Communication
2.1 PROFIBUS communication
SIMOCODE pro - Communication
Function Manual, 11/2018, A5E40508495002A/RS-AC/003
17
Telegram description and data access
2.1.4.1
Cyclic data is exchanged between the PROFIBUS DP master and the DP slave once every
DP cycle. The PROFIBUS DP master module sends the control data to SIMOCODE pro.
SIMOCODE pro responds by sending the message data to the master module.
The program of the PLC accesses the following cyclically:
● send data at the inputs
● receive data at the outputs.
The length of the cyclic data which is to be transferred is set when SIMOCODE pro is
integrated into the DP master system. This is achieved by selecting the basic type which in
turn determines the structure and the length of the cyclic data.
The following basic types are available:
● Cyclic data from the PROFIBUS DP master to SIMOCODE pro
● Cyclic data from SIMOCODE pro to the PROFIBUS DP master.
Table 2- 1 Cyclic data from the PROFIBUS DP master to SIMOCODE pro:
Basic type 1 4 bytes of receive data
Cyclic receive - bits 0.0 to 1.7
GG SIMOCODE pro S, pro V PB
Cyclic receive - analog value
Cyclic receive - bits 0.0 to 1.7
PROFIsafe 5 bytes of receive data 1 bit net data, assigned permanently
to the relay enabling circuits
BU SIMOCODE pro V
Table 2- 2 Cyclic data from SIMOCODE pro to the PROFIBUS DP master:
Basic type 1 10 bytes of send data
Cyclic send - bits 0.0 to 1.7
GG SIMOCODE pro S, pro V PB
Cyclic send – analog input 1 to 4
Basic type 2 4 bytes of send data
Cyclic send - bits 0.0 to 1.7
BU SIMOCODE pro C, pro S and pro V
Cyclic Send – analog input 1
BU SIMOCODE pro V
The cyclic data content (digital / analog information) is set by parameterization, e.g. with the
SIMOCODE ES software.
The cyclic I/O data is already preset when the type of application (control function) is
selected when the "SIMOCODE ES" parameterization software is launched (see Chapter
Assignment of cyclic receive and send data for predefined control functions (Page 128)).
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