0562p001 s TX-I/O™ Functions and operation CM110561en_08 2018-10-25 Building Technologies
Contents 1 Introduction .................................................................................................3 1.1 Revision history .............................................................................................3 1.2 Key target groups ..........................................................................................3 1.3 Contents and validity of this manual .............................................................3 1.4 Other applicable documents ...............
1 Introduction 1.1 Revision history 10.2018, Rev. _08 08.2012, Rev. _07 02.2012, Rev. _06 Section 2.6, 4.1 Correction for PT100 4-wire Detail information concerning MO Steps (multistate maintained contact) New modules with new functions New signal types designations (for a comparison between signal types of different building automation and control systems see N8170) • Described all functions of the TX-I/O modules, even if not supported by all building automation and control systems • New: Section 5.
1.5 Before you start Copyright notice This document may be duplicated and distributed only with the express permission of Siemens, and may be passed only to authorized persons or companies with the required technical knowledge. Quality assurance notice These documents have been prepared with great care. • The contents of all documents are checked at regular intervals. • Any corrections necessary are included in subsequent versions.
1.6 Term Bus master Island bus (TX-I/O module bus) Power supply module Bus connection module Bus interface module (BIM) P-Bus-BIM PROFINET BIM I/O island I/O row I/O module (assembly) I/O point Terminal Plug-in module Terminal base Address key Reset key Addressing I/O function Process value Configuration Parameter setting Local override device, Tool override, "Functional test", etc.
1.7 Overview of TX-I/O™ functions The following functions are available in the TX-IO range: Digital outputs BO Relay NO 250V BO Relay NC 250V BO Triac NO BO Triac NC BO Bistable NO BO Bistable NC BO Pulse BO Pulse On-Off MO Steps MO Pulse BO 3-Pos Relay BO 3-PosTriac BO PWM BO Blind Relay Analog outputs AO 0-10V AO 4-20mA 8 8 1 8 16 8 8 8 8 1 8 16 8 8 8 8 8 8 8 8 8 8 8 8 1/2 8/4 16/8 2...8 4...1 8...
2 Indicators and operator controls 2.1 Overview (example: super universal module) Connection terminals (No. 1 screwdriver for slotted or recessed-head * screws) with test point (1.8 ...
2.2.2 I/O status LEDs • The status LEDs for individual I/O points (green or three colors the plug-in I/O module. They show the status of the input or output. • The LEDs are labeled with the I/O point number.
2.3 Local override The local override and LCD facilities are available only on certain modules. In principle, plug-in I/O modules with and without a local LCD panel/operator controls are compatible and interchangeable. Only outputs can be overwritten. Any attempt to overwrite an input results in an error indication. Local override also operates without a bus master, provided that the DC 24 V module supply is present and the address key is plugged in.
2.3.2 Override status LED The yellow "Override" LED indicates that local override is active: Description Normal (Automatic operation) Local override active Multi-stage function Reminders / Errors 2.3.3 LED (yellow) OFF ON • The function can be overridden on any I/O point associated to the function • LEDs of all the associated I/O points flash when operated For details about errors please refer to the section "Indication, operation, and diagnostics" in the TX-I/O™ Engineering and installation guide [6].
Fault messages Quality value Normal Invalid No Output (DC 24 V) No Output (AC 24 V) Unreliable Other BO Bistable Unreliable Other AI Measure Multistate Fault Over Range Under Range Shorted Loop Open Loop No Sensor Quality Value = part of process value Open Loop No Sensor x x Shorted Loop x x Under Range x Multistate Fault x x x x Unreliable Other x x No Output (AC 24 V) x x x x x x x x x x x x x x x x No Output (DC 24 V) x x x x x x x x x x x x x x x x Over Range BI NO / NC BI Pulse NO
3 I/O functions Digital input functions The following functions for digital inputs are available in the TX-IO™ range: Description Status indication, maintained contact N/O or N/C Status indication, maintained contact N/C (P-Bus-BIM only) Status indication, pulse contact N/O Pushbutton input single / dual Counting, pulse contact N/O Multistate input 3.
• The signal is read at regular intervals and debounced on hardware level • An additional debounce time is available: 0…25.5 s (default = 0 s) • Pulses of more than 20 ms from pushbuttons are registered and kept ready for polling • Desigo XWORKS plus: Only D20 (N/O) is available. Inversion (D20R, N/C) must be realized via inverting in the parameterization. • P-Bus BIM : The configuration (D20. D20R) sets the contact type (N/O or N/C) • The meaning of the I/O status LED can be parameterized (TXM1.
