Yokogawa JUXTA VJP8 - Manual (Page 3)

3
All Rights Reserved. Copyright © 1999, Yokogawa M&C Corporation IM 77J01P08-01E 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.
Communications connector
* 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 Setting Tools
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 Display Unit
The input display unit is used for referring the input signal. Select
and set "Hz" or "kHz" in D10: UNIT.
8.1.2 Pulse Rate
Set the pulse rate within the numerically specified range in D41:
PULSE RATE.
Setting range: 0.0001 to 2.0000(settable up to 4 decimal
places)
When the pulse width type is set to
"THROUGH" (no change), effective range
is 0.0001 to 1.0000.
8.1.3 Pulse Width Type
Select and set "THROUGH" or "ON PULSE" in D42: PULSE
TYPE..
THROUGH: Outputs ON-state pulse time of frequency
as it is.
ON PULSE: Outputs ON-state pulse time after chang
ing it to the set value.
When the instrument is used as a pulse signal repeater, set the
pulse width type to "THROUGH", and the pulse rate to "1."
8.1.4 Pulse Width Time
The pulse width time is set when the pulse width type is set to "ON
PULSE."
Select and set "12.5
␮s", "50␮s", "100␮s", "12.5ms", "30ms",
"50ms", or "100ms" in D43: PULSE WIDTH.
8.1.5 Input Filter
When the chattering noise is generated in input, the input filter is
used to restrain the influence.
Select and set "ON" in D50: INPUT FILTER, then the input filter
for time constant of about 10ms will be connected.
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.
8.2.7 Input Decimal Point Position
Namber of digits of decimal places can be set.
Select and set among 0 to 5 digits in F07: INPUT DEC PT.