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Siemens 

TX-I/O™ Module system – Functions and operation 

CM110561en_08 

Building Technologies 

Digital output functions 

2018-10-25 

5.5  Pulse, on/off 

 

(BO Pulse On-Off / Q250-P250A-P)

 

 

 
Switching of single-stage electrical loads (electrical consumers)  

•

  1 N/O contact and 1 N/C contact for self-latching  (Q250-P) 

•

  2 N/O contacts for two-coil switches 

 

(250A-P) 

 
The following functions can be implemented by use of external circuits (and see the 
connection diagrams in the data sheets): 
–  If the control voltage for the self-latching mechanism fails, the loads are not 

automatically enabled when power is restored, even in the case of manual override. 
Example: power restoration circuit 

–  If the bus master fails, the loads are not disabled. 

Example: lighting controls 

–  Two or more open loop control circuits can switch the same load. 
–  Override is also possible from one or more remote switching locations. 
 

•

  Connection diagrams: see module data sheets. 

•

  Step switches, pulse switches, bistable relays: see Q250,  section 5.2. 

 
 

•

  The function uses two I/O points which must be on the same module and adjacent to 

each other. 

•

  The TX-I/O relay modules have changeover contacts 

 
 

•

  The I/O point with the lower number (n) is used for the OFF command 

•

  The I/O point with the higher number (n+1) is used for the ON command 

•

  The process value can be written in "Normal" mode or in "Trigger" mode.  

The latter option is used in cases where there is more than one source, e.g. with 
lighting applications.  

•

  The pulse times can be set as parameters:  

–  0.1...25.5 s (Parameter 

Pulse Time

) (default = 0.5s) 

– 

P-bus BIM

: 0.5...25 s  

•

  The break time can be adjusted 0...25.5 (default = 0.1s) 

•

 

P-bus BIM

: The break time is fixed to 0.1 s 

 
Each change in the process value generates an ON or OFF command: 

Process value 
 

Relay (n+1) 
"ON" 

Relay (n) 

"OFF" 

 

Pulse/pause time  
 
I/O status LED (n+1) 

 

I/O status LED (n) 

 

BreakTime

BreakTime

PulseTime

PulseTime

Active
Inactive

Relay Active

Relay Inactive

Relay Active

Relay Inactive

105

61

D

03

ON

OFF

ON

OFF

 

 

Application 

Notes 

Hardware 

Function 

Summary of Contents for TX-I/O TXM1.16D

Page 1: ...s 10562p001 TX I O Functions and operation CM110561en_08 2018 10 25 Building Technologies ...

Page 2: ... 3 3 Status indication pulse contact P Bus BIM D20S realized with BI Static 15 3 4 Pushbutton input BI Push NO BI Push NC 17 3 5 Multistate input maintained contact MI Switch 20 3 6 Counting pulse contact CI Mech 10 25 Hz CI El 100Hz C 22 4 Analog input functions 24 4 1 Measurement 24 5 Digital output functions 26 5 1 General information on the digital outputs 26 5 2 Maintained contact switchover ...

Page 3: ...t address Section 4 1 Note on open circuit detection with U10 01 2009 Rev _03 Added Version 4 functions 01 2008 Rev _02 Section 5 1 Note on 4QD M2 Section 5 9 Note on synchronization 03 2007 Rev _01 First edition 1 2 Key target groups Project managers Consulting engineers Service engineers Control panel manufacturers 1 3 Contents and validity of this manual This manual describes all functions avai...

Page 4: ... Siemens regional companies are available at www buildingtechnologies siemens com Before using our products it is important that you read the documents supplied with or ordered at the same time as the products equipment applications tools etc carefully and in full We assume that persons using our products and documents are authorized and trained appropriately and have the technical knowledge requi...

