8 Safety-related Aspects of the User Program HIMatrix
Page 56 of 72 HI 800 023 E Rev. 1.01
WARNING
Use of forced values can disrupt the safety integrity!
Only remove existing forcing restrictions with the consent of the test authority
responsible for the final system acceptance test.
8.2.10 Force Editor
SILworX Force Editor lists all variables, grouped in global and local variables.
For each variable, the following can be set:
Force Value
Force Switch
The force switch enables the forcing of variables. The forcing of all variables with an active
force switch can only begin when local or global forcing has been started.
Forcing can be started and stopped for both local and global variables.
It is possible to start forcing with or without a specified time limit. If none of the restrictions
apply, all variables with an active force switch are set to their force values..
If forcing is stopped manually or because the time limit has expired, the variables will again
receive their values from the process or the user program.
For more information about the Force Editor and forcing, refer to the SILworX online help.
8.2.11 Forcing Signals - Versions Prior to 7
(possible with controllers and the F3 DIO 20/8 01 remote I/O)
Forcing a signal means that any values can be entered for the signal. A signal can be
associated with an input or output, or can be used for communication.
The following table specifies the force switches and parameters:
Switch Function
Default
Value
Setting for
safe operation
Forcing al-
lowed
A force function is enabled OFF OFF /ON
1)
Stop at
Force Time-
out
It stops the CPU upon expiration
of the force time.
ON ON
Parameter Function
Default
Value
Indicators
Forcing acti-
vated
Forcing Active OFF OFF ON
Remaining
force time
Time-limit for the force value,
time (in seconds)
0 0
Remaining force
time or -1
1)
See also the warning message below:
The Force Allowed and Stop at Force Timeout switches cannot be changed when a con-
troller is operating and locked, i.e., define these settings prior to locking the controller.
Table 31: Force Switches and Parameters
Enter the value -1 for forcing without time limit.
Force Allowed - CPU Switch
Not set:
- Forcing is not possible (default setting).
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