COMECO TC67U User manual

COMECO Inc., P.O.Box 378, Plovdiv 4000, BULGARIA, tel: [phone], 646524, fax: 634089
e-mail: [email protected]g, WWW.COMECOGROUP.COM
TC67U
OPERATION MANUAL
Please read this Operation Manual before mounting and operating!
Save the Manual for future references!
PROGRAMMABLE PROCESS INDICATOR
v5-1-03.13

Overview 2
TC67U is a low-cost multifunctional
programmable process indicator
with a universal input that accepts
the most common RTDs, thermocouples,
and linear signals. The device can be
equipped with up to 2 alarm outputs,
which can control various actuators
using ON/OFF control algorithm,
and an optional RS485 interface enables
networking. The TC67U indicator allows
adjusting of the built-in digital filters and
the programmable output delay, resulting
in increased operation reliability in case
of industrial interferences.
Input Setting
J1
J2
J1 J2
Input type Short out
0...10 V J2
all the rest J1
♦Open the case to reach
the configuration jumpers J1 and J2,
located on the main board.
♦To set the desired input type,
short out the respective
configuration jumper.
case 'H'
case 'D4'

Mounting 3
♦Place TC67U
into a 90x42 mm (for case 'H') or
136x66 mm (for case 'D4') panel cut-out.
♦Tighten it into place using the enclosed
mounting brackets.
Electro-Magnetic Interference (EMI) Issues
Important note:
A built-in RC noise
suppression circuit may
be connected in parallel
with relay contacts.
Full AC voltage isolation
may NOT be provided
when relay contacts
are open.
Small AC current
(≈1.5 mA at 230 VAC)
may still flow through
the RC circuit!
♦All signal wires must be shielded.
They must not be packaged together
with power cables!
♦Never lay the signal wires close
to inductive or capacitive noise sources,
such as relays, contactors, motors, etc.!
♦All shields have to be grounded ONLY
at one end, as closer as possible
to the indicator terminals!
♦Avoid sharing supply lines with powerful
consumers, especially with inductive loads,
switched on and off.
♦To stop unwelcome interference signals
entering through the power supply lines,
use shielded 1:1 isolation transformer!
♦Shunt all switched (not only those switched
by the indicator) inductive consumers
with special suppression networks:
RC group and varistor - for AC loads,
or diode - for DC loads.
♦If the indicator operates in a very powerful
EMI area, it has to be mounted inside
a grounded metal shielding box!
♦To protect the interface
from electromagnetic disturbances,
follow the RS485 standard guidelines.

Wiring 4
Important notes:
♦Power supply must be turned off
during mounting and wiring!
♦In case of 90...250 VAC/DC power supply,
grounding the device through terminal (A)2
is mandatory for covering safety standards.
♦Strictly observe the requirements
for RS485 network building!
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.
Voltage transmitters
should be powered
ONLY
by external source!
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.
Power supply wiring
Connect the right power
supply voltage for your device
(see 'Specifications')
through the respective
terminals.
More detailed
wiring schematics
are available at
comecogroup.com
under 'Support' tab.

Parameter Programming 5
Some parameters
are accessible only
when the respective
functionality is installed.
(see 'Specifications').
- Changing
Point Position value
reflects on the real value
of all parameters
with ISU!
E.g.: changing
Point Position value
from (0) to (0.0)
would change
a Set-point value
of 100 to 10.0!!!
Device parameters
TC67U is a programmable device whose
service behavior is determined by a set
of parameters. All the parameters, along
with their names, symbols, and value ranges,
are given in Table 1.
Setting numerical parameter value
♦Enter parameter value adjustment mode
(see 'Program Levels').
♦The whole part of the value together with
the left zeroes appears on the display,
and the rightmost digit blinks.
♦To select another digit, press .
♦The 3 rightmost digits can accept values
from 0to 9, and the leftmost digit
can also accept the values -and `.
♦To increase or decrease the blinking digit
value, use respectively or .
♦Confirm the adjusted value by pressing
simultaneously + or + .
♦If the new value has not been confirmed
and no key has been pressed for a certain
period of time, value adjustment
automatically ceases, and the parameter
retains its initial value.
Setting symbolic parameter value
♦Enter parameter value adjustment mode
(see 'Program Levels').
♦Read the blinking parameter value.
♦To change the value, use or ,
and to confirm, press +
or + .
♦If the new value has not been confirmed
and no key has been pressed for a certain
period of time, value adjustment
automatically ceases, and the parameter
retains its initial value.