Page 5: ...O module assemblies normally called I O modules consist of a terminal base and a plug in module I O point Smallest addressable unit in an I O module One or more I O points e g three stage switching output correspond to each data point channel on the room automation station automation station Terminal The cables of the field devices peripheral devices are connected to the terminals Plug in module T...

Page 6: ...erature LG Ni 1000 1 8 8 8 8 8 AI 2500 Ohm Resistance 2500 Ω 1 8 8 8 8 8 AI Pt1000 Resistance 2500 Ω Pt 1000 1 8 8 8 8 8 AI NTC10K Temperature NTC 10 K 1 8 8 8 8 AI NTC100K Temperature NTC 100 K 1 8 8 8 8 AI T1 PTC Temperature T1 PTC 1 8 8 8 8 AI 0 10V Voltage DC 0 10V 1 8 8 8 8 AI 4 20mA Current DC 4 20 mA 1 8 8 AI 0 20mA Current DC 0 20 mA for 25 mA see CM10563 1 8 8 Digital outputs BO Relay NO ...

Page 7: ...rride button not available on all types I O status LEDs green on certain types three color Combined slotted recessed head screws from mid 2012 2 2 LED indicators 2 2 1 Module status LEDs The module status LED green is located on the I O module under the transparent address key It shows the status of the module as a whole as opposed to the status of the I O points Description LED Normal ON Module O...

Page 8: ...rors Several flashing patterns For details about errors please refer to the section Indication operation and diagnostics in the TX I O Engineering and installation guide 6 1 On certain module types the LEDs are three color If the I O function supports it the LED can display Alarm Red and Service Yellow in addition to Normal Green default 2 2 3 LCD display The following information is displayed for...

Page 9: ...ollows StaFlg Overridden PrVal set value Local override can be disabled for each single I O function All safety related functions must be implemented with external solutions The local override must not be used for safety switch off In compliance with the standard ISO 16 484 2 Section 3 110 the module executes all local overrides directly without safety precautions or interlocks Full responsibility...

Page 10: ...has its full functionality The module address is mechanically encoded in the address key Based on to the address the module receives information via the bus indicating which field devices are connected to this address and which function is required for the field devices When replacing the plug in I O module the address key must FIRST be swiveled outward This causes the load to be switched off and ...

Page 11: ...AC DC24 V is not present The PowerDownModeAC24V becomes active Remark Ifparameter PowerDown ModeAC24V is set to Keep the PowerDownModeAC24V will not become active and the fault will not be set With modules from Series D however it is compulsory to feed AC 24 V to bus conductor V The module always monitors this supply Simatic It is also admissible to connect DC 24 V to bus conductor V Unreliable Ot...

Page 12: ...h 3 1 Status indication maintained contact BI NO BI NC D20 D20R Acquisition of status signals from volt free contacts and electronic switching devices such as transistors and optocouplers The status signals can be triggered by Two position transmitters such as thermostats and pressure switches etc Status contacts of devices and auxiliary contacts of starters switches Electronic switching devices s...

Page 13: ...ration can be selected Contact_NO default Contact_NC As a result The I O status LED is activated The process value is communicated over the bus The LCD is activated Digital inputs cannot be overridden locally The override button has no effect and if an attempt is made to operate it an error is displayed The I O status LED shows the source signal The LCD panel if available shows the source signal t...

Page 14: ...ction The signal is read and debounced on hardware level An additional debounce time is available 0 25 5 s default 0 s The pulse is then saved and transmitted to the bus master The bus master acknowledges receipt Acknowledge The memory is cleared the LED goes off and the input is ready for a new pulse Additional incoming pulses before the Acknowledge are ignored The signal operation can be selecte...

Page 15: ... the bus master it makes no sense to store old pulses Therefore the memory and the acknowledgment are bypassed and the pulses are displayed directly 3 3 Status indication pulse contact P Bus BIM D20S realized with BI Static Function for island bus See section 3 2 Used for the acquisition of status pulses from volt free pulse contacts and electronic pulse transmitters such as transistors and optoco...

