06.03
7.2 Network rules
7-210
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
7.2
Network rules
The following basic rules must be observed:
1. The bus line must be terminated on both ends. To this aim, enable the ter-
minator in the PROFIBUS DP connector of the first and of the last nodes
and disable the remaining terminators.
Notice
Only two enabled terminating resistors are permitted per bus line.
2. At least 1 terminator must be supplied with 5V voltage.
For this, the PROFIBUS DP connector with inserted terminating resistor
must be connected to a powered device.
3. No tap lines may be routed along PROFIBUS DP.
4. Each PROFIBUS node must first be connected and then enabled.
When disconnecting a node, first disable the connection, then remove the
connector.
5. The cable length of a PROFIBUS DP bus segment may be max. 100m.
Field device
SIMATIC ET200
Drive
SIMODRIVE 611
universal
Terminating resistor in
the connector enabled
ON
Drive
SIMODRIVE 611
universal
Field device
SIMATIC ET200
PROFIBUS DP
PROFIBUS DP
SINUMERIK 840Di
MCI board
PCU
(max. of 100m)
Terminating resistor in
the connector not en-
abled
OFF
ON
ON
OFF
OFF
OFF
Fig. 7-3
Example of a PROFIBUS DP network installation
Example:
PROFIBUS DP
network
installation
7 PROFIBUS DP Communication
Содержание SINUMERIK 840Di
Страница 1: ...Manual 06 2003 Edition SINUMERIK 840Di ...
Страница 2: ......
Страница 522: ...06 03 A 522 Siemens AG 2003 All rights reserved SINUMERIK 840Di Manual HBI 06 03 Edition A Abbreviations Notes ...
Страница 548: ...06 03 Index 548 Siemens AG 2003 All rights reserved SINUMERIK 840Di Manual HBI 06 03 Edition Index ...
Страница 550: ......