4. DESCRIPTION OF FRONT PANEL AND
CONNECTION OF SETTING TOOLS
4.1 Front Panel
The communications connector in the front panel is used for setting
up parameters through a PC (VJ77 PC-based Parameters Setting
Tool) or the Handy Terminal. The RLY1 and RLY2 LEDs light up if a
contact is ON
(those LEDs are provided only when the output-2 is
specified for contact output (the output-2 suffix code is T).)
Relay 1 indicator lamp
Communication connector
Relay 2 indicator lamp
4.2 Connector for Communication
Use the connector for communication when setting the
parameters using a PC (VJ77 Parameters Setting Tool) or the
Handy Terminal.
< How to connect with the setting tool>
JUXTA communication
cable with 5-pin
connector
Modular jack
conversion
adapter
Dedicated adapter
Dedicated cable
<How to connect with the setting tool>
JUXTA
VJ Series
PC with the
VJ77 installed
JHT200
Handy Terminal
• Use the VJ77 of version R2.02,1 or later.
•
The modular jack conversion adapter does not come with the
JHT200 Handy Terminal. It is sold separately.
5. SETTING PARAMETERS
Set the parameters using a PC (VJ77 Parameter Setting Tool) or
the Handy Terminal. Refer to
in this
manual and the User’s Manual for VJ77 PC-based Parameters
Setting Tool (IM 77J01J77-01E) or the User’s Manual for JHT200
Handy Terminal (IM 77J50H01-01EN).
5.1 Settings Related to Inputs and Outputs
5.1.1 Input Type
Set by selecting input type from among VOLTS (DC voltage)
and CURRENT (DC current) in
[D12: INP TYPE]
.
5.1.2 Setting Input Resistance
When the input is DC current signal, set the external
resistance in
[D13:IN RESIST]
(see Chapter 3, "EXTERNAL
WIRING"). For example, enter "250" when the input is 4 to 20
mA DC.
5.1.3 Input Range
Set the 0% value of input range to
[D24: INPUT1 L_RNG]
and the 100% value of input range to
[D25: INPUT1 H_RNG]
within the numerically specified range.
CAUTION
In case the input range is changed after factory-ship,
the instrument may not work within the rated accuracy
range depending on the changed input range. Perform
the adjustment following the maintenance of this
instruction manual after changing the input range.
5.1.4 Selection of Program Function
Select the following communication functions in
[D45:PRGM
SELECT]
.
(A) free program, (B) moving average, (C) dead time, (D) first-
order lag, (E) first-order lead, (F) velocity limiter, (G) limiter,
(H) velocity computation, (J) linearizer, and (K) ratio setter
5.1.5 Computation Cycle Time
Set the computation cycle time by selecting either 100 ms or
200 ms in
[D48:CYCLE TIME]
. Displayed only when D45 is
"A".
5.1.6 Direction of Output Action
Analog output signals can be reversed. To reverse the signal
from output-1, set
[D50: OUT1 DR]
to REVERSE. For
output-2, set
[D51 OUT2 DR]
to REVERSE. To return the
output-1 signal to normal, set
[D50: OUT1 DR]
to DIRECT.
For output-2, set
[D51: OUT2 DR]
to DIRECT. Displayed only
when D45 is other than "A".
5.1.7
External Input Resistance Correction
For current input, set the external resistance to
[D13: IN
RESIST]
. There is a difference between this value and the
actual external resistance. If this difference causes an error,
the input can be corrected.
To perform correction, wire as shown in the figure below, apply
a stable input equivalent to 100%, and set
[P40:RESISTOR
ADJ]
to EXECUTE.
If you need perform correction again such as when the
external resistance is changed, reset the correct value. To do
so, set
[P40: RESISTOR ADJ]
to RESET.
A current
generator
VJH7
R
：
External resistor
R
1
3
5.2 Settings Related to Communication
Function
Set the following parameters when output-2 is specified
for communication function. For more information on the
communication function, see the Instruction Manual for VJ Series
Communication Function (IM 77J1J11-01E).
5.2.1 Communication Protocol
Set the communication protocol by selecting from among PC-
LINK, PC-LINK WITH SUM, MODBUS ASCII, MODBUS RTU,
and LADDER in
[F01: PROTOCOL]
.
5.2.2 Communication Address
Set the address number of the isolator numerically in a range
of 1 to 99 in
[F02: ADDRESS]
.
5.2.3 Baud Rate
Set the baud rate by selecting from among 1200, 2400, 4800,
9600, 19200 and 384000 bps in
[F03: BAUD RATE]
.
5.2.4 Parity
Select and set NONE, EVEN, or ODD in
[F04: PARITY]
.
5.2.5 Data Length
Select and set 7 bits or 8 bits in
[F05: DATA LEN]
.
5.2.6 Stop Bit
Select and set 1 bit or 2 bits in
[F06: STOP BIT]
.
5.2.7 Decimal Point Position
Number of decimals of input value (setting of D register
[D0003]) can be set. Select the number of decimals from
among 0 to 5 in
[F07: INPUT DEC PT]
.
3
IM 77J01X07-01E 4th Edition
Feb.20. 2017-00
