Switch And Buttons; Removing/Replacing The Hmi Module - Emerson FB1100 Instruction Manual

4.3

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 4-3: Switch and Buttons
Button Name
SYSTEM RESET
A
B
4.4

Removing/Replacing the HMI Module

You do not need to power down the unit to replace the HMI module if you are in a non-hazardous
area.
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 WiFi transceiver; once you remove the HMI module; WiFi
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 powered on but
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 Section 2.6.1)
Unscrew the front end cap.
Loosen the four captive fastening screws on the HMI module.
Emerson FB1100 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
D301752X012
July 2017
53