Page 16: ...has no effect and if an attempt is made to operate it an error is displayed The I O status LED shows the source signal The LCD panel if available shows the source signal type status contact N O and the activity of the contact However for quickly changing signals a maximum changing frequency of 5 Hz is maintained by the displays N O contact Acknowledgement P bus Process value P bus I O status LED L...

Page 17: ...tion Signal Processing PBI Event Process values Events I O status LED NO Contact UP BUS 10561z157 NO Contact DOWN Function diagram The signals are read and debounced on hardware level The pulses are interpreted and converted to corresponding events The function then sends events at the start the end and partially during the pulse standard pulse patterns are Short pulse Long pulse Short double clic...

Page 18: ...e 1 or 2 simple dual button 1 tp Pulse length 0 1 25 5 s increment 0 1 s 0 5 s tr Repeat length 0 1 25 5 s increment 0 1 s 1 0 s td Double click length 0 1 25 5 s increment 0 1 s 0 5 s Enable Flags If set If not set Default Positive Edge Enable Rising slope sent Rising slope not sent Disabled Stop Long Enable Sends Tg 6 at the end of a long pulse Falling slope for long pulse Tg 6 not sent Disabled...

Page 19: ... Tg 3 Tg 2 Tg 7 td td tp Tg 8 tp Tg 2 Tg 7 td tp Tg 9 Tg 6 tr tr ShortDoubleClick enabled Rising slope Long pulse Long double click Falling slope tp tr Tg 2 Tg 4 Tg 5 Tg 6 tr tr td tp tr Tg 2 Tg 4 td Tg 10 tr Tg 11 LongDoubleClick enabled Rising slope Dual click both buttons simultaneously Falling slope tp Tg 2 UP DN Tg 12 Tg 13 DualClick enabled Digital inputs cannot be operated locally The I O s...

Page 20: ...ne by one or simultaneously The following mapping kinds can be parameterized parameter Mapping Kind 1 to n mapping Up down mapping Binary mapping The multistate process value is mapped so that the mapping table defines just one input to be active Before the process value MIValue changes a time delay SwitchOverTime must elapse in order to debounce mechanical contacts 0 22 5 s Default 0 4 s In the M...

Page 21: ...n n 1 n 2 3 3 n n 1 n 2 n 3 4 4 n n 1 n 2 n 3 n 7 8 8 The multistate process value is mapped so that the mapping table specifies one or more inputs to be active It is possible to have several active inputs Examples Enabling additional electrical heating or burner stages Active I O points MIValue Stage n n 1 n 2 n 3 n 7 0 0 0 0 0 0 0 1 0 0 0 0 1 1 0 1 0 0 0 2 2 1 1 0 0 0 3 3 0 0 1 0 0 4 4 1 1 1 1 1...

Page 22: ... accumulates them in the memory You can choose a mechnical or an electric counter under Pulse Generator mechanic contact Counting frequency up to 25 Hz electric contact Counting frequency up to 100 Hz Certain module types support lower frequencies see module data sheets and the overview in section 1 7 The value stored in memory is available in the process value P bus BIM The P bus is limited to 64...

Page 23: ...ails especially in relation to flashing pattern and errors refer to the section Display operation and diagnostics in the TX I O Engineering and installation guide 6 In the event of a communication failure the counter function is maintained The counter values continue to be accumulated are indicated by LED periodically buffered only if Power Up Last Value immediately after communication failure and...

Page 24: ...x AI NTC100K NTC100K 40 115 C 52 5 155 C 10 mK 25 C OFF Sensor type x x x AI T1 PTC T1 40 125 C 52 5 155 C 10 mK 25 C OFF Sensor type x x x Voltage AI 0 10V U10 0 10 V 1 5 11 5 V 1 mV variable variable x x x x Current AI 4 20 mA I420 4 20 mA 1 6 22 4 mA 1 µA variable variable x x x x AI 0 20 mA 5 I25 0 20 mA 3 0 23 mA 1 µA variable variable x x 1 180 600 150 and NTC only with reduced hum injection...