3.2 Status indication, pulse contact (BI Pulse NO / D20S) (Function for P-bus BIM: See section 3.3) Application Used for the acquisition of status pulses from volt-free pulse contacts and electronic pulse transmitters such as transistors and optocouplers. The pulses can be triggered by: – Mains voltage monitoring systems – Emergency pushbutton signals, e.g.
closed N/O contact open N/C contact closed open Acknowledgement active Process value inactive ON I/O status LED OFF LCD display 10761D05 Diagram: Cause and effect For details, especially in relation to flashing pattern and errors: refer to the section "Display, operation and diagnostics" the TX-I/O™ Engineering and installation guide [6]. Response in the event of a fault In the event of an interruption in communication with the bus master, it makes no sense to store old pulses.
I/O status LED P-Bus BIM 10561Z204 I/O Module LCD Process value N/O Contact Signal Processing (D20S) Process value Island Bus P-Bus Memory P-Bus Acknowledge Block diagram of function • • • • The signal is read and debounced (pulses longer than 20 ms) The pulse is then saved in the P-bus BIM and transmitted to the automation station The automation station acknowledges receipt (Acknowledge) The memory is cleared, and the input is ready for a new pulse Additional incoming pulses before the Acknowled
3.4 Application Pushbutton input (BI Push NO, BI Push NC) Acquire potential-free button pulses (simple button/dual button). The process values (event telegrams) are evaluated in the bus master and help to control: – Blinds – Lighting applications – Other applications controlled by pulses • The function uses one or two I/O points (simple/dual button). In case of a dual button, both I/O points must be located next to each other on the same module pattern. • Only modules from series D support this function.
Process value The following events (telegrams) are used: Event Tg 1 Tg 2 Tg 3 Tg 4 Tg 5 Tg 6 Tg 7 Tg 8 Tg 9 Tg 10 Tg 11 Tg 12 Tg 13 Parameterization Description Report on current status (for COV repetition) Rising slope (start of short or long pulse) Click completed Start of a long pulse Repeat, long pulse active Long pulse completed Start short double-click Short double-click completed Start short/long double-click Start long double-click (two clicks with one long pulse at start) Long double-click compl
Examples Events identified • Rising slope • Short pulse • Long pulse • Very long pulse (Tg 5 activated) • Falling slope • • • • • Rising slope Short pulse Short double-click Short/long double-click Falling slope • • • • Rising slope Long pulse Long double-click Falling slope Zeitlicher Ablauf mit gesendeten Events Tg 2 Tg 3 Tg 4 Tg 5 Tg 2 Tg 3 Tg 7 td Tg 4 Tg 5 Tg 9 Tg 6 td tr tr tp ShortDoubleClick enabled tr tp tp Tg 7 Tg 8 Tg 2 Tg 2 Tg 6 td tp tp tp tr Tg 5 td td Tg 2 •
3.5 Multistate input maintained contact (MI Switch) Application • Mapping of several digital inputs to a single multistate value. • 3 different mapping kinds are available: – 1 to n mapping – Up-down mapping – Binary mapping Signal types This feature covers the following signal type. Signal type MI Switch Description Maintained contact, multistate, NO contact. Hardware • This function uses one I/O point for each stage. • The I/O points must be on the same module and adjacent to each other. • 2...
Up-down mapping • 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, but only in a fixed coding. • Examples: Enabling additional electrical heating or burner stages • If no input combination corresponding to the process value is found in the mapping table, a Reliability Error message is transmitted (Quality = MULTISTATE_FAULT) and the last valid process value stays active.
3.6 Application Counting, pulse contact (CI Mech (10/25 Hz), CI El (100Hz) / C) Acquisition of counter pulses from – Heat meters – Flow meters – Electricity meters In conjunction with energy metering, the counter function can also be used for the acquisition of synchronization pulses, which may – trigger the start of a new measuring period, or – initiate a switching event (change of tariff, load-shedding). The function requires one I/O point.
Local override 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.
Application 4 Analog input functions 4.1 Measurement The following analog variables can be processed: – – – – Temperature, via resistance sensors Resistance Voltage Current Configurable signal types Signal type Range Under / over range Resolution I/O status LED LCD 100 mΩ 20 mΩ 100 mΩ 10 mΩ OFF OFF variable variable Sensor type (No LCD) variable (No LCD) x x No LCD 2), 8) x x No LCD 2) 6) Resistance & AI Pt1000 temperature AI Pt100 AI 2500 Ohm P1K P100 R2K5 R250 0...2500 Ω 0...
The functions require one I/O point. Function LCD I/O status LED Field device 10561Z106 Hardware Process value Signal Processing BUS Compensation Block diagram of function STOP Note! • The function measures the input signal at regular intervals • The process value is calculated according to the signal • The admissible range for the input values is monitored so that any signal out of range / sensor short circuit / sensor open circuit is identified.
