AF
Reference
Calculation of the PROFIsafe monitoring time
For the calculation of the PROFIsafe monitoring time you will find the times RDHT [ms] and
MTOT [ms] in the right area of the "I/O communication" view.
Figure 9-16 Display of time information RDHT and MTOT
Time information RDHT: Redundancy Data Hold Time. RDHT indicates the time duration, how
long the outputs of an IO device are not updated during AR switching before the IO device
fails.
Time information MTOT: Maximum Take over Time. MTOT indicates the time duration how
long the inputs of an IO device are not updated during AR switching before the IO device
fails.
Valid values for RDHT and MTOT are only displayed after you have compiled the STEP 7
project. If you change the hardware configuration afterwards, you have to recompile the
project. After the compile STEP 7 shows valid values again.
For more information, refer to the following entry on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/93839056) and in the SIMATIC Safety -
Configuring and Programming
(https://support.industry.siemens.com/cs/ww/en/view/54110126) programming and
operating manual.
To Next Page
Loading...
