Configuration
4.4 S7 Distributed Safety
Fail-safe operation of the Mobile Panel 277F IWLAN
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Function Manual, 08/2008, 6AV6691-1FQ01-2AB0
Step
Information
Check
Checking the safety program
•
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)
Loading the safety program in the F-CPU
Testing and acceptance testing of the safety
program
S7 Distributed Safety, chapter "Safety
program acceptance test"
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
The assigned HMI device is monitored by this F FB.
● For each effective range: An F_FB_RNG_4 or alternatively an F_FB_RNG_16
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
● An F_DB_STATES with a WORD data type or a comparable address area in an available
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.
● FB 215: F_ESTOP1; with this block, you can ensure that the operator must first provide
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.
● FC 176: F_BO_W and FC 177: F_W_BO
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)