
Communication Services
4-9
SIMATIC 505 PROFIBUS-FMS CP User Manual
Figure 4-4
shows the data flow of each FMS communication job. Each FMS
communication job is configured in the shaded module.
Read
(name or index)
Read response (data)
Data
Flow
Local
Station X
FMS CP
FMS CP
CPU
CPU
Client
Data to memory
Remote Station
Y
Server
Data from memory
Read
Job
Data stored in a remote
source is read by the client
FMS CP module, and stored
in a specified local memory
address. The remote source
must be specified by a
variable name or an index.
READ
Write
(data)
Data
Flow
Local
Station X
FMS CP
FMS CP
CPU
CPU
Client
Data from memory
Remote Station
Y
Server
Data to memory
Write
Job
Data stored in the local
station is written to a
specified variable name or
index in a remote station by
the client FMS CP module.
The local address source of
the data must be specified.
WRITE
Information
Report (data)
Local Station X
FMS CP
FMS CP
CPU
CPU
Client
Data to memory
Remote Station
Y
Server
Data from memory
Information Report Job
Data is transferred from a
variable name or index in
the server station to a
variable of the same name
or index in the client. (This is
an unacknowledged job.)
INFORMATION REPORT
Status
Request
Status Information
Data
Flow
Local
Station X
FMS CP
FMS CP
CPU
CPU
Client
Data to memory
Remote Station
Y
Server
Status Data
Status
Job
Status information is
transferred from a remote
network station and stored
in a specified local memory
address by the client
FMS CP module.
STATUS
Identity
Request
Identity Information
Data
Flow
Local
Station X
FMS CP
FMS CP
CPU
CPU
Client
Data to memory
Remote Station
Y
Server
Identity Data
Identify
Job
Identity information is
transferred from a remote
network station and stored
in a specified local memory
address by the client
FMS CP module.
IDENTIFY
Acknowledge
Data Flow
Job
Job
Job
Job
JobJob
Figure 4-4 FMS
Communication Jobs
FMS Jobs
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