Parameterizing The Profisafe Communication (Nck) - Siemens SINUMERIK 840D sl Function Manual

Connecting Sensors/Actuators
7.2 Connecting I/O via PROFIsafe
SPL–SGA interface: See Subsection 7.2.6 "Parameterizing the SPL-SGA inter-
face (NCK)".
7.2.4

Parameterizing the PROFIsafe communication (NCK)

F master address
In order to define a unique and clear communication relationship between F slave
and F master, in addition to the target address (PROFIsafe address of the F
slave), the source address (PROFIsafe address of the F master) must be defined.
The PROFIsafe address of the F master is entered into the following machine
data:
S MD10385: $MN_PROFISAFE_MASTER_ADDRESS
(PROFIsafe address of the F master)
Input format: 0s 00 aaaa
– s: Bus segment
Range of values: 5 = DP connection on the PLC side
– aaaa: Hexadecimal PROFIsafe address
Range of values: 1...FA7D
Note
The PROFIsafe address of the F master is provided under:
S HW Config > Properties dialog box of the F module > F parameter:
F_source_address
If the value entered does not match the value displayed in the F modules, an alarm
is issued when the control boots:
S Interrupt: 27220 "PROFIsafe: Number of NCK F modules (%1) < > Number of
S7 F modules (%2)"
In this case, alarm parameter %2 contains the value 0.
PROFIsafe clock cycle
The PROFIsafe clock cycle defines the time grid in which new F telegrams are
generated by the F master for transfer to the F modules. The PROFIsafe clock
cycle is derived as standard from the interpolation cycle in the ratio 1:1.
As part of the PROFIsafe communications, a cyclic interrupt of the PLC user pro-
gram (OB1) is made. This is realized in the PROFIsafe clock cycle via OB40.
7-182
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
H
© Siemens AG, 2006. All rights reserved
03.06