COMECO RT284U - User Manual

Specifications
16
Case
Input
Outputs:
Electromechanical relay
SSR
MOS gate
Output for external SSR
- K1
- K2
Serial Interface
Power Supply
Excitation Voltage (Vaux)
Consumption
Measurement Error
Temperature Drift
RTD Line Error
Cold-junction Error
Operating Temperature / Humidity
Protection Class: front / terminals
 'B',  'H',  'V',  'Q',  'S',
 'L',  'R1',  'R2'
programmable
up to 2
5A/250VAC with NO/NC or NO contact
 1A/250VAC,  0.2A/250VAC
0.1A/60V, optically isolated
5...24 VDC, 30 mA
 relay,  SSR,  MOS gate,  for ext. SSR
 relay,  SSR,  MOS gate,  for ext. SSR
 RS485, isolated,
 RS485 for "PolyMonitor", isolated
 230 VAC,  90…250 VAC/DC,
 24 VDC,  12...24 VAC/DC,
 ...................................
 10...30 V, 30 mA,  ........................
less than 3 VA
≤ ± 0.3% from span
≤ 0.02% from span for 1 °C
≤ ± 0.001%/Ω at R
lin .
≤ 50 Ω
≤ ± 1 °C at air temperature -10…80 °C
-10…65 °C / 0…85% RH
 IP65,  IP54 / IP20
Warranty and Support
………………………….
serial number
………………………….
manufacturing date
QC check mark …….……(passed)
(stamp)
88 Slavyanska Str.
P.O.Box 378
Plovdiv 4000, BULGARIA
tel: +359 32 646523, 646524
fax: +359 32 634089, 646517
e-mail: support@comeco.org
QD-8.2.4-WC
Warranty
COMECO warrants this product
to be free from defects in materials
and workmanship for 2 years. If your unit
is found to be defective within that time,
we will promptly repair or replace it.
This warranty does not cover accidental
damage, wear or tear, or consequential
or incidental loss. This warranty
does not cover any defects caused
by wrong transportation, storage, installation,
or operating (see 'Specifications').
Technical support
In the unlikely event that you encounter
a problem with your COMECO device,
please call your local dealer or contact
directly our support team.
COMECO Inc., P.O.Box 378, Plovdiv 4000, BULGARIA, tel: +359 32 646523, 646524, fax: 634089
e-mail: info@comeco.org, WWW.COMECOGROUP.COM
RT284U
with keyboard
OPERATION MANUAL
Please read this Operation Manual before mounting and operating!
Save the Manual for future references!
Wiring
4
Important notes:
♦ Strictly observe the requirements
for RS485 network building!
♦ With DC power supply,
the polarity does not matter.
♦ In case of 90...250 VAC/DC power supply,
grounding the device via separate wire
is mandatory for covering safety standards.
Input signal wiring
Connect the input
with regard to its type
through the respective and
depending on the case type
(see 'Specifications')
terminals on the device
back.
3-wire current
transmitters can be
supplied from Vaux.
Voltage transmitters must
be supplied externally!
Output wiring
Connect the outputs
with regard to their types
(see 'Specifications')
via the respective terminals.
RS485 wiring
Connect the unit
to RS485 network line
via the respective
terminals (connector).
Power supply wiring
Connect the right
power supply voltage
for your device
(see 'Specifications').
More detailed
wiring diagrams
are available at
comecogroup.com under
'Support' tab.
Communication Protocol
13
Table 2
Parameter Symbol
Value
Input Type
inp
pt100, pt1000,
ptc1, ptc2,
r.0.1k,
t.c.b, t.c.j,
t.c.k, t.c.r,
t.c.s, t.c.t,
u, u.0.10,
i.0.20, i.4.20
Unit
unit
c, f
Point Position
pnt
0, 1, 2, 3
Input Low
i.hi
-1999...9999
Input High
i.lo
-1999...9999
Input Correction
i.cor
-1999...9999
Address
addr
1...254
Baud Rate
baud
1200, 2400,
4800, 9600
Gradient
grad
0...9999
Filter Time
f.t
0...9999
Filter Band
f.b
0...M
Input Value
p.v
*
Error Info
error
**
* Input Value (read-only)
numerical value with ISU
- measured input value
sat.lo
- ADC under-range
sat.hi
- ADC over-range
inp.br
- sensor break
break
- device failure
noise
- noisy measurement
** Error Info
0
- initializes non-volatile memory
-1
- error FAiL (read-only)
1...29
- errors ER01... ER29 (read-only)
Protocol architecture
♦ The protocol is based
on UART protocol with:
 Baud Rate - as defined
by parameter Baud Rate;
 Data bits - 8;
 Parity Control - Even;
 Stop bit - 1.
♦ ASCII protocol is used
for communicating,
and the information
is exchanged in frames.
♦ Each frame consists of 1,
or 2 words separated
by byte 32 (SPACE),
and ends with bytes 13 (CR)
and 10 (LF). The first word
in the frame denotes
a parameter 'Symbol'
as taken from Table 2 and
the second word (if needed)
is the parameter 'Value',
both spelled with only
small Latin letters, digits,
dots, and/or the '-' sign.
Device activating
♦ To respond to commands,
the device should be active.
♦ For a device to be activated,
it must receive a U х
command, where 'х' is
the value of the parameter
Address or the value '255' (if
device address is unknown),
and respond to it with ok..
♦ If a device does not respond
even to U 255, check
the UART protocol settings,
chiefly Baud Rate value.
PROGRAMMABLE CONTROLLER
v
27-05.12

