Switch And Buttons; Removing/Replacing The Hmi Module - Emerson FB1200 Instruction Manual

5.3.

Switch and Buttons

A momentary switch and two push buttons on the HMI module provide trouble-shooting options
for the flow computer.
DANGER
EXPLOSION HAZARD: Never remove end cap(s) in a hazardous location. Removing end cap(s) in a
hazardous location could result in an explosion.
Table 5-3: Switch and Buttons
Button Name
SYSTEM RESET
A
B
5.4.

Removing/Replacing the HMI Module

You do not need to power down the unit to replace the HMI module.
DANGER
Ensure the flow computer is in a non-hazardous area. Never remove/replace the HMI module in a
hazardous area.
Important
The HMI module includes the Wi-Fi transceiver; once you remove the HMI module; Wi-Fi
communication with the flow computer ceases.
1.
2.
3.
Service and Troubleshooting
Purpose
Resets power. This momentary switch
interrupts power to the flow
computer to reset it. Used if system is
powered on but is non-functional; this
attempts a reboot.
Clears memory (SRAM). The SRAM
memory holds current data values and
pending alarm messages. If unit has
unexpectedly stopped operating, you
can depress this button on power-up
to clear that information from
memory (hard reset). Try this if a
SYSTEM RESET alone does not work.
Currently undefined
Remove the retaining clamp from the front end cap (if present). (See
Unscrew the front end cap.
Loosen the four captive fastening screws on the HMI module.
Emerson FB1200 Flow Computer Instruction Manual
Procedure
Move the SYSTEM RESET switch either
up or down. Unit powers off and then
restarts.
1. Press and hold the A button.
2. While continuing to hold the A
button, move the SYSTEM RESET
switch either up or down to
initiate a reset.
3. Release the A button. The system
clears SRAM during the power up
sequence.
None
D301782X012
March 2019
Section 2.6.1.)
85