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control – motion –
With Analogue Output and Serial Interface
• Counter suitable for quadrature signals (A/B, 90º) as well as single channel inputs
• Counting inputs selectable to TTL/ RS422 format or to HTL / 10-30 volts format
• Maximum counting frequency 500 kHz
• Analogue outputs +/-10 V, 0-20 mA and 4-20 mA, polarity following the sign of the
internal counter
• Analogue conversion time 1 msec only
• RS 232 and RS 485 interfaces for serial readout of the counter
• Also suitable for conversion of the sum or the difference of two separate counts
• Facility for free linearization of the analogue output by 16 interpolation points
• Easy to set up by TEACH procedure, or by PC and Windows software
ZU25102A_e.DOC / Mrz-08
interface
ZU 251
Incremental Counter Module
Operating Instructions
ELEKTRO-TRADING sp. z o.o
Tel.
+48 (0-32) 734-55-72
Tel/Fax +48 (0-32) 734-55-70
E-Mail et@elektro-trading.com.pl
http://www.elektro-trading.com.pl
Page 1 / 26
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Summary of Contents for Motrona ZU 251 Series
- Page 1 ELEKTRO-TRADING sp. z o.o Tel. +48 (0-32) 734-55-72 Tel/Fax +48 (0-32) 734-55-70 E-Mail et@elektro-trading.com.pl http://www.elektro-trading.com.pl control – motion – interface ZU 251 Incremental Counter Module With Analogue Output and Serial Interface • Counter suitable for quadrature signals (A/B, 90º) as well as single channel inputs •...
- Page 2 Safety Instructions • This manual is an essential part of the unit and contains important hints about function, correct handling and commissioning. Non-observance can result in damage to the unit or the machine or even in injury to persons using the equipment! •...
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Page 3: Table Of Contents
Table of Contents 1. Introduction....................4 2. Applicable encoders and sensors ..............5 3. Terminal Assignment ..................6 3.1. Incremental encoders TTL / RS 422 ..............6 3.2. Incremental encoder HTL / 12-30V ...............7 3.3. Proximity switches, photocells etc................7 3.4. Analogue outputs ....................7 3.5. -
Page 4: Introduction
1. Introduction ZU 251 represents a small and low-cost, but highly performing converter for industrial applications, where incremental counting of positions or events must be converted to either analogue format or serial data. The unit has been designed as a compact module with 12 screw terminals and a 9-position SUB-D connector (female). -
Page 5: Applicable Encoders And Sensors
2. Applicable encoders and sensors The converter can accept the following impulse sources: • Encoders with HTL level output (12–30V) and either PNP or NPN or Push-Pull or NAMUR characteristics, using quadrature output signals A and B • TTL / RS422 encoders providing the output lines A, /A ,B and /B •... -
Page 6: Terminal Assignment
3. Terminal Assignment We recommend connecting the Minus wire of the power supply to earth potential. Please observe that, under poor earthing and grounding conditions, multiple earth connections of screens and GND terminals may cause severe problems. In such cases it may be better to have only one central earthing point for the whole system. -
Page 7: Incremental Encoder Htl / 12-30V
3.2. Incremental encoder HTL / 12-30V The encoder may be supplied from the same source as the converter, or from another source. HTL encoder +24V ZU 251 converter Screen 12 (GND) 3.3. Proximity switches, photocells etc. This connection is fully similar to a HTL incremental encoder. With single-channel operation, input B remains unconnected or can be used to select the output polarity. -
Page 8: Serial Interfaces
3.5. Serial interfaces The unit provides a RS232 interface and a RS485 interface, however only one of the two can be used at a time. Serial communication allows to read out the counting result and to set parameters and variables by PC, according to need. GND int. -
Page 9: Dil Switch Settings
4. DIL switch settings The DIL switch located on the top site of the unit provides customer-specific settings of the desired operation modes. Changes of the switch settings will become active only after the next power-up cycle! ZU25102A_e.DOC / Mrz-08 Page 9 / 26... - Page 10 1 2 3 4 5 6 7 8 Unit loads default settings with every power up cycle No loading of default settings upon power-up HTL ( 12 - 30 V ) TTL / RS 422 Push button and LED operating in Teach mode Teach function disabled, LED testing inputs A and B NPN (switch to -) PNP (switch to +)
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Page 11: Setup Procedure
5. Setup Procedure For all basic applications you can use the Teach feature for commissioning of the unit. Extended functions need a PC for setup and are described under section 7. As a first step it is advisable to check the input pulses by means of the LED marked “Status”. DIL switch 6 must be set to ON for this test. -
Page 12: Operation As Single Channel Counter (Without Direction Signal) Or As Positional Counter (With Direction Signal)
