background image

 
 

Output Control 

10

ON/OFF control algorithm 

The static characteristic 
of a 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. 

 

Содержание RT28U

Страница 1: ... 32 646523 646524 fax 634089 e mail info comeco org WWW COMECOGROUP COM RT28U with rotary encoder OPERATION MANUAL Please read this Operation Manual before mounting and operating Save the Manual for future references PROGRAMMABLE CONTROLLER v5 2 08 14 ...

Страница 2: ... and the optional RS485 interface enables networking RT28U 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 Input type Short out 0 10 V J2 all the rest J1 Open the case Follow the diagram on the left to find the configuration jumpers J1 and J2 located on the main board T...

Страница 3: ...ose 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 controller 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...

Страница 4: ...e 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 the RS485 network line via the respective and depending on the case type see Specifications terminals Power supply wiring Connect the right power supply voltage for...

Страница 5: ... value together with the left zeroes appears on the display and all digits blink To increase or decrease the value turn the encoder knob respectively UP or DOWN For fine adjustment turn the encoder slowly as to sense its positions For coarse adjustment turn the encoder curtly Confirm the adjusted value by pressing the encoder knob If the new value has not been confirmed and the encoder has not bee...

Страница 6: ...ative 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 dR1 Control action direction of output K1 Direction 2 dR2 Control action direction of output K2 Parameters of Level L2 Differential 1 e1 Relay switching differential over set point for output K1 Di...

Страница 7: ...2 4 8 6 bps 1200 2400 4800 factory set 9600 bps 0 999 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 M ISU 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 coo hEA cooling activates ov...

Страница 8: ...sides the device displays blinking symbolic message _ under range or over range When PV is out of physical range the unit displays Upon entering Basic level RT28U may display the ini message indicating that some time is necessary for filter initialization The noi message may appear as a result of the peak filter operation see Input filtration Set point adjustment Level L1 To enter Set Point 1 adju...

Страница 9: ...ile the device automatically returns to Basic level storing all confirmed changes For quick exiting and saving select the rtn parameter and press the encoder knob Output Control Control output operation The control 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 Inpu...

Страница 10: ...n 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 ...

Страница 11: ... 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 noi 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 ...

Страница 12: ... W26 1 2 outside L H W17 W27 x mex under input range W18 W28 x ex over input range W29 Adr out of range In some cases RT28U 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 FAL appears on the display try debugging by turning the power off on If the problem pe...

Страница 13: ... 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 Sym...

Страница 14: ... 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 FAL 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 i...

Страница 15: ... and meets the requirements of Directives 2004 108 EC and 2006 95 EC 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 Directive 2012 19 EU on waste electrical and electronic equipm...

Страница 16: ... 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 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 u...

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