Yokogawa JUXTA VJX7 - Manual (Page 3)

3
All Rights Reserved. Copyright © 1999, Yokogawa M&C Corporation IM 77J1X07-01E 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 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.)
RLY 1
RLY 2
Contact output-1 LED
(lights up if an alarm occurs)
Communications connector
Contact output-2 LED
(lights up if an alarm occurs)
* The LEDs are provided only when output-2
is specified for contact 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 Handy Terminal
8. SETTING PARAMETERS
Set the parameters using a PC (VJ77 PC-based Parameters 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) and VJ77 PC-based Parameters Setting Tool (IM 77J01J77-
01E).
8.1 Settings Related to Inputs and Outputs
8.1.1 Input Type
Set by selecting input type from among VOLTS (DC voltage) and
CURRENT (DC current) in D16: INP TYPE.
8.1.2 Input Hard Range
Set by selecting the input hard range from among AUTO, HIGH,
MIDDLE, and LOW in D17: SELECT RANGE. Generally, select
AUTO.
● AUTO: Sets the input hard range automatically with respect to
the input range to be set.
● HIGH: For a span of 5 V or more in an input range of -10 to
+10 V
● MIDDLE: For a span of 2.5 V or more in an input range of -5
to +5 V
● LOW: For a span of 0.5 V or more in an input range of -1 to
+1 V
NOTE
The conditions for the input hard range (HIGH, MIDDLE,
and LOW) are specified for operations within the range of
accuracy rating. The input range may be set to a range not
meeting these conditions, but take note of accuracy limita-
tions. Similar accuracy limitations exist even when AUTO
is selected. For more information on accuracy limitations,
see the general specifications of VJH7 (GS 77J1H07-01E).
8.1.3 Input Range
Set the 0% value of input range to D22: INPUT1 L_RANGE and
the 100% value of input range to D23: INPUT1 H_RANGE within
the numerically specified range.
8.1.4 Selection of Program Function
Select the following communication functions in D32:PRGM SE-
LECT.
(A) free program, (B) moving average, (C) dead time, (D) first-or-
der lag, (E) first-order lead, (F) velocity limiter, (G) limiter, (H)
velocity computation, (J) linearizer, and (K) ratio setter
8.1.5 Computation Cycle Time
Set the computation cycle time by selecting either 100 ms or 200
ms in D35:CYCLE TIME.
8.1.6 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.