Communication blocks
2-40
Function Blocks - FM 458-1 DP
Edition 12.2004
2.4.5 PSTAT Change enable for parameters
PSTAT
Password
―
I PSW WLV
W
―
Access level
Level 1
―
I PW1 WST
W
―
Device status
Level 2
―
I PW2 YTS
W
―
Status display
Level 3
―
I PW3
Level 4
―
I PW4
Level 5
―
I PW5
Level 6
―
I PW6
Level 7
―
I PW7
Level 8
―
I PW8
Device status
―
I STE
Using the function block, the following can be realized
•
a current device status can be configured,
•
the access level can be defined by entering a password,
•
the device status and the access level is used to define whether a
parameter may be changed.
The statuses and access level, in which a parameter is to be inhibited or
enabled, are defined using the PLIM function block.
Function block PSTAT may only be configured once in each FM module.
PSW
Current password:
If password PSW does not coincide with the PWi values, then this corresponds to access level
0: this does not permit any change.
If password PSW coincides with a value of PWi, then this corresponds to access level i and all
lower access levels.
In access level 8, there are no access authorizations as a result of the access level (all other
access restrictuions, e.g. using the device status, are retained).
(Default: 0)
PWi
Appropriate password for access level i (password i):
(Default: 0)
STE
Actual "device status": There are 16 statuses.
Permissible entry range: 1 to 16
(Default: 1)
Symbol
Brief description
I/O