Polycold Cryochiller
Host Commands
Installation and Operation Manual
Security Levels
Brooks Automation
214072 Revision B
7-7
Set Command Information
Most Set values for parameter Host commands are stored to non-volatile flash memory when the SET
is executed.
However, some configuration Set command values are not stored and must be set again after a power
cycle or CPU reset.
Example SECURITY_LEVEL, SYSTEM_CONTROL_MODE
Set commands have min and max values associated with each command. If a set command uses a
value outside the min/max range, F is the response.
Set values take affect immediately and do not require a system restart or power cycle to take effect.
Security Levels
Polycold Cryochiller command functions are security protected and require that the security level be set
to a specific level in order to perform the Get or Set command functions.
•
Security Level 1 - Limited Operator Access -Password: 02030A (where all 0s are zeros)
Limited user access. Allows for locking operators out of access to commands.
•
Security Level 2 - Default Operator Access - Password: 02030B (where all 0s are zeros)
Normal unit access. Normal operations are available such as Cool, Defrost, Rapid BP Check.
•
Security Level 3 - Some Configuration / Maintenance (manager access) Contact Brooks Poly-
cold for password Access to service menu for Zero Line Loss function to allow disconnect and
installation.
Security levels follow these rules.
•
“Get” and “Set” functions for each command require a specific security level and the command
function does not perform unless the security level is set to the required level or higher.
•
Security level for Get and Set functions for each command are hard coded and cannot be
changed.
•
The default system security level is 2 and cannot be changed.
•
Current security level can be temporarily changed by Host command SECURITY_LEVEL.
•
Security level set to 1 stays at 1 until changed by the SECURITY_LEVEL command or the sys-
tem is power cycled.
•
Security level set above level 2 changes back to default level 2 after 5 minutes of inactivity.
•
Time to change back to default can be set using the SERVICE_INTERVAL command.
•
Security Levels are interface dependant.
Example: setting a SECURITY_LEVEL of Level 3 through RS232 Host port does not change
the Security Level of the ETHERNET Host port, WEBGUI, or HMI.
•
Security level does not affect HMI access.
•
HMI access to Service Modes "Authorization Code" menu requires a Security Level password
of 2 or higher. The HMI Service Modes menu options are based on the Security Level password
that is entered.
