Siemens S7-300 Installation Manual page 6

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1-1 Information Landscape of an S7-300 ...........................................................1-3
1-2 Additional Documentation ............................................................................1-4
1-3 SIMATIC Technical Support.........................................................................1-5
3-1 Installing an S7 system ..................................................................................3-1
4-1 Example configuration: S7-300 components .................................................4-1
5-1 Horizontal and vertical installation .................................................................5-3
5-2 Shielding contact element ..............................................................................5-5
5-3 Clearance .......................................................................................................5-6
5-4 Maximum configuration on one rack ..............................................................5-8
5-5 Full assembly using racks ............................................................................5-11
5-6 Power loss dissipated ..................................................................................5-16
5-7 S7-300 configuration with grounded reference potential
(CPU 313 - 318-2 DP) ...............................................................................5-20
5-8 S7-300 configuration with floating reference potential
(CPU 313 - 318-2 DP) ...............................................................................5-21
5-9 Configuration with isolated modules ............................................................5-23
5-10 Configuration with non-isolated modules .....................................................5-24
5-11 Grounding concept for the S7-300 with CPU 312 IFM ................................5-28
5-12 Grounding concept for the S7-300 with CPU 31 x .......................................5-29
5-13 Example: S7-300 with load power supply from PS 307...............................5-31
5-14 Example of an MPI subnet ...........................................................................5-44
5-15 Example: Maximum distance in the MPI subnet ..........................................5-45
5-16 Example of a PROFIBUS subnet.................................................................5-46
5-17 Example: CPU 314C-2 DP as MPI and PROFIBUS nodes .........................5-47
5-18 Example of PG access across network boundaries (routing) ......................5-48
5-19 Installing the terminating resistors in an MPI subnet .................................5-49
6-1 Holes for mounting the 2 m rail ......................................................................6-4
6-2 Free space required for an S7-300 installation ..............................................6-6
6-3 Inserting slot numbers in modules ...............................................................6-10
7-1 connecting the protective conductor to the rail ..............................................7-4
7-2 Setting the mains voltage selector switch for the PS 307..............................7-5
7-3 Wiring the power supply module and the CPU ..............................................7-7
7-4 Move the front connector into wiring position ..............................................7-10
7-5 Slide the labeled strips into the front panel ..................................................7-13
7-6 Shielding contact element underneath two signal modules.........................7-15
7-7 Connecting 2-wire cables to the shielding contact element.........................7-16
7-8 Bus connector: Enabled and disabled terminating resistor..........................7-18
8-1 S7-300 slots and the associated module start addresses .............................8-2
8-2 Addresses of the I/O of digital modules .........................................................8-4
8-3 I/O Addresses of a digital module in Slot 4 ....................................................8-5
8-4 I/O addresses of an analog module in Slot 4 .................................................8-6
9-1 Insert a back-up battery into CPUs 313/314 ..................................................9-6
9-2 Insert the memory card into the CPU.............................................................9-7
9-3 Connecting a PG to an S7-300 ......................................................................9-8
9-4 Connecting a PG to multiple S7 devices........................................................9-9
9-5 Connecting a PG to a subnet.......................................................................9-10
9-6 PG connected to an ungrounded S7-300 ....................................................9-11
9-7 Operation of mode selector switch for memory reset ..................................9-14
9-8 Using the mode selector switch for a cold start (CPU 318-2 DP only) ......9-15
9-9 Transfer memory in the CPUs 31x-2 DP acting as DP slave ......................9-29
9-10 Direct data exchange with CPUs 31x-2 DP .................................................9-34
10-1 Unlocking the front connector and removing the module ............................10-5
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S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01