Operation Manual
FT128 Rev 2.4
123
27 Maintenance (H8)
Only authorised personnel have access to (H8), user name and password for level 3A
(Service technician) are required.
Disconnected (disabled) loop, etc. is indicated by LED "Disablements" (L8) and is listed in
menu H4/U1.
27.1 Disconnect / Re-connect COM loop (H8/S1)
To avoid damage on the units and FT128 during physical connection / disconnection of
loop units, it is highly recommended to have the loop disconnected (disabled), i.e. the loop
is voltage free (dead). Zone line input requires an 8 zones expansion board 4580 in the
control unit or an Addressable multipurpose I/O unit 3361/4461 connected on a COM loop.
One or more disconnected "loops" are indicated by LED “Disablements", the LED “Service”
is flashing, and disconnected loops are listed in menu H4/U1.
Note: When you disconnect and re-connect the COM loop, all the statistics shown in
menu H5/A6 will be erased and set to "0".
Action Text in display Comments
"Access"
Log on to FT128 as
shown in page 35.
Scroll to menu H8. Maintenance
ACCEPT? H8
"A"
Disconnect / Re-connect COM loop
ACCEPT? S1
"A"
or
"Return"
COM-loop is connected.
Press ACCEPT to disconnect
Depending on if the
COM loop shall be
disconnected or re-
connected, press "A" or
"Return"
"A"
or
"Return"
COM-loop is disconnected.
Press ACCEPT to re-connect
"A"
Disconnect / Re-connect COM loop
ACCEPT? S1
Scroll or press "Return"
to H8.
"Return" Maintenance
ACCEPT? H8
Scroll or press "Return".
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