OJ Electronics OJ EC HTERM Instructions Manual

I N S T R U C T I O N S
OJ EC HTERM
67038 05/11 (MBC)
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English
LIST OF FIGURES
The following figures are located at the back of
the instructions:
Fig. 1: Dimensions
Fig. 2: Wall bracket
Fig. 3: Connecting OJ-EC-HTERM to OJ-EC-
IOBOX
Fig. 4: LED indications
Fig. 5: RJ12 connection cable
Fig. 6: Strain relief of Modbus cable to OJ-EC-
HTERM
Fig. 7: Relationship between speed and ramp-
up/ramp-down times
Fig. 8: Relationship between speed and min./
max. revolutions settings
Fig. 9: Switch for programming mode
INTRODUCTION
OJ-EC-HTERM is a hand terminal used to set
operating and motor parameters for an OJ-EC
Controller and to operate the controller. The
hand terminal can be used to adapt OJ-EC
Controller parameters to the actual motor/fan
and to display current alarms.
PRODUCT PROGRAMME
PRODUCT TYPE
OJ-EC-HTERM Hand terminal for OJ-EC
FUNCTION
The hand terminal uses Modbus commands
to communicate with the OJ-EC Controller via
the OJ-EC-IOBOX fitted to the controller. Fac-
tory and user setups are stored in the OJ-EC
Controller, and the settings will be remembered
even if the power supply or hand terminal is
disconnected. If the hand terminal is not used
for more than 10 minutes, it will automatically
revert to the main menu so that the risk of
incorrect operation is reduced. Possible settings
and displays are shown in Table 1. By turning
the hand terminal button, it is possible to scroll
upwards or downwards through the menus.
Selections are made by pressing the button.
Selected values are changed by turning the but-
ton. Select "Exit" to leave the menu.
INSTALLATION
OJ-EC hand terminal can be mounted in the
accompanying wall bracket (fig. 2), which must
be fitted to a plane surface.
The hand terminal is removed from the wall
bracket by pushing the terminal upwards and
then pulling it out.
CONNECTION
OJ-EC hand terminal must be connected to con-
nector "C" on OJ-EC-IOBOX (fig. 3) using a bus
cable (type MPFK6S or similar) with RJ12 six-pin
connectors on each end (fig. 5).
FEATURES
Possible settings and displays are listed in
Table 1.
By turning the hand terminal button, it is pos-
sible to scroll upwards or downwards through
the menus. Selections are made by pressing the
button.
Selected values are changed by turning the but-
ton. Select "Exit" to leave the menu.
The default OJ-EC-IOBOX Modbus address is
54 and the default baud rate is 38.4 kbps.
Modbus address and other operating, mo-
tor and communication parameters can be
changed using the hand terminal.
Default Modbus address and baud rate can
be changed from the hand terminal (OJ-EC-
HTERM) using the following procedure: With
the encoder (fig. 9) set to "0", parameters to be
changed can be set to the required values using
the hand terminal. Once the new settings have
been made, set the encoder in position "1" to
activate the user-defined parameters.
The hand terminal will not work if the baud rate
is changed from the default value of 38.4 kbps
and the hand terminal is disconnected from
connector "C".
If baud rate is changed from the default value
of 38.4 kbps or the hand terminal has been dis-
connected, communication with the hand ter-
minal can only be re-established by setting the
encoder to position "0". Baud rate will thus be
set to 38.4 kbps. If the encoder is subsequently
TROUBLESHOOTING
Symptom Cause
No values in OJ-EC-HTERM OJ-EC Controller is switched
– Display switched off off
Defective Modbus cable
Wrongly set baud rate, com-
munication speed
RJ12 connector incorrectly
fitted
© 2011 OJ Electronics A/S
moved to position "1", the parameter settings
made by the user will again be activated.
TECHNICAL DATA
Supply voltage . . . . . . . . . . From OJ-EC-IOBOX
Modbus RTU . . . . . . . 2 x RJ12/6/6 pole RS485
Enclosure rating . . . . . . . . . . . . . . . . . . . . . . IP21
Ambient air humidity .10-95% (non-condensing)
Ambient temperature . . . . . -30.. +50°C (storage)
. . . . . . . . . . . . . . . . . . . . . . 0.. +40°C (operation)
Dimensions . . . . . . . . . . . . .171 x 82 x 38.5 mm
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 g
LED INDICATIONS
The hand terminal has two built-in LEDs (fig. 4),
which indicate the following:
On Flashing
RED LED Alarm active
GREEN LED OK Override by means
of hand terminal
ALARMS
Current alarms are displayed as shown in Table
1.
Alarms are automatically reset if the alarm
situation passes, allowing the OJ-EC Controller
to restart. However, once the maximum number
of restarts has been exceeded, the alarm must
be reset by selecting "Reset Alarm" in the alarm
menu. Alternatively, the "Alarm reset" input
(OJ-EC-IOBOX terminals 11 (Alarm reset) & 12
( )) can be short-circuited or the power supply
to the OJ-EC Controller disconnected.
SERVICE AND MAINTENANCE
No special maintenance is required.
Please contact your supplier if the product
becomes faulty.
DISPOSAL AND ENVIRONMENTAL PROTEC-
TION
Help protect the environment by disposing of
the packaging and redundant products in a
responsible manner.
PRODUCT DISPOSAL
Products marked with this symbol
must not be disposed of along with
household refuse but must be deliv-
ered to a waste collection centre in
accordance with current local regulations.
Action
Switch on OJ-EC Controller
Repair or replace Modbus cable
OJ-EC-IOBOX
Set the encoder to position "0"
(fig. 9)
Check connectors in both OJ-EC-HTERM and
EC-IOBOX.
OJ-EC-IOBOX
connector "C" must be used for the
hand terminal.
Both RJ12 connectors on OJ-EC-HTERM are active
and can therefore be used.
OJ-