Hoffman Controls Model 610 Series - Installation; Modbus RTU Installation; Initial Checkout Procedure

ne
ct
ed to a Modbus RTU communication link. A Modbus RTU
Master Computer is used to read and / or write data to any or all
of the
internal data registers of
each
Model 610
connected to the
communication link
.
Remote operation can be implemented, at any time, by using
a Modbus RTU master computer to send the appro
priate register
data, listed in
Table
6A & 6B
,
on pages 13 & 1
4
,
to the Model
610's internal data registers, via a 3 wire Modbus RTU connection.
All of the Model 610's
options,
parameters and numerical values
can be read and set remotely using the Modbus
RTU connection.
NOTE:
Since t
he Model 610's operation is controlled by the
data stored within its internal registers, the Model 610
provides
the same identical operation,
whether
the register data is changed
locally (
m
anually) or remotely.
When
the Model 610 is equipped with Modbus, all sensed
current and temperature values, all trip information, and all
settable parameters and numerical values can be remotely viewed
and/or updated using a Modbus RTU master computer. The
Modbus RTU
master computer can read and or write information
(data) to each
Model 610
connected to Modbus. See the
Modbus
RTU Operation
section
(page 16) for additional information.
A combination of local and remote operation can be used to
remotely download and verify any of the Model 610's updated
parameters and numerical values. An installer observes local opera-
tion after the download, then makes and verifies any further
operational improvements, before the register data is uploaded to
the remote site and saved for future use.
1.
The Model 610 Digital Current Monitor is designed for u
se
with single phase or three (3) phase motors (across
-
the-line or part
3
Description Con't
Installation
[split] winding) that draw between 5 and 200 amps.
2.
The
TRIP
and
ALARM
relays' maximum output ratings are:
24 VAC at 10 Amps each.
3.
Wiring must comply with Local and National Electrical
Codes.
4.
Locked Rotor Amps (LRA) is calculated as 5 times the motor’s
running (trip) amps.
5
.
Do not mount the Model 610 in an airtight cabinet/compart-
ment or on a vibrating surface.
For Both Local and Remote Operation:
NOTE:
The Model 610 Digital Current Monitor is not weatherproof
and needs to be protected from moisture and condensation
.
IMPORTANT:
T
he
TRIP
and
ALARM
relays'
N.O.
and
N.C.
terminal
names correctly identify the functions of these terminals
after 24 VAC power is applied to the Model 610. When
24 VAC power is turned off, the TRIP and ALARM
relay's
N.O.
to
COM
contact is
closed
and the
closed and the closed
N.C.
to
COM
contact
is
open
.
This arrangement was chosen to
enab
le the Model 610 Digital Current Monitor to discon-
nect power to the motor and enable an alarm in the event
that the Model 610 Digital Current Monitor loses power
or fails.
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Current Transformer Alignment
Figure 1
IMPORTANT:
If any of the down loaded Modbus RTU data is incor-
rect, the Model 610 Digital Current Monitor's micro-
controller will change the incorrect data into software
selected default values during the Model 610's next
operating cycle. Therefore, after updating any data
manually or remotel
y,
manually or remotely,manually or remotel
th
e operator
MUST
allow the
Model 610 to operate
for a brief time period
before re-
for a brief time period before re-for a brief time period
viewing ALL of the data contained in each of the
Model
610
's
3
2
register addresses to 1) ensure that all of the
operating parameters and numerical values, needed
for the application, have been correctly selected and 2)
also ensure that any unneeded or undesired options or
numerical values have not inadvertently been left
selected.
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