I/O functions 5 Digital output functions 5.1 General information on the digital outputs The following functions for digital outputs are available in the TX-IO™ range: Signal type (TRA) BO Relay NO 250V BO Relay NC 250V (Section 5.2) Signal type Q250 Description 1) Maintained contact, relay, changeover (also control of Step switches, pulse switches, bistable relays) BO Triac NO BO Triac NC (Section5.
• When detected, a new process value is carried out by the relay according to the I/O function. • The meaning of the I/O status LED can be parameterized: Normal = green (default) / Alarm = Red / Service = Yellow. • The way in which local override operates depends on the I/O function concerned (one or multi-stage, maintained contact or pulse). Local override • Local override has first priority, followed by the various "functional tests" and (lastly) operation via process value.
Overview: behavior in case of a fault Signal type TRA Signal type BO Relay NO 250V Q250 BO Relay NC 250V BO Triac NO 250V BO Triac NC 250V -- BO Relay NO 250V Q250 (Schrittschalter, Stromstossrelais, bistabiles Relais) Response in the following cases – No address key – Powerdown – Masterdown, integration via P-bus BIM The relays are de-energized *) Response in the following case – Masterdown, direct island bus integration Behavior when fault has been cleared The behavior can be parameterized: the r
5.2 Maintained contact, switchover (BO Relay NO / NC 250V / Q250) Application On/off switching of a wide range of devices and loads, e.g.
Display • The I/O status LED is ON when the relay is active, i.e. when the N/O contact is 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.
5.3 Maintained contact, triac (BO Triac NO / NC) Application On/off switching of AC 24 V devices, especially: – Frequent switching (triacs do not have any problems with contact life span) However, check the admissible switching frequency of the connected device and adjust the parameters or the application accordingly. – Other devices with AC 24 control – silent switching Hardware • • • • The function is supported by module type TXM1.8T only. The function requires one I/O point.
5.4 Maintained contact, bistable (BO Bistable NO / NC) Application On/off switching of devices and loads. Interruption of the power supply or the bus communications: the last state of the relays is maintained (bistable relays). In addition, the module supports setting of a backup state as well as a time delay before this backup state becomes effective. – Light control – Control of subsystems with uninterruptible operation Hardware • • • • The function is supported by module type TXM1.
Of course this only works if AC 24 V on the bus (conductor " V ") comes from the very same transformer that supplies the source of the DC 24 V supply. STOP When backup value " Keep" is parameterized, the module is supposed to take no activity at all, neither with absence nor with presence of bus or AC 24 V. Therefore, it doesn't matter if bus terminal "V " (field device supply) is open or powered if there is a bus connection module. Modules of Series C actually work without AC 24 V connected.
5.
Local override Display An additional ON or OFF pulse can be generated (e.g. by means of the local override). • Pressing one of the override buttons (n) or (n+1) in the middle enables/disables local override • When local override is active: Pressing "+" for one of the I/O points generates an ON 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.
5.6 Application Pulse (BO Pulse) For control and switching single stage electrical loads by means of pulses. Notes • Connection diagrams: see module data sheets. • Step switches, pulse switches, bistable relays: see Q250, section 5.2. Hardware • The function uses one I/O point. • The TX-I/O relay modules have changeover contacts Function • The process value must be written in "Triger mode". As a result, a pulse will be created on each change of the process value from 0 to 1 or 1 to 0.
5.7 Multistate maintained contact (MO Steps / Q-Mx) Application • For control and switching of multispeed motors and other electrical loads or their power contactors • Can be used to switch one or more control outputs. Examples: – Fans – Pumps – Chillers – Heat pumps – Electric heating coils – Burners Signal types This feature covers the following signal type.
Up-down mapping • The multistate process value is mapped so that the mapping table specifies one or more outputs to be driven. • It is possible to have several active outputs, but only in a fixed combination.
Local override Pressing the middle of one of the manual switches assigned to the function enables/disables local override. When local override is active: • Pressing "+" on one of the I/O points switches the load up one stage. Repeated or sustained pressure can be used to switch through several stages until the function reaches the highest stage. • Pressing "–" on one of the I/O points switches the load down one stage.
5.8 Multistate pulse (MO Pulse / Q250-Px) • For pulse control and pulse switching of multistate loads or the associated power contactors with self-latching for each load step. • Only one control output at a time is active.
• The multistate process value is mapped so that the mapping table defines just one output to be driven by a pulse. 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 another.
5.9 Application Three-position control signal (BO 3-Pos Relay, BO-3-Pos Triac / Y250T)) For open/close control of three-position actuators without feedback (position potentiometer), e.g. for – Valve actuators – Damper actuators – Third-party actuators Hardware The function uses two I/O points which must be on the same module and adjacent to each other. I/O point (n) = Open, I/O point (n + 1) = Close. Function • The function converts the process value into 3-position positioning signals.
