Switch Override (07H) - MSA FL500 Operating Manual

Operational Mode Command Register Details
3.8.

Switch Override (07H)

A Read command sends back the status of the Switch Override bit. A Write command changes the value of
the Switch Override bit.
When the Switch Override bit is enabled, the data kept in EEPROM controls the first eight option settings on
the DIP switch (detector sensitivity, relay time delay, relay latching/non-latching, and relay energized/non-
energized). When the Switch Override bit is disabled, the DIP switch on the bottom of the power/relay board
controls the option settings.
NOTE: The Switch Override bit has an effect on the first eight option settings only. The Switch Override
bit does not have an effect on the option settings for switches 9 and 10 (HART Enabled and
Alternate LED).
Function
Enable
Disable
The Switch Override bit is in the LSB of the Low data byte. The High data byte is not used.
NOTE: If you ground the Alarm Test input during the start-up cycle (approximately 10 seconds), the
FL500 sets the Switch Override bit to 0 to enable the DIP switch. Refer to the FL500 UV/IR
Flame Detector Operating Manual (PN 10193213) for information about the Alarm Test feature.
US
12
Bit (LSB) Access
1 Read/Write
0 Read/Write
FL500 Modbus Communication Operating Manual