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UD78 User Guide

Issue code: 78nu2

Operation

For automatic operation of the back-up

supply, this supply should be

connected continuously.

The following table shows the results of a combination of supply conditions.
A 400V

supply is considered to be removed when it is below

approximately 230V

RMS

supply Back-up

supply

Resulting effect

Present Present or

absent

Control circuits and power stages operate
(Drive fully operational, including the precision analog input)

Absent Present If the

supply is present, then removed, parameters that are saved

at power-down are saved
Only the control circuits operate
The Drive cannot power a motor
The Drive displays

LOPS

The Drive can be programmed either manually or via
serial communications, but parameter values cannot be saved
Model sizes 1 and 2: Heatsink fan operates
Model sizes 3 and 4: Heatsink fans do not operate

Power-up delays

The following delays occur:

supply disconnected

Back-up

supply

being

connected

5 second delay for Drive display and serial
communications to become active

Back-up

supply

already

connected

supply

being

connected

5 second delay before the Drive can be
enabled

Note

Stator resistance test (open-loop only)

If parameter

5.14

(

0.07

) is set at

Ur_I

for the Drive to perform a stator

resistance test at power-up, and the

supply is disconnected, the Drive

will trip if the Back-up

supply is connected. The Drive will display trip

code

, indicating failure to perform the stator resistance test.

To prevent this occurring, set parameter

5.14

(

0.07

) at one of the

following, and refer to

Voltage boost

in Chapter 4

Menu 0 parameters

in the

Unidrive User Guide

Ur_S

Содержание UD78

Страница 1: ...User Guide UD78 UD78 Servo large option module for Unidrive Part Number 0460 0086 Issue Number 2...

Страница 2: ...anical including photocopying recording or by any information storage or retrieval system without permission in writing from the publisher Use within the European Union etc The following information a...

Страница 3: ...0 4 3 SK2 Back up DC supply input connector 11 Functions of the terminals 11 Specification 11 Operation 12 4 4 PL1 Serial communications connector 13 Functions of the terminals 13 Specification 13 Ser...

Страница 4: ...ts A 1 A 1 Fundamentals of data transmission A 1 A 2 Reading a parameter value A 4 A 3 Re reading a parameter value A 5 A 4 Writing a parameter value A 5 A 5 Re writing a parameter value A 6 A 6 Calcu...

Страница 5: ...module is an interface module for installation in a Unidrive and has the following functions Precision analog input EIA RS485 4 wire or 2 wire serial communications interface fully opto isolated Back...

Страница 6: ...Serial comms interface The serial communications interface allows the following The Drive to be controlled and monitored remotely by a system controller The Drive to control or monitor another Drive...

Страница 7: ...rive has been energized the AC supply must be isolated at least ten minutes before work may continue 2 3 System design The Drive is intended as a component for professional incorporation into complete...

Страница 8: ...output of the Drive or from any external option unit The Stop and Start controls or electrical inputs of the Drive should not be relied upon to ensure safety of personnel If a safety hazard could exis...

Страница 9: ...y as specified in IEC664 1 The installer must ensure that the external control circuits are insulated from human contact by at least one layer of insulation rated for use at the AC supply voltage If t...

Страница 10: ...erminal cover from the Drive for removal instructions see Installing the Drive and RFI filter in Chapter 2 of the Unidrive Installation Guide 4 Push the UD78 into the cavity immediately behind the key...

Страница 11: ...er the AC supply or a DC back up supply is applied to the Drive If the UD78 is removed when the Drive is powered up the Drive will trip the display will indicate ANI diS If the UD78 is deliberately re...

Страница 12: ...ontrol circuits are insulated from human contact by at least one layer of insulation rated for use at the AC supply voltage If the control circuits are to be connected to other circuits classified as...

Страница 13: ...VD 0VD SK1 UD78 System controller 0VD NC 0VD Vout Vout Figure 4 Connections to the precision analog input Functions of the terminals Terminal Name Function 1 0VD 0V 2 Vin Reference input 3 Vin Referen...

Страница 14: ...put 150 V Zero crossing error 150 V Linearity error 0 1 of full scale Input filter time constant 10 s Resolution Open loop 12 bit plus sign Closed loop pulses are accumulated Sample period See below O...

Страница 15: ...upply voltage including ripple 22 8V 26 4V Maximum ripple at 100Hz 1V RMS Absolute maximum voltage 50V Absolute maximum reverse voltage 30V Continuous current when the AC supply is disconnected from t...