Deadband / Hysteresis (Nz, Hys) • If the difference between the stroke model and the process value (∆Y) is more than half the deadband plus the hysteresis, this generates an OPEN or CLOSE pulse which is long enough to return the actuator to a position within the deadband. • The minimum pulse length is equal to the runtime multiplied by the hysteresis. + Y Hys Nz 0 t Hys _ 10761D99 Start synchronization (series D and higher) Start synchronization, if selected, is automatically initiated after reset.
In the case of bus failure, with DC 24 V module supply available, the following backup states van be parameterized: – No (0%) (= default) – Value (Backup value) – Keep Same value as before the bus failure Parameterization can be done during runtime. Fault message (series D and higher) The quality value "No_Output" will be sent in the following cases: • TXM1.8T: AC 24 V missing. The triac is not able to switch The module switches the output off and stops the stroke model.
5.10 Application PWM Pulse width modulation (BO PWM, with triac) Open/close modulating actuators e.g. for – Thermal valve actuators – Continuously controlled consumers (e.g. electric heating controlled via current valve) Remember to check the permissible switching frequency of the connected devices and adapt output parameterization. Hardware • • • • • Function The function converts the analog process value AOValue to a periodic switching pulse of the triac.
Case B: TimePeriod = 0 MinOnTime and MinOffTime are used to dynamically define the pulse length (also known as PDM, pulse duration modulation): • Period = MinOnTime / AOValue if AOValue <= MinOnTime / (MinOnTime + MinOffTime) • Period = MinOffTime / (1- AOValue) if AOValue > MinOnTime / (MinOnTime + MinOffTime) Process value <= MinOnTime/(MinOnTime+MinOffTime) Process value > MinOnTime/(MinOnTime+MinOffTime) Period Period MinOffTime MinOnTime t t Examples for cases A and B Input AOValue 85% 1) 80%
5.11 Application Blinds control (BO Blinds Relay) Control any kind of blinds. – Without louvers – With louvers Hardware The function uses – 2 I/O points for actuators with 2 end switches – 3 I/O points for actuators with 3 end switches the fourth I/O point must remain unused Function The function generates switching pulses for the 2 or 3 relays from the structured process value AOBValue. The blinds control function is shared between module and bus master (application function).
Process value Static commands Command UP DOWN2 DOWN1 STOP Relative commands RUN_UP RUN_DOWN Description UP The commands can have an additional pulse at the end (same direction) DOWN rd DOWN to middle position (3 end switch) Stop These commands contain one direction only (UP, DOWN) and one pulse length. They are used specifically to change the louver angle using short pulses in blinds with louvers. Relative commands can also be parameterized for long pulses.
Parameter Description Direction Exchange of outputs (only n and n+1) to correct faulty wiring. I/O point Direction = False Direction = True (normal) (inverted) n DOWN2 UP n+1 UP DOWN2 n+2 DOWN1 DOWN1 Detect end positions Note Range (default) Increment = 0.01 s BOOL (False) True / false • If EndPosDetection = inactive, the runtimes RunTimeUpDown and RunTimeDownUp must be parameterized. • If EndPosDetection = active, the motor current at the relay feeds is measured.
6 Analog output functions 6.1 Proportional control signal For operation of devices with an analog input (0 ... 10 V, 4 ... 20 mA), e.g.: – Damper actuators – Valve actuators – Proportional three-position converters – Devices for analog display and acquisition Application For connection to other systems, e.g. to transfer: – Setpoints – Sensor values – Reference variables Hardware The function uses one I/O point.
• When detected, a new process value is processed. • The output is a control voltage in the range DC 0… 10 V or a control current in the range DC 4 ... 20 mA • The process value is indicated via the I/O status LED, and on the LCD panel, if available • The output value can be overridden manually Local override • Local override has first priority, followed by tool override and (lastly) operation via process value • Tool override of an I/O point is indicated by the flashing of the module status LED.
Application 7 Default functions, disabling function 7.1 Default functions The default functions are downloaded into the modules before they leave the factory. They permit reduced operation and convenient "functional testing" in the control panel before the module parameters have been set.
Testing options with default functions Test Action Testing of inputs TXM1.8D, 16D (BI Default) Shorting the input I/O status LED LCD display Remark ON TXM1.8U (-ML), TXM1.8X (-ML) (UIO Default) Testing of digital outputs No voltage (input open or shorted) OFF –75 ... +75 µA at input OFF High-resistance conductivity tester Do not use! >75 µA at input ON < –75 µA at input Flashing 1 Hz >11.
8 Table of the parameters that can be set (example: Desigo / CFC) The white fields can be edited or filled via dropdown menu. Note For settings in other building automation and control systems see the respective online help. 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.
