Danfoss VLT FC 280 Operating Manual page 64

VLT® Midi Drive FC 280
Operating Guide
Standard data Safe data
PROFisafe layer
Standard bus protocol
Illustration 35: PROFIsafe Communication
6.5.2 PROFIsafe System
The drive can communicate with safety PLC via PROFINET. The exchanged data includes safety-related data and non-safe process
data. For safety-related data, it goes through PROFIsafe frame and matches PROFIdrive format.
The drive supports PROFIsafe V2.4 and V2.6. V2.6 is forward compatible with V2.4. To provide maximum flexibility and convenience,
the GSD file contains 4 modules. Select 1 of the following modules according to the requirement to set up communication between
the PLC and drive.
• PROFIsafe_1: PROFIsafe V2.4, 3 octets CRC checksum, F_iPar_CRC checking is disabled.
• PROFIsafe_2: PROFIsafe V2.4, 3 octets CRC checksum, F_iPar_CRC checking is enabled.
• PROFIsafe_1: PROFIsafe V2.6, 4 octets CRC checksum, F_iPar_CRC checking is disabled.
• PROFIsafe_2: PROFIsafe V2.6, 4 octets CRC checksum, F_iPar_CRC checking is enabled.
6.5.2.1 The PROFIsafe Frame
The PROFIsafe frame, which is exchanged between the safety PLC (F-host) and the safety follower (F-device), includes:
• Safety I/O data (F-I/O), which is used to control the drive safety process.
• A status/control byte, which is used for the PROFIsafe communication.
• A CRC signature, which ensures the validity of the frame.
S S
F-I/O data
Maximum 13 octets
1) PROFIsafe V2.4 corresponds to 3 octets, and PROFIsafe V2.6 corresponds to 4 octets.
Illustration 36: Structure of the PROFIsafe Frame (S=Standard Frame)
To indicate, monitor, and set the safety status of the F-device, see the status and control bytes descriptions in the following tables.
For more details, refer to PROFIsafe – Profile for Safety Technology on PROFIBUS DP and PROFINET IO Technical Specification.
Table 29: PROFIsafe Status Byte Description
Bit Signal
0 iPar_OK
1 Device_Fault
2 CE_CRC
3 WD_timeout
64 | Danfoss A/S © 2022.02
Safe data Standard data
PROFisafe layer
Standard bus protocol
PROFINET IO
S S S
Status byte/
CRC2
control byte
1 octet 3 or 4 octets
Description
Not used
Fault in F-device
Communication fault: CRC
Communication fault: watchdog timeout
S
1)
Safety Functions
AQ381425076031en-000101 / 130R1223