Page 25: ...description in 6 COV Limit and COV Period define the amount of change and the interval for updates to be sent on the island bus by the module As a result the I O status LED which describes the source signal is activated the process value is displayed on the LCD panel not for temperatures the process value is communicated over the bus Analog inputs cannot be overridden locally The override button h...

Page 26: ...fail can be parameterized BO Pulse On Off Section 5 5 Q250 P Q250A P On off pulse N O and N C contact BO Pulse Section 5 6 Pulse MO Steps Section 5 7 Maintained contact 1 mutually exclusive electronic relay interlock MO Pulse Section 5 8 Q M1 M4 Multistate pulse mutually exclusive electronic relay interlock BO 3 Pos Relay BO 3 Pos Triac Section 5 9 Y250T Pulse control signal three position output ...

Page 27: ... For each I O function local override can be disabled in the configuration For a full description see section 2 3 local override Self latching must be implemented externally to the I O modules The relay outputs associated with a function are mutually interlocked which means that these relays cannot be used independently of one another It is therefore recommended that contactors always be interlock...

Page 28: ...BO Bistable NO BO Bistable NC Behavior can be parameterized see section 5 4 BO Pulse On Off Q250 P Q250A P The relays are de energized The switch status of the power contactors is maintained due to self latching or dual coil relay The behavior can NOT be parameterized The relays are de energized MO Steps Q Mx The relays are de energized The switch status of the power contactors is maintained by me...

Page 29: ...n be selected Relay Default Relay_NA In the case of bus failure with DC 24 V module supply available the following backup states van be parameterized No Inactive default Value Active Inactive Keep Same value as before the bus failure Parameterization can be done during operation Pressing the override button in the middle enables disables the local override The yellow override status LED indicates ...

Page 30: ...s closed and the N C contact is open In the event of an error the I O status LED and the module status LED flash The meaning of the I O status LED can be parameterized TXM1 6R M only Normal green default Alarm Red Service Yellow For details especially in relation to flashing pattern and errors refer to the section Dis play operation and diagnostics in the TX I O Engineering and installation guide ...

Page 31: ...peration can be selected Triac Default Triac_NA In the case of bus failure with DC 24 V module supply available the following backup states van be parameterized No Inactive default Value Active Inactive Keep Same value as before the bus failure Parameterization can be done during runtime The I O status LED is ON when the triac is active i e when the N O contact is closed and the N C contact is ope...

Page 32: ...where the DC 24 V module supply is intact the following backup states can be parameterized No Same effect as Value Off Value On Off Keep Same value as before the fault default Delay before the backup state becomes effective 0 6553s default 120s steps of 0 1s Parameterizing can be made during operation A powerfail DC 24 V always induces a bus failure see above In case of powerfail AC 24 V Powerdown...

Page 33: ...y to feed AC 24 V to bus terminal V field device supply if there is a bus connection module TXM1 6RL The module always monitors this supply Simatic It is also admissible to connect DC 24 V to bus conductor V As a summary the I O points behave as follows Failure Behavior of relays Address key Bus AC 24 V Off Backup state Masterdown Backup delay Backup state Powerdown X X X X X X X X X X Module type...

Page 34: ...ction diagrams see module data sheets Step switches pulse switches bistable relays see Q250 section 5 2 The function uses two I O points which must be on the same module and adjacent to each other The TX I O relay modules have changeover contacts The I O point with the lower number n is used for the OFF command The I O point with the higher number n 1 is used for the ON command The process value c...

Page 35: ...command closes relay n 1 Pressing for one of the I O points generates an OFF command closes relay n The I O status LED of I O point n or n 1 lights up concurrently with the relay activity Local operation can be disabled in the configuration The I O status LED is ON when the relay is active In the case of an error the module status LED and the I O status LEDs assigned to the function flash For deta...

