Purge Override Contacts; E2Prom; Save Tables To E2Prom - ABB PGC2000 Operation And Service Manual

6. With X Purge reset, the air purge timed cycle begins in the electronics housing.
When you use Override during start-up, it overrides the X Purge control of power to the analyzer, but
the air purge timed cycle continues. Once the electronics housing has pressurized and X Purge
completes its timed purge cycle, the analyzer will have power from the X Purge. If you replace the
housing cover without turning the power off at the circuit breaker, the analyzer will still have power
because of X Purge.
If the electronics housing pressure drops during Override use and if the timed cycle is complete, the X
Purge will lock out its power to the analyzer. Since Override bypasses the X Purge, the analyzer will
still have power. If you cancel Override by replacing the housing cover without turning off the power
at the circuit breaker, the X Purge power lock out will cause the analyzer to be without power. To
restart X Purge, you must correct the cause of the drop in pressure, then turn power OFF (for at least
ten seconds), and then ON again. The X Purge must complete its timed cycle before the analyzer will
receive power.
X Purge Override Contacts
The X Purge housing has terminals for connecting an override jumper (see Figure 4-36). The
customer is solely responsible for connecting and maintaining this jumper, which is only to be used
during start-up, maintenance and troubleshooting. The customer must ensure the override jumper is
removed when start-up, maintenance and troubleshooting are completed.

E2PROM

The Electrical Erasable Programmable Read Only Memory (E2PROM) can store the following tables
and functions.
Method Tables
Trend Tables
Report Format
Vista Basic Tables
Temp Control Table
VistaNET Tables
Chromatogram Storage Parameters
This feature preserves vital tables and functions if you have power failure. Changing any of these
tables or functions the GCC enters the change into RAM. To preserve the tables and functions, you
must save them to nonvolatile memory (E2PROM).
The SAVE TABLES TO E2PROM and RESTORE TABLES FROM E2PROM
commands alter significant portions of memory. Be sure to read this entire
subsection before executing either command.

Save Tables to E2PROM

This command saves tables and functions to nonvolatile memory to ensure an analyzer failure will not
erase them.
4-37
Stream Table
Time Table
Report Headers
Control Parameters
Press. Check Table
Name Headers
NOTE
Digital Table
Random Stream Table
User Sensor Names
Temp Check Table
Press. Control Table
Name Streams
2000-OSM, F1