Operation: CP1SD/T/L Version
CENTRON® Polyphase Meter Technical Reference Guide
59
Implementing Security Codes
When a customer file is created, security codes are entered by the software (PC-PRO+
Advanced) operator. Each security code may be from 1 to 20 characters long. For example,
the primary code is selected to be ABC and the secondary code is to be 123. When the
software first attempts to communicate with a meter that has just been delivered from the
factory, the meter has only null security codes. The software downloads and unlocks the
meter with these null security codes. When the meter is initialized, the software downloads
security codes ABC and 123 to the meter.
When unlocking a meter with security codes, the software downloads the primary code that
is in the PC-PRO+ Advanced Device Security Codes dialog— in this case ABC. If this code
matches the meter primary code, the operator can read and/or program the meter. If it does
not match the primary, but matches the secondary, 123, the operator can only read data from
the meter.
For example:
Three PCs are set up to interrogate D/T/L Registers. One PC is designated as the Master PC.
The Master PC programs D/T/L Registers for installation and interrogates meters in the
field. In this example, the Master PC programs a meter with a primary security code of
SEN1 and a secondary security code of 222. The Master PC can then read data from and
reprogram the meter. The remaining two PCs are configured so that the same customers are
in each database, but each PC-PRO+ Advanced software is configured with a security code
that matches the meter’s secondary security code only. In this case, the two additional PCs
have been given security code 222. When the two PCs interrogate the meter, the security
code they download provides them with secondary security code privileges only.
To set up a meter so that the Master PC can perform all meter functions, but any other PC
has limited access, program the meter through the Master PC with a primary security code,
but leave the secondary security code blank. Any PC other than the Master PC will connect
to the meter using a blank security code and thereby gain secondary access only.
Clearing Security Codes
To clear the existing security codes in the meter, perform a Factory Reset.
If security codes are cleared from the meter in this manner, the PC will have no record of a
security code change. The PC will go through the following attempts to gain access to the
meter:
If the
Options
|
Default Values
|
Device Security Codes
|
Override Security Code
menu option
IS
NOT
checked, PC-PRO+ Advanced will:
Use the security code in the device
Primary
field.
Use the security code in the device
Previous Security Code
field.
Use all nulls.
If the
Options
|
Default Values
|
Device Security Codes
|
Override Security Code
menu option
IS
checked, PC-PRO+ Advanced will:
Use the security code entered in the
Security Code
field on the logon screen.