Page 36: ...s no pulse has been generated Writing to Process value Process value Relay ON Pulse pause time I O status LED BreakTime PulseTime Active Inactive Relay Active Relay Inactive 10561D04 ON OFF PulseTime 0 1Trg 1Trg 0Trg 1Trg 1 0 An additional ON or OFF pulse can be generated e g by means of the local override Pressing the override button in the middle enables disables local override When local overri...

Page 37: ...lowing mapping kinds can be parameterized parameter Mapping Kind 1 to n mapping Up down mapping Binary mapping The multistate process value is mapped so that the mapping table defines just one output to be driven Despite the interlocking of the contacts inside the module overlapping ON states can occur due to delayed release of the contactors or sticky contacts when switching from one stage to ano...

Page 38: ...ping table specifies one or more outputs to be driven It is possible to have several active outputs Examples Enabling additional electrical heating or burner stages MOValue Stage Active I O points n n 1 n 2 n 3 n 4 n 5 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 2 2 0 1 0 0 0 0 3 3 1 1 0 0 0 0 4 4 0 0 1 0 0 0 63 63 1 1 1 1 1 1 In the case of bus failure with DC 24 V module supply available the following backu...

Page 39: ... be used to switch through several stages until the function stops at the lowest stage The change from one stage to the next occurs only after a delay of 0 3 s This makes it possible to reach a stage directly e g jump from stage 2 to stage 0 and then to stage 3 Users themselves must know whether switch off is required before switching to another stage The Override LED of all I O points assigned to...

Page 40: ...its can switch the same load see connection diagrams in the data sheet Step switches pulse switches bistable relays see Q250 section 5 2 This feature covers the following signal type Signal type Description MO Pulse Q250 Px P bus BIM Q250 P3 only 1 to n mapping only PROFINET BIM Q250 P1 P4 only Pulse multistate with or without mutually exclusive electronic relay interlock depending on mapping kind...

Page 41: ...Inactive default Value Active Inactive Keep Same value as before the bus failure Parameterization can be done during runtime The I O status LED is ON when the relay is active In the case of an error the module status LED and all the I O status LEDs assigned to the function flash Pressing the middle of one of the override buttons assigned to the function enables disables local override When local o...

Page 42: ...e used if it is also supported by the bus master Value Description Value range Default Rise Time Time to OPEN 6 3 6553 5 s 150 0 s Fall Time Time to CLOSE 6 3 6553 5 s 150 0 s Break time Pause between opening and closing 0 25 5 s 0 1 s Reaction Time Series D and higher Additional runtime when traveling to or from 0 0 50 0 s 0 0 s Nz Dead band 0 10 1 Hys Hysteresis 0 10 2 Backup mode Response of pr...

Page 43: ...LE 1 5 Rise Time 100 or 1 5 Fall Time 0 SINGLEOPEN 1 5 Rise Time 100 SINGLECLOSE 1 5 Fall Time 0 EVERY10MIN 1 5 Rise Time 100 or 1 5 Fall Time 0 every 10 minutes EVERY10MINOPEN 1 5 Rise Time 100 every 10 minutes EVERY10MINCLOSE 1 5 Fall Time 0 every 10 minutes EVERY20MIN 1 5 Rise Time 100 or 1 5 Fall Time 0 every 20 minutes EVERY20MINOPEN 1 5 Rise Time 100 every 20 minutes EVERY20MINCLOSE 1 5 Fall...

Page 44: ...relays The fault message will only be sent when a command is pending Pressing the middle of one of the override buttons associated to the function enables disables local override When local override is active Pressing on one of the I O points operates the OPEN relay I O point n Pressing on one of the I O points operates the CLOSE relay I O point n 1 The I O status LED remains ON while the override...

