Deviating I/O Values In The Step 7 User Program - Siemens Simatic S7-1500 Function Manual

Restrictions

8.13 Deviating I/O values in the STEP 7 user program

8.13 Deviating I/O values in the STEP 7 user program
Updated values
Each value change made by a STEP 7 user program in the I/O address areas is overwritten
in the cycle control point with the updated value that was written via the API functions
Write...()
from STEP 7 for the input range.
Non-updated values
If the value was not updated via the API functions
return the value from STEP 7 for the output range.
See also
Simulate peripheral I/O (Page 68)
8.14 Multiple simulations and possible collision of IP addresses
You can simultaneously simulate multiple CPUs, but each simulated CPU interface requires
a unique IP address.
Make sure your CPUs have different IP addresses before starting the simulation.
8.15 Lacking access to an IP address
Special feature of distributed communication
If you use multiple network nodes on the same subnet through different virtual or real
adapters, the operating system may search for the node on the wrong adapter.
Remedy
Repeat your requests or enter "arp -d <IP address>" in the command line editor of Windows.
8.16 Simulation in standby mode
If your computer or programming device goes into standby or hibernation mode, the
simulation may be stopped. In this case, the communication between STEP 7 and PLCSIM
Advanced is stopped. When your computer or programming device starts up again, the
communication may need to be reestablished. In some cases, it may also be necessary to
open the simulation project again.
To prevent this situation, disable the standby mode on your computer or programming
device.
356
. The API functions
Read...()
only return this updated value and not the value
, the API functions
Write...()
Function Manual, 12/2017, A5E37039512-AB
Read...()
S7-PLCSIM Advanced