YOKOGAWA UT35A-L, User Manual

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All Rights Reserved. Copyright © 2011, Yokogawa Electric Corporation
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GS 05P04D41-01EN Mar.14, 2016-00
Low Limit Control
When PV exceeds a setpoint (SP), “EXCEEDED” lamp
lights, and “OUT” lamp turns ON (point A). The limit
control output relay is de-energized then.
“EXCEEDED” lamp turns off when PV goes into normal
condition, while “OUT” lamp stays on as it is (point
B). “OUT” lamp turns off when a confirming operation
is done by an operator (point C). The way to confirm
is pushing the “RST” key (or by an external contact,
according to the setting of setup parameter CNF).
The confirming operation is not accepted during PV
exceeds SP (point D). State of output relay is de-
energized whenever “OUT” lamp is on. (NC terminal:
CLOSE, NO terminal: OPEN)
SP
PV
(A)
Confirmation
(accepted)
Hysteresis
EXCEEDED
Lamp
OUT Lamp
Output Relay
Operation
(RST key or
external contact input)
(B) (C) (A) (D) (B)
Confirmation
(not accepted)
lit lit
lit lit
off off
off
off
off
off off
on on
n
Control Computation Function
Alarm Functions
• Types of Alarm
Measured value
alarm
Deviation alarm
Rate-of-change
alarm
PV (measured value) high/low limit alarm
Deviation high/low limit alarm
Deviation high and low limits alarm
Deviation within high and low limits alarm
PV rate-of-change alarm
Other alarms
Self-diagnosis alarm
FAIL
• Alarm Functions
Alarm output
action
Alarm stand-by action
Alarm latch (forced reset) function
Alarm hysteresis
Alarm ON/OFF delay timer
Number of alarm
settings
3
Number of alarm
output points
3
Contact I/O Function
This function allows for allocating the input error
condition, operation condition, alarm condition or other
conditions to the contact input and contact output.
Contact input
Limit output confirmation (RESET) (DI1 fixed)
Alarm Latch release
PV red/white switching
LCD backlight ON/OFF switching
Message interrupt displays 1 through 4
Contact output Alarms 1 through 3
Communication Function
Function Method Interface Targets Max connection Communication
Data
Modbus/TCP
A standard industry protocol
allowing communications
between the controller and
devices such as PCs, PLCs,
and DCSs.
Server Ethernet PLC and others 2 connections
PV, SP, ALM,
etc
Gateway
Ethernet
+RS-485
RS-485:
UT55A/UT52A/
UT35A/UT32A/
UP55A/UP35A/
UM33A (*1)
31 units
Modbus
(RTU/ASCII)
Slave RS-485
PLC and others,
UT55A/UT52A/
UT35A/UT32A/
UP55A/UP35A/
UM33A (*2)
31 units
PC link
The proprietary Yokogawa
protocol allowing
communications to PCs,
PLCs and touch panels.
Slave RS-485
PC and others,
UT55A/UT52A /
UT35A/UT32A/
UP55A/UP35A/
UM33A(*2)
31 units
Ladder
A protocol to communicate
to PLCs.
*1: UT digital indicating controller, Signal conditioner JUXTA, Power monitor POWERCERT can be connected.
*2: UT digital indicating controllers can be connected.
Physical interface
Ethernet Standard : IEEE802.3 (10BASE-T, 100BASE-TX)
Max segment length : 100m
Max. Connecting Configuration : Cascade Max. 4 level (10BASE-T), Max. 2 level (100BASE-TX)
RS-485 Standard : EIA RS-485
Communication method : Two-wire half-duplex or four-wire half-duplex, start-stop synchronization,
and non-procedural
Baud rate : 600,1200,2400,4800,9600,19200 or 38400 bps
Maximum communication distance : 1200 m
Terminating resistor : 220Ω (External)