Profisafe Watchdog Time - Danfoss iC7 Series Operating Manual

Operating Guide | iC7-Automation Functional Safety
Table 25: Settings in the Safety PLC
Value
F_WD_Time
Safety telegram & F-I/O data of the safety telegram
The following PROFIsafe-related parameters cannot be edited in the drive. They must have the same value in the safety PLC
communication to the gateway chip in the drive over PROFIsafe. The values in the following table are defined in the fieldbus GSD
description file, which is provided for the gateway chip in the drive by Danfoss, and must not be modified.
The drive has Type 1 of F-Address-Check, it means only F_DestAdd is checked by the drive.
IMPORTANT:
Perform a commissioning test to ensure the correctness of the iParameter of the drive.
IMPORTANT:
Table 26: Non-editable F-parameters
Parameter
F check iPar
F CRC length
F block ID
F Par version
F SIL
1) Depends on the PROFIsafe version: V2.4, 3 bytes CRC; V2.6, 4 bytes CRC.

PROFIsafe Watchdog Time

4.5.5
Use the F-parameter watchdog time (F_WD_Time) to determine a watchdog time for the communication between F-host and F-device.
The minimum watchdog time has 4 parts:
DAT = Device Acknowledgment Time. The F-device receives a frame, processes it, and prepares a new frame to send.
l
Bus = the transfer time of the frame from the AC drive to the F-host.
l
HAT = Host Acknowledgment Time. F-host receives a frame, processes it, and generates a new frame.
l
Bus = the transfer time of the frame from the F-host to the AC drive.
l
DAT Bus
Figure 15: PROFIsafe Watchdog Time
Danfoss A/S © 2024.08
(continued)
Value
0 = NoCheck
0 = 3 bytes or 4 bytes CRC
1 = F iPar CRC within F para-
meter block
1 = V2 Mode
8 = SIL 3
F WD Time (minimum)
HAT
Functional Safety for Frequency Converters, Upgradable (+BEF2)
Description
The value must be the same as the F_WD_Time on the AC drive.
The value must be the same as the safety telegram in the drive.
F-I/O data must be mapped as described in the tables in
PROFIsafe Control Word
Unit
–
(1)
–
–
–
–
Bus
and 4.5.9 PROFIsafe Status Word.
Description
Manufacturer-specific iPar
check.
CRC2 signature length.
Parameter block type identifi-
cation.
Version no. of F parameters.
Employed SIL level of F-device.
AQ319741840653en-000401 / 136R0268 |
4.5.8
39