Siemens SIMATIC Compact FF Link - System Modification During Operation

10.3 System modification during operation
Adding a bus link with Compact FF Link
Perform the following steps in order to add a bus link and lower-level FF segment to an existing
system during operation.
1. Install the new bus link.
2. Connect the voltage supply of all modules,
3. Establish the PROFIBUS connection:
– In non-redundant mode:
Connect the Compact FF Link to the DP master system that is connected to the CPU
of the the S7-400H.
– In redundant mode:
Connect the left Compact FF Link to the S7-400H via the DP master system that is
connected to the left CPU or Rack 0.
Connect the right Compact FF Link to the S7-400H via the DP master system that is
connected to the right CPU or Rack 1.
Information regarding the complete procedure for a system modification and related
requirements can be found in the following documentation:
● Modifying the system during operation via CiR (
http://support.automation.siemens.com/
WW/view/en/14044916)
● Firmware update of the Compact FF Link (Page 50)
● S7-400H Fault-Tolerant Systems (http://support.automation.siemens.com/WW/view/en/
1186523), section System modification during operation, step "Modification of hardware".
To use a Compact FF Link that has been previously used in another system, you must first
restore it to its factory settings.
Information regarding this can be found in section "Restoring a Compact FF Link FF to the
factory state (Page 51)".
Adding an FF device
Information on adding a new FF device to an existing system during operation can be found
in the following documentation:
● Section "Connecting (Page 33)":
● Operating Instructions DP/PA coupler, Active Field Distributor, DP/PA Link, and Y Link
(http://support.automation.siemens.com/WW/view/en/1142696).
Information on configuring can be found in the following documentation:
● Process Control System PCS 7, FOUNDATION Fieldbus (http://www.siemens.com/pcs7-
documentation) Commissioning Manual.
Functions
10.3 System modification during operation
Compact FF Link
Operating Instructions, 03/2015, A5E35651552-AA 55