Profibus Communication - Siemens SITRANS F TRANSMAG 2 Operating Instructions Manual

Profibus Communication

B.1 PROFIBUS Communication
The following functions of the standard device (with 20 mA/HART interface) are not offered in
the PROFIBUS version (7ME5034-1xxxx) because they are covered indirectly by the PROFIBUS
function:
• Analog output (0/4 to 20mA)
• HART communication
• Digital output 2 (relay output)
Data transfer
The SITRANS F M TRANSMAG 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.
DP services
The following DP services are supported as slaves for a class 1 master:
• Data_Exchange
• Rd_Inp
• Rd_Outp
• Set_Prm
• Chk_Cfg
• Slave_Diag
• Set_Slave_Add
• Global_Control
• Get_Cfg
TRANSMAG 2 with MAG 911/E
Operating Instructions, 03/2021, A5E00102775-AC
B
105