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All Rights Reserved. Copyright © 1999, Yokogawa M&C Corporation
IM 77J01S07-01E
3rd Edition Mar.31,1997-00
IMPORTANT
●
If this instrument is used in a manner not sepecified in
this manual, the protection provided by this instrument
may be impaired.
●
If the product is operated by a power supply exceeding
the specifications, the product may become extremely
hot and, as a result, damaged. To prevent this, ensure
the following before turning on the power.
(a) The voltage of the supplied power and the input
signal level meet the specifications of the product.
(b) External wires are connected to the correct termi-
nals (refer to Chapter 5).
●
Do not operate the product in the presence of flammable
or explosive gases or vapors. To do so is highly danger-
ous.
●
The product is sensitive to static electricity; exercise
care in operating it. Before you operate the product,
touch a nearby metal part to discharge static electricity.
7. DESCRIPTION OF FRONT PANEL
AND CONNECTION OF SETTING
TOOLS
7.1
Front Panel
The communications connector in the front panel is used for set-
ting up parameters through a PC (VJ77 PC-based Parameters Set-
ting Tool) or the Handy Terminal. The alarm-1 and alarm-2 LEDs
light up if an alarm occurs (those LEDs are provided only when
the output-2 is specified for alarm output).
ALM1
ALM2
Alarm-1 LED
(lights up if an alarm occurs)
Communications connector
(for connecting the
Handy Terminal)
Alarm-2 LED
(lights up if an alarm occurs)
* The LEDs are provided only when output-2
is specified for alarm output.
Fig. 7.1 Front Panel
7.2 Connecting the Setting Tools
Connect the modular jack-to-connector adapter (E9786WH) to the
JUXTA communication cable with 5-pin connector (F9182EE)
and then connect this adapter to the communication connector of
JUXTA.
JHT200
Handy Terminal
JUXTA communication cable with
5-pin connectors (F9182EE)
[Provided with VJ77, JHT200]
Modular jack conversion
adapter (E9786WH)
[Provided with VJ77]
Dedicated adapter (E9789HA)
[Provided with VJ77]
Dedicated cable (E9786WK)
[Provided with VJ77]
PC
Fig. 7.2 Connecting the Setting Tools
8. SETTING PARAMETERS
Set the parameters using a PC (VJ77 PC-based Parameter Setting
Tool) or the Handy Terminal. Refer to the list of parameters in this
manual and the Instruction Manual for Handy Terminal (IM JF81-
02E) or VJ77 PC-based Parameters Setting Tool (IM 77J01J77-01E).
8.1
Settings Related to Inputs and Outputs
8.1.1
Input range
Set the input range in P10: ZERO ADJ1 (setting of 0% of input)
and in P11: SPAN ADJ1 (setting of 100% of input). Refer to “6.
External Wiring” of this manual, and connect the signal cable from
potentiometer to VJS7.
Input the value equivalent to 0% of input to VJS7, then, wait for
10 seconds. And select and set EXECUTE in P10: ZERO ADJ1.
Also, input the value equivalent to 100% of input to VJS7, then,
wait for 10 seconds. And set and select EXECUTE in P11: SPAN
ADJ1. The input range is set after completing the above opera-
tions.
8.1.2
Setting of Burnout
Select and set OFF, UP, or DOWN in D30: BURN OUT.
8.1.3
Direction of Output Action
Analog output signals can be reversed. To reverse the signal from
output-1, set D38: OUT1 DR to REVERSE. For output-2, set D39
OUT2 DR to REVERSE. To return the output-1 signal to normal,
set D38: OUT1 DR to DIRECT. For output-2, set D39: OUT2 DR
to DIRECT.
8.2
Settings Related to Communication
Function
Set the following parameters when output-2 is specified for com-
munication function. For more information on the communication
function, see the Instruction Manual for VJ Series Communication
Function (IM 77J1J11-01E).
8.2.1
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.
8.2.2
Communication Address
Set the address number of the isolator numerically in a range of 1
to 99 in F02: ADDRESS.
8.2.3
Baud Rate
Set the baud rate by selecting from among 1200, 2400, 4800, and
9600 bps in F03: BAUD RATE.
8.2.4
Parity
Select and set NONE, EVEN, or ODD in F04: PARITY.
8.2.5
Data Length
Select and set 7 bits or 8 bits in F05: DATA LEN.
8.2.6
Stop Bit
Select and set 1 bit or 2 bits in F06: STOP BIT.
8.3
Settings Related to Alarm Output
Set the following parameters when output-2 is specified for alarm
output.
8.3.1
Alarm Setpoints
Set the alarm setpoints of alarm-1 and alarm-2 in E03: SET
POINT1 and E04: SET POINT2 numerically.
●
Setting range: A range of 0 to 100% of input range
●
Setting resolution: 0.1%