Страница 16: ...communications but parameter values cannot be saved Model sizes 1 and 2 Heatsink fan operates Model sizes 3 and 4 Heatsink fans do not operate Power up delays The following delays occur AC supply dis...

Страница 17: ...ads EIA RS485 2 wire Transceiver mode 4 unit loads EIA RS485 Termination resistance 120 5 no series capacitor In accordance with the EIA RS485 specification the total load on a line must not exceed 32...

Страница 18: ...r operation in the following modes 2 wire ANSI Half duplex communications transceiver mode 4 wire ANSI Half duplex communications independent RX and TX channels Output The Drive is to control another...

Страница 19: ...ire serial communications connections Ensure parameter 11 24 Serial comms mode selector is set at ANSI 4 1 default setting Two wire ANSI 0VSC PL1 UD78 TX RX TX RX System controller 0VSC RXTERM TXTERM...

Страница 20: ...arameter 11 24 Serial comms mode selector as follows Output mode OutPUt 2 Input mode InPUt 3 Output mode The value of a variable parameter selected by parameter 11 27 Serial comms source selector is s...

Страница 21: ...d of the link If this unit is a UD78 the RX line can be terminated by linking terminals 5 and 9 the TX line by linking terminals 4 and 8 Note When 2 wire mode transceiver is used link terminals 5 and...

Страница 22: ...ve User Guide Key Type of parameter RO Read only RW Read write selector Select from a number of settings enable Make or allow a function to operate indicator The value can only be read Limitations of...

Страница 23: ...scaling Any unprotected variable parameter 7 10 Function 1 destination selector V f x 1 2 3 Precision analog input 7 09 Analog input 1 invert 7 01 Analog input 1 The parameters are shown at their def...

Страница 24: ...1 Analog input 1 indicator to indicate zero 7 08 Analog input 1 scaling 0 4 000 1 RW Uni Set 7 08 at the required value to alter the scaling of the analog reference The scaling takes place after full...

Страница 25: ...value is less than 1 5V the new full scale value will be the default value 9 8V 2 Set 7 25 at 1 The input scaling automatically changes according to the applied value see step 1 This new value will se...

Страница 26: ...or via serial communications but parameter values cannot be saved Model sizes 1 and 2 Heatsink fan operates Model sizes 3 and 4 Heatsink fans do not operate 5 4 Serial communications parameters 11 23...

Страница 27: ...her Drive 11 27 Serial comms destination selector See PL1 Serial communications connector in Chapter 4 Making Connections 11 25 Serial comms baud rate 4800 0 9600 1 19200 2 4800 baud RW Txt P Applicab...

Страница 28: ...le parameter can be specified If any other type of parameter is specified no value is transmitted Input mode Only a variable parameter that is not protected can be specified If any other type of param...

Страница 29: ...aracter 2nd hex character Start bit 7 data bits Parity bit Stop bit 0 LSB MSB 1 This is known as a 10 bit frame since there are 10 bits transmitted in total The format is described as follows 1 start...

Страница 30: ...e on an ANSI communications bus must be given a unique identity or address so that only the target Drive will respond to a command transmitted by the system controller The address comprises the follow...

Страница 31: ...d by four digits representing the menu and the parameter number but without the decimal point Example To send a message to menu 4 parameter 26 write 0426 the leading zero must be included To send a me...

Страница 32: ...ure if the message is understood Control Parameter Data Control BCC STX M1 M2 P1 P2 D1 Dn ETX BCC Where M1 M2 Menu number P1 P2 Parameter number D1 Dn Data First character or Space for positive values...

Страница 33: ...riod of time A 4 Writing a parameter value To write a value to a parameter the message structure is comprised as follows Control Address Control Parameter Data Control BCC EOT GA GA UA UA STX M1 M2 P1...

Страница 34: ...When a different Drive is addressed or an invalid character is received the re write facility no longer functions The first Drive can be addressed again only by using the full write message with the a...

Страница 35: ...e used as control codes When the final XOR result produces a decimal value less than 32 32 is added In this example 0011 0100 is 52 decimal which is above 31 so this is the final BCC value 52 decimal...

Страница 36: ...UD78 User Guide Issue code 78nu2 A 8...

Страница 37: ...yed defining the parameters function type and min max permitted value Unisoft is available from your local Drive Centre PCs have an RS232 serial communications interface To enable the PC to communicat...

Страница 38: ...UD78 User Guide Issue code 78nu2 B 2...

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