Specifications

RFC-1 Advanced Operation page 6.51
6.9 Security Codes
There are four security codes in the RFC-1. They are: the main security code, the control security code, the basic
programming security code and the advanced security code. The easiest way to read and reprogram the security
codes is using the prompted commands 72, 73, 74 and 75. They are described in section 5 of this document.
For security reasons, the prompted commands only work from the local phone. If it becomes necessary to change
the security codes from a remote location, the codes can be changed in programming mode.
6.9.1 Security Code Programming
All of the security codes can be changed in programming mode—including two extra control security codes that are
not discussed in basic operation. Security codes are stored at memory addresses 0948-0983 in the address table.
• The main security code starts at address 0948.
• Control security code A starts at address 0956.
• Control security code B starts at address 0960.
• Control security code C starts at address 0964.
• The advanced programming security code starts at address 0972.
• Control security code block assignments start at address 0976.
The main security code can be up to eight digits long. All other codes can be up to four digits long. Program a single
digit at each memory address. If a shorter code is used, fill the unused spaces at the end with the value 10. A code
will be disabled if it programmed entirely with the value 10.
6.9.2 Control Security Code Mapping
Up to this point all references to control security codes mention a single control security code. There are, in fact,
three control security codes in the RFC-1. They are referred to as control security code A, B and C. Each block of
channels, in other words each relay panel, can be assigned one of the three control security codes. In the factory
settings control security code A is assigned to all relay panels. This is appropriate for most installations.
Using multiple control security codes allows critical and non-critical functions to be wired to separate relay panels and
given different codes. Only personnel who are allowed access to critical functions should be given that security code.
Use of multiple control security codes also allows a single RFC-1 to control up to three transmitters with an extra
degree of security. If each transmitter is connected to a different relay panel then a different control security code can
be assigned to each transmitter. Only the main security code is needed to take readings. But controlling a
transmitter requires the control security code assigned to that transmitter’s relay panel.
To assign a control security code to a block of channels, select the code A, B or C from the table below and program
the value in column V1 at the memory address for the corresponding channel block. These assignments are made at
memory address 0976-0983 in the address table.
V1
Control Security Code
1 *
Assign control security code A
2
Assign control security code B
3
Assign control security code C
* This is the default setting.