Profibus Communication; Cyclic Data Transmission - Siemens SITRANS FUS060 Operating Instructions Manual

PROFIBUS communication

SITRANS FUS060 has a PROFIBUS PA connection compliant with IEC 1158 (synchronous
transmission).
The only possible baud rate is 31.25 kbits/s. The min TSDR (smallest station delay time, see
chapter below) at startup is 11 bit times and can subsequently be changed using the Set_Prm
service. The bus address has the value 126 as-delivered and can either be changed with the
Set_Slave_Add DP service or on the local keyboard (menu 4.1.1).
Communication uses the EN 50170 standard (PROFIBUS DP and DPV1). The data transmission
and data formats will be described in the following sections.
DP services
The following DP services are supported as slave for a DP master class 1:
• Data_Exchange
• Rd_Inp
• Rd_Outp
• Set_Prm
• Chk_Cfg
• Slave_Diag
• Set_Slave_Add
• Global_Control
• Get_Cfg
DP V1 services
The following DVP1 services are supported as slave for a master class 2:
• MSAC2_Initiate (indication and response)
• MSAC2_Abort (request, indication and response)
• MSAC2_Read (indication and response)
• MSAC2_Write (indication and response)
B.1

Cyclic Data Transmission

Cyclic data transmission serves for fast exchange of process data between a class 1 master
(control system or PLC) and the slave (SITRANS FUS060 with PROFIBUS PA).
Up to seven different measured values (= modules, Slots) can be transmitted cyclically as input
data in a telegram with the Data_Exchange service.
SITRANS FUS060 with PROFIBUS PA
Operating Instructions, 09/2021, A5E02225054-AD
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