Parameter Symbol Description
Parameters of Level L3
Input Type inP Type of signal that can be connected to the device input
Unit unit Temperature measurement unit
Point Position Pnt Display decimal point position
Input Low ILo Display value at low limit of the linear input range
Input High IHi Display value at high limit of the linear input range
Input Correction Icr Constant to be added to the measured input value
Address Addr Device address
Baud Rate bAud Serial interface rate
Gradient GrAd Maximum admissible input change for 120 ms sampling period
Filter Time \t Relative time constant of the input filter
Filter Band \b Zone around the measured value, within which the filter is active
SP Limit Low %[L Set-point low limit
SP Limit High %[H Set-point high limit
Direction 1 diR1 Control action direction of output K1
Direction 2 diR2 Control action direction of output K2
Parameters of Level L2
+Differential 1 [e1 Relay switching differential over set point for output K1
-Differential 1 me1 Relay switching differential under set point for output K1
Time On 1 ym1 ON duration of pulsed output K1
Time Off 1 y\1 OFF duration of pulsed output K1
Hold 1 HLe1 Holds the output K1 reaction
The same 5 parameters, but with index 2- for output K2
Parameters of Level L1
Set Point 1 %[1 Set-point value of output K1
Set Point 2 %[2 Set-point value of output K2

Table 1
Value Unit Notes
Pyh, Pyt - Pt100: -100…850 °C, Pt1000: -100…600 °C
Ptx1,Ptx2 - PTC 1k: -50...150 °C, PTC 2k: -50...150 °C
R)1 - resistive linear: 0…1 kΩ
yc-b - T/C "B": 200...1800 °C
yc-J - T/C "J": -20...1000 °C
yc-" - T/C "K": -20...1300 °C
yc-r - T/C "R": 0...1700 °C
yc-S - T/C "S": 0...1700 °C
yc-t - T/C "T": -40...400 °C
u- voltage linear: 0…100 mV
I)20, I$20 - current linear: 0…20 mA, 4…20 mA
w)10 - voltage linear: 0…10 V
.C, .F - °C, °F
0, 0.0, 0.00, 0.000 - when indicating values with the input-signal measurement unit (ISU)
-1999 ... 9999 ISU These parameters make sense ONLY in case of a linear input signal!
-1999 ... 9999 ISU display offset value
1…254 -
!2, @4, $8, (6 bps 1200, 2400, 4800 (factory-set), 9600 bps
0 … 9999 ISU used for input peak filtration; value '0' cancels the filtration
0 … 999 - This parameter and the following one define a low-pass input filter.
0 … MISU temperature: whole part of M≤100; linear: M= 25% of input range
within input range ISU These parameters keep the set points in safe limits,
preserving them from random changes.
cooL, hEAt - 'cooling' - activates over set point, 'heating' - activates under set point
0 ... 9999 ISU less than (high range limit - Set Point 1)
0 ... 9999 ISU less than (Set Point 1 - low range limit)
0 ... 9999 sec. pulse duration; value '0' disables pulse mode
0 ... 9999 sec. pause duration; value '0' disables pulse mode
0 ... 9999 sec. Value '0' disables hold mode.
-1999 ... 9999 ISU within range SP Limit Low ... SP Limit High

Program Levels 8
Basic level
At power-on, TC67U enters Basic level.
At this level, the device indicates
the measured input value (PV)
with a resolution, according to
the Point Position parameter.
♦If the whole part of PV cannot be
entirely displayed, the unit generates
blinking 'overflow' messages
(oL or -oL, depending on PV sign).
♦If PV is out of its operating range
(the input range according
to Table 1, extended by 5%
on both sides), the device displays
blinking symbolic messages:
<__> (under-range) or
{++} (over-range).
When PV is out of physical range,
the unit displays ----.
♦Upon entering Basic level, TC67U
may display the init message,
indicating that some time is necessary
for filter initialization.
♦The noiS message may appear
as a result of the peak filter operation
(see 'Input filtration').
Set-point adjustment (Level L1)
♦To enter Set Point 1 adjustment mode,
press and hold until %[1
appears on the display. Release the
key to view the set-point value.
♦To enter Set Point 2 adjustment mode,
follow the same procedure,
but start with the key.

Program Levels 9
Programming (Levels L2 and L3)
♦Enter from Basic level
by pressing and holding .
♦To access and adjust the parameters
from level L2, release the key
while PAr is displayed.
To enter level L3, release the key
when conF appears on the display.
♦Choose a parameter using or .
♦To enter parameter value adjustment
mode, press .
♦If no key has been pressed
for a while, the device automatically
returns to Basic level, storing all
confirmed changes.
♦For quick exiting and saving,
use key combination + .
Output Control
Alarm output operation
♦The alarm outputs operate according
to the control algorithm parameters.
♦The outputs deactivate
with the value change
of one of the following configuration
parameters - Point Position,Input Low,
Input High, and Input Correction -
and remain inactive till Basic level
is entered.
♦The outputs deactivate also
when an error has been detected
(see 'Error messaging')
and remain inactive until all
discrepancies are resolved
and programming exited.
♦An input failure
deactivates the outputs too.

Output Control 10
ON/OFF control algorithm
The static characteristic
of an alarm relay controlled
by an ON/OFF algorithm
is shown on the left drawing.
Output hold
For eliminating undesirable
output switches, additional
parameter (Hold) is assigned
to hold the output reaction
for certain period of time.
Output pulse mode
When an output is activated
by the control algorithm,
it can either stay ON or pulse
depending on Time On and
Time Off parameter values.