Page 45: ...al parameterization Parameter Description Value range Default Increment TimePeriod Switching cycle 0 Special behavior 0 6553 5 s 20 s 0 1 s MinOnTime Min switch on time Protection against excessive switching frequency Preheating ensures that the thermal actuators open quickly 0 25 5 s 1 25 5 s if TimePeriod 0 1 s 0 1 s MinOffTime Min switch off time Protection against excessive switching frequency...

Page 46: ... 2 6573 5 s 2 20s 6553 5 s limited 2 0 any any any 100 any any any 1 Avoid Long MinOffTime and MinOnTime values require a long TimePeriod because outputs near 0 and 100 are changed to 0 or 100 2 Avoid Inputs near 0 greatly extend period process value AOValue has a resolution of 0 01 The max limitation of the function is 6553 5 s 1 8 h but a period this long does not make any sense Therefore the mi...

Page 47: ...ion in particular is responsible for the louver angle For this reason the process value is sent in both directions to the periphery as a command and to the bus master as a status signal I O processing LED AOBValue UP I O processing DOWN2 DOWN1 Current measurement I O processing Current measurement Channel selection current supervision pulse generation processing timing depends on configuration 2 o...

Page 48: ... preparameterized outputs are used customized to the actuators to be operated The following parameters are available for individual parameterization Parameter Description Range default Increment 0 01 s RunTimeDownUp Runtime from Down2 to Up 1 655 s 180 s RunTimeUpDown Runtime from Up to Down2 1 655 s 180 s RunTimeDown1Down2 Runtime from Down1 to Down2 1 655 s 1 5 s BreakTime Break between opening ...

Page 49: ...o flash memory Changes 15 are not saved as unbelievable If EndPosDetection once the motor current measurement is active the stroke model is synchronized in the end positions but the run times are only saved to the flash memory once after start up Command CAL can be used to force runtime measurement If EndPosDetection Inactive the module ignores the command Because of the current measurement interp...

Page 50: ...nce variables The function uses one I O point Configurable signal types Description Signal type Range over range Reso lution I O LED LCD Error indication Under over range Shorted Under range Over range Unreliable output Voltage output AO 0 10V Y10S 0 10 V 0 05 10 6 V 1 mV variable variable X X X Current output AO 4 20mA Y420 4 20 mA 3 92 20 96 mA 1 µA variable variable X X Unreliable output is dis...

Page 51: ... value and thus the status of the devices concerned is retained until the user overrides it the same applies after resumption of automatic operation until the bus master sends a new process value For a full description see page 9 The brightness of the I O status LED varies in proportion to the output value If an LCD panel is available it indicates the signal type DC 0 10 V DC 4 20 mA and displays ...

Page 52: ...ription see next page Relay modules TXM1 6R TXM1 6R M TXM1 6RL BO Default BO Relay NO 250V Q250 Triac module TXM1 8T BO Default BO Triac NO Blinds module RXM1 8RB MO Default 4 x MO Steps 2 stage Q M2 The default functions factory set I O module status have been specially designed for testing without a bus master With configured modules each I O point would react differently according to the signal...

Page 53: ... input Flashing 1 Hz E g DC24 V connec ted by mistake AC24 V at input Flashing 1 Hz AC24 V connected by mistake TXM1 8P RI Default 40 Ohm at input ON no LCD Especially short circuit 40 Ohm at input OFF no LCD Testing of TXM1 6R M TXM1 6RL TXM1 8T BO Default digital outputs Local override or tool override enabled ON OFF The module executes all local over rides or tool overrides directly without saf...

Page 54: ...e fields can be edited or filled via dropdown menu For settings in other building automation and control systems see the respective online help Note Issued by Siemens Switzerland Ltd Building Technologies Division International Headquarters Gubelstrasse 22 CH 6301 Zug Tel 41 41 724 24 24 Fax 41 41 724 35 22 www siemens com buildingtechnologies 2007 2012 Siemens Switzerland Ltd Delivery and technic...

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