Mounting the CP 440
4
4.1 CP 440 slots
Introduction
There are no specic slots reserved for communication modules in the rack of the S7-400
automation system.
Positioning the CP in the Rack
The communication processor can be plugged into any slot in the rack, with the following
exception:
In all racks the power supply module occupies slots 1 to 3 depending on the width.
Further Information
Additional information about the topic of racks is available in the installation manual S7-400,
Automation Systems, Installation.
4.2 Mounting and Dismounting the CP 440
Introduction
When mounting and removing the CP 441, you must observe certain rules.
Tool
You will need a 3.5 mm cylindrical screwdriver to mount or dismount the communication
processor.
Note
The CP 440 can be hot-plugged and hot-pulled, in other words with voltage applied. This means
that the CP 440 can be replaced while the programmable logic controller is in operation. To avoid
the CPU going into STOP, OB 83 (insert/remove interrupt) and OB 122 (I/O access error) must be
programmed. CP 440 is congured automatically when it is plugged in. The CP 440 then resumes
operation.
Point-to-point connection CP 440 Installation and Parameter Assignment
Equipment Manual, 03/2022, A5E00057742-AE 53
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