Siemens SIMATIC S7-200, Системное руководство

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Getting started
2.1 Connecting to the CPU
S7-200 SMART
38
System Manual, V2.3, 07/2017, A5E03822230-AF
The "Communications" dialog provides two methods of selecting the CPU to be accessed:
● Click the "Find CPUs" button to have STEP 7-Micro/WIN SMART search your local
network for CPUs. The RS485 network address of each CPU found on the network is
listed under "Found CPUs".
● Click the "Add CPU" button to manually enter the access information (RS485 network
address and baud rate) for a CPU that you wish to access. The RS485 network address
for each CPU, manually added with this method, is listed under "Added CPUs" and is
retained.
For "Found CPUs" (CPUs located on the RS485
network), use the "Communications" dialog to
connect with your CPU:
•
Select "PC/PPI cable.PPI.1" for your Commu-
nication Interface.
• Click the "Find CPUs" button to display all
operational CPUs ("Found CPUs") on the
RS485 network. All CPUs default their RS485
network settings to address 2 and 9.6 Kbps.
•
Highlight a CPU, and then click "OK".
Note: You can open multiple copies of
STEP 7-Micro/WIN SMART on a computer. Be
aware that when you open a second copy of
STEP 7-Micro/WIN SMART or use the "Find
CPUs" button in either copy, the communication
connection to the CPU in your first/other copy of
STEP 7-Micro/WIN SMART might be disconnect-
ed.
For "Added CPUs" (CPUs on the RS485 network),
use the "Communications" dialog to connect with
your CPU:
• Select "PC/PPI cable.PPI.1" for your Commu-
nication Interface.
•
Click the "Add CPU" button.
• Enter the RS485 network address and baud
rate of a CPU that you wish to access directly
on the RS485 network.
You can add multiple CPUs on the RS485
network. As always, STEP 7-Micro/WIN
SMART communicates with one CPU at a
time. All CPUs default their RS485 network
settings to address 2 and 9.6 Kbps.
•
Highlight a CPU, and then click "OK".