Siemens 353, Руководство пользователя

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UM353-1B Function Blocks
April 2012 3-3
A copy of the current configuration running in the controller is stored as a file on the MMC. This file is updated as
changes are made at the local faceplate or as parameter changes are downloaded. The file is stored in the root
directory of the MMC using the serial number of the controller as the file name. The MMC can be used to transfer a
configuration from a controller that may have failed to a replacement controller. The firmware levels of the two
controllers must be the same.
3.1.2 SECUR - Security
The SECUR function block enables a user to lock out
portions or all of the faceplate configuration functions.
Five levels of security are available; see Table 3-1.
Each level is factory set to 000000 (no security), and
can be changed by the user in the field to any number
up to 999999.
A security combination should be assigned to each
security level (1-highest, 5-lowest). A level that
remains at the default 000000 combination will have no
security for the involved function(s) regardless of the
security assigned to the other levels. For example,
assume that level 1 is assigned a security combination
but level 4 remains at 000000. If a controller
calibration is performed, the station will not prompt the
user for the security combination and anyone will be
able to store new calibration values.
If security is desired, all 5 levels of security should be set with either the same value or different values when
different individuals are granted access to only certain functions. The functions that can be accessed at the various
security levels are listed in Table 3-1. The security combination will be required when the user attempts to store a
parameter or attempts to view a security combination. The faceplate alphanumeric will display “ENTR COM” and
allow the user to enter and store the combination. A combination is entered by selecting one digit at a time using the
Å
and
Æ
keys and setting the number for that digit using the pulser. When all digits have been set, press STORE.
If incorrect, the alphanumeric will display “ACCESS/DENIED” and then return to the parameter level. Once a
combination has been entered correctly, access will be provided for all functions within that level until the user exits
configuration. If a combination is lost, contact Siemens technical support to obtain a method to enter configuration
and change the security codes. Refer to Section 1.3 Customer/Product Support for contact information.
The PC-based i|config Graphical Configuration Utility may also have security options similar to the above.
However, there is no security in the download procedure itself. At the controller, there are parameters in function
block STA_PARM that will lock out all downloads and all parameter writes from a PC.
Table 3-1 Security Level vs. Accessible Operations
FUNCTION LEVEL 1 LEVEL 2 LEVEL 3 LEVEL 4 LEVEL 5
Station Function Block Edit X X
Loop/Function Block Add/Delete X X
Loop/Function Block Edit X X X
Security Configuration X
Calibration of Input/Outputs X X
Quick Faceplate Access* X X X X
Configuration of NEW FCO and MMC X X
Change CLOCK X X
* Security does not apply to continuously adjustable quickset parameters that include RATIO, BIAS, and QHLD.
SECURITY
1
LEV
el
1 COM
bination
(S)
.... 000000-999999 (000000)
SECURITY
SECUR
M C O E V L
2 M C O E V L
3 M C O E V L
4 M C O E V L
LEV el 2 COM bination
(S)
.... 000000-999999 (000000)
LEV el 3 COM bination
(S)
.... 000000-999999 (000000)
LEV el 4 COM bination
(S)
.... 000000-999999 (000000)
5 M C O E V L
LEV el 5 COM bination
(S)
.... 000000-999999 (000000)