Profibus Communication - Siemens SITRANS F M Intermag 2 Operating Instructions Manual

Operation
5.4

PROFIBUS Communication

SITRANS FM Intermag 2 Flow Transmitter
Operating Manual - A5E00102775-03
The following functions of the standard device (with 20 mA/HART
interface) are not offered in the PROFIBUS version
(7ME5033-1xxxx) because they are covered indirectly by the
PROFIBUS function:
S
Analog output (4 to 20mA)
S
HART communication
S
Digital output 2 (relay output)
The SITRANS FM Intermag 2 has a PROFIBUS-PA connection
compliant with IEC 1158 (synchronous transmission) which transfers
data at a fixed speed of 31.25 kBit/s. The min. TSDR at startup is 11
bit times and can then be changed using the "Set_Prm" service. The
bus address has the value 126 in the as-delivered state and can be
changed either with the DP service "Set_Slave_Add" or on the local
operating unit (menu 4.1.1).
Communication via PROFIBUS takes place with the EN50170
standard (PROFIBUS DP and DP V1).
The data traffic and the data formats are described in the following
sections.
The following DP services are supported as slaves for a class 1
master:
S
Data_Exchange
S
Rd_Inp
S
Rd_Outp
S
Set_Prm
S
Chk_Cfg
S
Slave_Diag
S
Set_Slave_Add
S
Global_Control
S
Get_Cfg
The following DP V1 services are supported as slaves for a class 2
master DP V1 services supported as slaves:
S
MSAC2_Initiate (Indication and Response)
S
MSAC2_Abort (Request, Indication und Response)
S
MSAC2_Read (Indication und Response)
S
MSAC2_Write (Indication und Response)
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