5.1. Operation as single channel counter (without direction signal) or as positional counter (with direction signal) • Settings: Make sure that the DIL switch is set according to the encoder in use, and that DIL switch position 6 is OFF (Teach function active). •... -
Page 13: Readout Of The Actual Counter State By Serial Communication
ZU 251 uses the DRIVECOM communication protocol according to the ISO 1745 standard. Details about the protocol can be found in our document “SERPRO.doc”, available for download under www.motrona.com The following register codes are available for readout: C2 Description Actual conversion result, scaled as % of full scale output, format xxx.xxx % *) Actual counting result Actual output voltage of the analogue output, scaling 0 –... -
Page 14: Pc Setup With Use Of The Operator Software Os3.X
DIL switch setting. To do this, select „Comms“ from the menu bar. • Ex factory, all motrona units use the following serial standard settings: Unit No. 11, Baud rate 9600, 1 start/ 7 data/ parity even/ 1 stop bit •... -
Page 15: Displays And Softkeys
8. Displays and Softkeys The edit window for all unit parameters can be found on the left side of the screen. The INPUTS field shows the softkeys to switch the control commands on or off. Display boxes in the RS column indicate when the corresponding command is set to ON by PC. Display boxes in the PI/O column indicate that the corresponding command is ON by external hardware. -
Page 16: Parameter Settings
9. Parameter Settings Parameter Description Display Setting: These operands allow to convert the result to the desired engineering units. The conversion affects the numeric value for serial read out from register x Operand <:8> only, but not the scaling of the analogue output. / Operand +/- Operand With settings... - Page 17 Parameter Description Output Mode: Selects the output format of the analogue outputs as shown: Encoder Encoder Encoder Encoder Max. Min. Max. Min. Max. Min. Max. Min. Output Mode = 0 Output Mode = 1 Output Mode = 3 Output Mode = 2 -10V ...
- Page 18 Parameter Description Reset Value: With every reset command, the counter presets to the datum set here (e.g. 000 000) and the analogue output follows the new counter state according to its output scaling. Round Loop: This register limits the counting range to a repeating loop. With setting of 1000, in upwards direction 999 is followed by to 000, and in downwards direction the counter sets to 1000 when reaching zero.
- Page 19 Parameter Description RS232 / RS485 Setting: Especially with RS 485 applications it is necessary to attach a specific Unit Number: address to each unit, since up to 32 units can be connected to the same bus. You can choose any address number between 11 and 99. Factory setting = 11 The address must not contain a “0“...
- Page 20 The following register settings control the automatic cyclic transmission of internal register values by serial interface to peripherals like printers or displays. Parameter Description Serial Protocol: This register selects the serial protocol for the cyclic transmission. When set to 0, the string starts with the serial address of the unit (“Unit Number”), followed by a space and the value of the register to be read out.
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Page 21: Free Programmable Linearization
10. Free Programmable Linearization This programmable feature allows the user to convert the linear counting process to a non- linear analogue output. There are 16 programmable interpolation points available, which can be set in any desired distance over the full conversion range. Between two coordinates, the unit uses linear interpolation. - Page 22 You can visualize your curve on the PC screen or by means of an external oscilloscope. For this, select TOOLS, then TEST and there „Analogue Voltage Function“. The unit will now simulate a repeating counting cycle over the full range and generate the analogue signal accordingly.
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Page 23: Test Functions
11. Test Functions When you select TEST from the TOOLS menu, you are able to verify the following data, by clicking to the corresponding field: • Actual counter value • DIL switch settings • Internal supply voltages • Analogue output state ZU25102A_e.DOC / Mrz-08 Page 23 / 26... -
Page 24: Dimensions
12. Dimensions 91mm (3.583’’) 40 mm (1.575’’) 74 mm (2.913’’) Side view Top view Front view ZU25102A_e.DOC / Mrz-08 Page 24 / 26... -
Page 25: Technical Specifications
13. Technical Specifications Power Supply 18...30 VDC Power consumption approx. 170 mA at 18 V approx. 120 mA at 30 V (+5.5V uncharged) Encoder supply +5.5V +/- 5% (max. load: 150mA) Inputs RS422 and TTL TTL differential, RS 422 standard Inputs HTL and Reset High >... -
Page 26: Parameter List
14. Parameter List Parameter Min. value Max. value Default Digits Decimal Serial Code positions *Operand -99 999 99 999 10 000 +/- 5 /Operand 99 999 10 000 +/- Operand -100 000 000 100 000 000 +/- 9 Teach Minimum A -100 000 000 100 000 000 +/- 9...
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