BCMS Setup: Accumulator Application
Cntl Nr: PM375107-002
19
connection
on the Bus Rail. A new Tap Off Box can be plugged into
any
available Modbus
connector and will be assigned the first available
No Device
Modbus address.)
To monitor (32) physical devices, you cannot have
Reserved
or
No Device
designations in the bus run,
once all devices are identified.
When you insert a new Tap Off Box into the bus rail, Setup replaces the first available (lowest address)
No
Device
position with an
IBUS
entry for the Tap Off Box. If a
No Device
address is not available, Setup
assigns the next sequential Modbus address at the end of the existing address list.
3.6
Setup Tab: Manipulating the Device List
Setup creates the initial device list from the devices it recognizes when it first starts up. Each device will
have a Modbus address associated with the ID of the device (assigned during manufacturing).
Recommendation:
To better control assignment of Modbus addresses to Tap Off Boxes, do not connect
the Tap Off Box monitoring cable to the bus rail until you are ready to assign its address. This will allow
you to assign addresses one-by-one in sequence.
3.6.1
Add, Remove, or Swap Devices
Use the buttons on the right side of the Setup Tab screen to add, substitute, swap, or remove devices from
the Modbus address list.
“No Device” Entries
A
No Device
entry has a Modbus address, but has no physical device. A
No Device
entry can be replaced
by a new device, usually a Tap Off Box or iBus PCB.
•
Insert
Check a device box. Click
Insert
to add a
No Device
entry before the checked device. The
Modbus address of every device after the insertion point is incremented by 1.
•
Remove
Check the box for the device to be removed.
Remove
changes this address location to
No Device
:
o
Reserved
No Device
o
IBUS
No Device
o
IN PM
No Device
o
No Device
Deleted Modbus address (
Remove
deletes the address
only
if
No Device
is
the last device in the list.
Remove
has no effect if
No Device
is
not
the last entry in the
address list.)
“Reserved” Entries
•
Add
Adds a new
Reserved
device at this address. This relative address in the device list will
unavailable for use until its status is changed to
No Device
.
•
Reserve
Check the box next to a
No Device
entry.
•
Reserved
addresses must be changed to
No Device
be available for assignment.
Swap
Check two boxes in device list. Click
Swap
to swap the address of the two devices, and hence
change their positions in the list.
