Adding Interface Modules In Step 7 - Siemens SIMATIC S7-400H Manual

11.4.9

Adding Interface Modules in STEP 7

The addition of the IM460 and IM461 interface modules, the external DP master
interface module CP443-5 Extended and the associated connecting cables is only
permitted in a deenergized state.
The power supply of the entire subsystem must be switched off. To ensure this has
no effect on the process, it must be executed when this subsystem is in STOP
mode.
Procedure
1. Change the hardware configuration offline (see Section 11.4.2)
2. Add and download the organization blocks (see Section 11.4.3)
3. Stop the standby CPU (see Section 11.4.4)
4. Download the new hardware configuration to the standby CPU (see
Section 11.4.5)
5. If you want to add to the subsystem of the present standby CPU, carry out the
following steps:
– Turn off the power supply for the standby subsystem.
– Plug the new IM460 in the central controller and establish the link to a new
expansion unit.
or
– Add a new expansion unit to an existing line.
or
– Plug in the new external DP master interface, and install a new DP master
system.
– Turn on the power supply for the standby subsystem again.
6. Switch to the CPU with the modified configuration (see Section 11.4.6)
7. If you want to expand the subsystem of the original master CPU (currently in
STOP mode), carry out the following steps:
– Turn off the power supply for the standby subsystem.
– Plug the new IM460 in the central controller and establish the link to a new
expansion unit.
or
– Add a new expansion unit to an existing line.
or
– Plug in the new external DP master interface, and install a new DP master
system.
– Turn on the power supply for the standby subsystem again.
8. Switch to redundant system mode (see Section 11.4.7)
9. Modify and download the user program (see Section 11.4.8)
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07
Modifying the System During Operation
11-31