Siemens Simatic S7-300 CPU 31xC Series User Manual

Commissioning
8.4 Commissioning the Modules
S7-300, CPU 31xC and CPU 31x: Installation
8-18 Operating Instructions, Edition 08/2004, A5E00105492-05
The figure below shows an RS485 repeater as interface between grounded and ungrounded
nodes of an MPI subnet.
Bus segment 2
(ungrounded signals)
PG
Bus segment 1
(grounded signals)
CPU
PS
See also
PROFINET cable lengths and network expansion (Page 4-54)
Network components of MPI/DP and cable lengths (Page 4-35)
8.4.6 Starting SIMATIC Manager
Introduction
SIMATIC Manager is a GUI for online/offline editing of S7 objects (projects, user programs,
blocks, hardware stations and tools).
The SIMATIC Manager lets you
• manage projects and libraries,
• call STEP 7 tools,
• access the PLC (AS) online,
• edit Memory Cards.
Starting SIMATIC Manager
After installation, the SIMATIC Manager icon appears on the Windows desktop, and the Start
menu contains entry SIMATIC Manager under SIMATIC.
1. Run SIMATIC Manager by double-clicking the icon, or from the Start menu (same as with
all other Windows applications).
User interface
A corresponding editing tool is started up when you open the relevant objects. You start the
program editor by double-clicking the program block you want to edit (object-oriented start).

Siemens Simatic S7-300 CPU 31xC Series Specifications

General

Series	S7-300 CPU 31xC
Power Supply	24 V DC
Communication Interfaces	MPI, PROFIBUS DP
Programming Languages	LAD, STL, FBD, SCL
Operating Temperature	0°C to +60°C
Memory	48 KB - 512 KB
Dimensions	40 x 125 x 130 mm (varies by model)