Modbus Command or Grounding Test Wire

Figure 9 Grounding of Test Wire or Modbus Command Options

Momentary grounding of a test wire or the Modbus test-mode-enable command causes the FL5000 to enter Test Mode. Initiation of Test Mode is indicated by the analog output dropping to 1.5 mA (3.5 mA with HART and small HART current disabled) and LED flashing in sequence shown in LED Operation Mode Definitions.

If initiating Test Mode via grounding of test wire or Modbus command, the Test Mode times out in 3 minutes.

Flashing of the Test Lamp in the Test Mode enabled via test wire or Modbus results in the following sequence of events:

After 5-8 seconds of the Test Lamp flashing in Phase 3: • the FL5000 goes into Phase 4: ○ indicates 1.5 mA (3.5 mA with HART and small HART current disabled) at the analog output ○ changes the LED flashing to indicate “Test Mode Activated"

After 4.25 minutes in Phase 4: • the FL5000 returns to Ready Mode: ○ indicates 4.3 mA at the analog output ○ restores the LED flashing to “Ready”.

After 5 minutes, if Bluetooth is enabled (Phase 5): • the unit will indicate Bluetooth activity by: ○ setting the analog output to 3.0 mA ○ changing the LED flashing sequence to Bluetooth Active mode ○ setting the relay to Ready state.

NOTE: After the test is initiated via wire or Modbus; all other commands are ignored until the Test Mode is over. • While in Test Mode, the unit will not detect flames. • Interruption of the Test Lamp flashing for more than 3 seconds will result in termination of the test sequence and a return to Ready Mode (Phase 0).