COMECO TC67U Manuale utente
COMECO Inc., P.O.Box 378, Plovdiv 4000, BULGARIA, tel: +359 32 646523, 646524, fax: 634089
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.
Altri manuali per TC67U
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