Cba Response Times - Siemens SIMATIC S7-400 Manual

Cycle and Response Times of the S7-400

9.11 CBA response times

9.11 CBA response times
Definition of the Response Time
The response time is the time that it takes a value from the user program of a CPU to reach
the user program of a second CPU. This assumes that no time is lost in the user program
itself.
Response Time for Cyclic Interconnection
The response time of an interconnection in an S7-400 CPU is composed of the following
portions:
● Processing time on the transmitting CPU
● The transmission frequency configured in SIMATIC iMap (fast, medium or slow)
● Processing time on the receiving CPU
You have specified a value for the transmission frequency suited to your plant during the
configuration with SIMATIC iMap. Faster or slower response times can occur because the
data transmission to the user program is performed asynchronously. Therefore, check the
achievable response time during commissioning and change the configuration as required.
9-26
S7-400 Automation System, CPU Specifications
Manual, 10/2006, 6ES7498-8AA04-8BA0