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VIPA System MICRO
9.2 PROFIBUS communication
PROFIBUS DP
DP slave operation
Operating mode DP slave:
Test, commissioning,
routing (active/passive)
HB400 | CPU | M13-CCF0000 | en | 18-50
n
PROFIBUS is an international standard applicable to an open and serial field bus for
building, manufacturing and process automation that can be used to create a low
(sensor-/actuator level) or medium (process level) performance network of program-
mable logic controllers.
n
PROFIBUS comprises an assortment of compatible versions. The following details
refer to PROFIBUS DP.
n
PROFIBUS DP is a special protocol intended mainly for automation tasks in a manu-
facturing environment. DP is very fast, offers Plug'n'Play facilities and provides a cost-
effective alternative to parallel cabling between PLC and remote I/O. PROFIBUS DP
was designed for high-speed data communication on the sensor-actuator level.
n
The data transfer referred to as "Data Exchange" is cyclical. During one bus cycle,
the master reads input values from the slaves and writes output information to the
slaves.
For the deployment in a super-ordinated master system you first have to project your
slave system as Siemens CPU in slave operation mode with configured in-/output areas.
Afterwards you configure your master system. Couple your slave system to your master
system by dragging the CPU 31x from the hardware catalog at Configured stations onto
the master system, choose your slave system and connect it.
There is the possibility to enable the option 'Test, commissioning, routing' in the hard-
ware configuration by means of the properties dialog of the PROFIBUS via the register
'Operating mode' at 'DP slave' . The activation affects as follows:
n
The PROFIBUS interface gets an "active" PROFIBUS node, this means it is involved
in the token rotation.
n
Via this interface you have PG/OP functions (programming, status request, control,
test).
n
The PROFIBUS interface serves as a gateway (S7 routing).
n
The bus rotation time can exceed.
When disabled, the PROFIBUS interface operates as passive DP slave with the following
characteristics:
n
The PROFIBUS interface gets an "passive" PROFIBUS node, this means it is not
involved in the token rotation.
n
Bus rotation time is not influenced.
n
S7 routing is not possible.
Option: Deployment PROFIBUS communication
PROFIBUS communication
217
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