Using F-Fbs - Siemens Second Wind Function Manual

Configuration
4.4 S7 Distributed Safety
Step
Checking the safety program
Loading the safety program in the F-CPU
Testing and acceptance testing of the safety
program
4.4.2

Using F-FBs

Required F FBs
You must integrate the following fail-safe blocks in your safety program:
● For each HMI device: An F_FB_MP
● For each effective range: An F_FB_RNG_4 or alternatively an F_FB_RNG_16
● An F_DB_STATES with a WORD data type or a comparable address area in an available
● FB 215: F_ESTOP1; with this block, you can ensure that the operator must first provide
● FC 176: F_BO_W and FC 177: F_W_BO
60
The assigned HMI device is monitored by this F FB.
The assigned effective range is managed by this F FB.
The number of HMI devices that should get permission to log onto the effective range
determines the F FB that is called, F_FB_RNG_4 or F_FB_RNG_16:
– F_FB_RNG_4 For a maximum of 4 HMI devices
– F_FB_RNG_16 For a maximum of 16 HMI devices
F DB
Using this F DB, data is exchanged between the F_FB_MP of the HMI deice and
F_FB_RNG_n of the effective range.
confirmation after an emergency stop before the plant can be restarted. You can find this
block in the Distributed Safety F library in the F Application Blocks block container.
Insert the FC 176: F_BO_W and FC 177: F_W_BO blocks into your safety program since
these blocks are used as calls. You can find these blocks in the Distributed Safety F
library in the F Application Blocks block container.
WARNING
Defective fail-safe application blocks
Do not change the numbers of F application blocks!
Ensure the following matches when changing the names of F application blocks:
• The symbolic name in the symbol table
• The name in the object properties of the block (header)
Information
Online help for the F-FBs
•
FB161: Mobile Panel Status
•
(F_FB_MP) (Page 63)
FB162: Effective range for 4
•
Mobile Panel (F_FB_RNG_4) / FB
163 Effective range for 16 Mobile
Panel (F_FB_RNG_16) (Page 67)
S7 Distributed Safety, chapter "Safety
program acceptance test"
Fail-safe operation of the Mobile Panel 277F IWLAN
Function Manual, 08/2008, 6AV6691-1FQ01-2AB0
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