Input Filtration 11
Peak filter
This filter is intended for eliminating
pulse spikes (peaks), which can appear
in the input signal, in the following way:
♦TC67U measures the input signal value
every 120 ms (sample time).
♦The measured values are compared
subsequently. The filter checks
the difference between the last
2 samples. If it does not exceed
Gradient value, the device accepts
the signal as normal.
♦If the last measured value differs
from the previous one by more than
the Gradient value, the filter output
is held until the device determines
a presence of a normal signal.
It is possible only if the input signal
has not been changed with more than
the Gradient value for 4 subsequent
samples.
♦If the device has not determined
a normal signal for 20 subsequent
samples, noiS appears on the display
(see 'Basic level').
Low-pass filter
This first-order filter acts ONLY within
a certain band around filter output value.
This has been designed to cut periodic
noises outside the communication signal
spectrum.
♦Filter operation is defined by two
parameters:
Filter Time (defines filter time constant) and
Filter Band (defines filter active band
around filter output value).
♦If the newly measured value differs
from the filter output by more than
Filter Band, the filter resets
with a new initial output value
(newly measured value).

Error Messaging 12
Message Parameters Error type
FAiL all incorrect memory
br" - service required
ER01 GrAd out of range
ER02 \t out of range
ER03 \b out of range
ER04 %[L out of range
ER05 %[H out of range
ER06 %[L,%[H %[L> %[H
ER11, ER21 ym1,ym2 out of range
ER12, ER22 y\1, y\2 out of range
ER13, ER23 HLe1,HLe2 out of range
ER14, ER24 [e1,[e2 out of range
ER15, ER25 me1,me2 out of range
ER16, ER26 %[1,%[2 outside %[L...%[h
ER17, ER27 %[x-mexunder input range
ER18, ER28 %[x +[exover input range
ER29 Addr out of range
♦In some cases, TC67U
finds discrepancies
in parameter values
that must be resolved
before operating
at Basic level.
♦The device indicates
such kind of problems
by displaying
error messages
as given on the left.
♦If FAiL appears
on the display,
try debugging
by turning
the power off/on.
♦If the problem persists,
press and hold or
send command error 0
via the communication
interface to restore
the default (factory)
settings.

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...999
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
the 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 Uхcommand,
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 U255, check
the UART protocol settings,
chiefly Baud Rate value.

Communication Protocol 14
Notes:
♦TC67U adds 3 spaces
in the beginning of the response.
♦TC67U returns decimal point
even when the value is integer.
♦#13 (CR) is byte 0x0D;
#10 (LF) is byte 0x0A.
♦The U255 command should be used
only in case just 1 slave is presented.
Protocol examples:
PC or other device: TC67U response:
activating device number 10
U10#13#10 ok.#13#10
reading filter time
f.t#13#10 f.t 0015.#13#10
writing filter time of 30
f.t 30#13#10 f.t 0030.#13#10
reading input value of 27.5
p.v#13#10 p.v 027.5#13#10
invalid command.
command not recognized
parity error. parity error detected
not a number. attempt to write symbols
for numerical parameter
point error. value resolution greater
than parameter’s one
out of range. value out of range
unit is busy. writing is allowed only
to device at Basic level
read only. parameter is read-only
can't save. problem with writing
in non-volatile memory
♦The device remains active
until it receives another Uх
command, but with different
device address, a FAiL
error, or with reset.
♦Any Baud Rate value change
through the communication
interface also deactivates
the device.
Reading from a device
♦If the frame consists of
only 1 word, it is recognized
as a command for reading.
♦The device responds to it by
returning the same word and
its value, according to Table 2.
Writing in a device
♦If the frame consists of
2 words, it is recognized
as a command for writing.
♦With writing, transferred
are the same 2 words
that would have been
received at the respective
command for reading
from the device.
♦After successful writing,
the device responds with
the respective command
for reading, except for
the baud command.
Other device responses
♦When Error Info value is -1,
the device substitutes any
command for error reading.
♦TC67U responses in case
of incorrect protocol use
are given on the left.
Reset
To reset the device,
send command reset.

Declaration of Conformity 15
The undersigned hereby declares,
on behalf of COMECO Inc.,
that this device has been manufactured
in compliance with standards
EN 61000, EN 61010, and EN 61326,
and meets the requirements of Directives
2004/108/EC, 2006/95/EC, and 2011/65/EU.
Krasimir Darakchiev, CEO
COMECO Inc.
Waste Disposal
Do not dispose of
electronic devices
together with
household waste
material!
If disposed of within European Union,
this product should be treated
and recycled in accordance with the laws
of your jurisdiction implementing
the WEEE Directive 2002/96
on the Waste Electrical and Electronic
Equipment.

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
Ambient Temperature / Humidity
Protection Class: front / terminals
'H', 'D4'
programmable
up to 2
5A/250VAC with NO/NC contact
1A/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 V,
24 VDC, 12...24 V, isolated
.............................................
10...30 V, 30 mA, 24 VDC, 30 mA,
.............................................
less than 3 VA
≤±0.3% from span
≤±0.02% from span for 1 °C
≤±0.001%/Ωat Rlin. ≤50 Ω
≤±1 °C at air temperature -10…80 °C
-10…65 °C / 0…85% RH, non-condensing
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: [phone], 646524
fax: [phone], 646517
e-mail: [e-mail]
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.