Summary

Overview

Input Setting

Diagrams for configuring input signal types using jumpers J1 and J2 on the main or right board.

Waste Disposal

Mounting

Panel mounting

Instructions for fitting the RT284U into a panel cut-out using mounting brackets.

Rail mounting

Guidance for mounting the device on a 35 mm rail using specific mechanisms.

Wiring

Input signal wiring

Connecting input signals based on their type to the respective device terminals.

Output wiring

Connecting output signals according to their types to the respective device terminals.

RS485 wiring

Connecting the unit to the RS485 network line via specific terminals.

Power supply wiring

Connecting the correct power supply voltage for the device.

Communication Protocol

Protocol architecture

Details on the UART protocol, ASCII usage, frame structure, and data exchange.

Device activating

How to activate the device using commands and troubleshoot non-response issues.

Parameter Programming

Controller parameters

Explanation of how device behavior is determined by parameters listed in Table 1.

Setting numerical parameter value

Procedure for adjusting numerical parameters using the device keys.

Setting symbolic parameter value

Procedure for adjusting symbolic parameters using the device keys.

Error Messaging

Error Messages

List of error messages, their types, and potential causes like out of range or service required.

Program Levels

Basic level

Displays measured input value (PV) with resolution; handles overflow/under-range.

Parametric level

Contains control algorithm parameters; accessible by pressing and holding key.

Configuration level

Contains configuration parameters; accessed by pressing and holding key from Basic level.

Specifications

Case

Available case types for the device.

Input

Specifies programmable input capabilities.

Outputs

Details on available output types: electromechanical relay, SSR, MOS gate.

Power Supply

Specifies available power supply options for the device.

Measurement Error

Defines the measurement accuracy and temperature drift specifications.

Protection Class

Specifies protection ratings for the front and terminals.

Warranty and Support

Warranty

Details the 2-year warranty against defects in materials and workmanship.

Technical support

Contact information for local dealers or direct support for device issues.

Input Filtration

Peak filter

Eliminates pulse spikes by comparing consecutive input signal measurements.

Low-pass filter

Cuts periodic noises within a band around the filter output value.

Output Control

Control output operation

How control outputs operate based on algorithm parameters and error states.

Algorithm output

Illustrates the static characteristic of a relay controlled by an ON/OFF algorithm.

Output hold

Using the 'Hold' parameter to temporarily halt output reaction for stability.

Output pulse mode

Configures relay output to pulse ON/OFF based on Time On and Time Off parameters.

Declaration of Conformity

COMECO RT284U Specifications

General

Brand	COMECO
Model	RT284U
Category	Controller
Language	English