Control Techniques UD78 User Manual
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Control Techniques UD78 User Manual

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

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Summary of Contents for Control Techniques UD78

  • Page 1 User Guide UD78 UD78 Servo large option module for Unidrive Part Number: 0460 - 0086 Issue Number: 2...
  • Page 2 Drive with the motor. This option module is intended for use only with Control Techniques Unidrive products. Any other use invalidates the warranty and may cause a safety hazard.

  • Page 3: Table Of Contents

    Contents Chapter Introduction Main features of the UD78 Safety Information Installing the UD78 Making Connections Locations of the connectors SK1 Precision analog input connector Functions of the terminals....................9 Specification........................10 SK2 Back-up DC supply input connector Functions of the terminals....................11 Specification.........................11...
  • Page 4 Serial Comms. ANSI Message Formats Fundamentals of data transmission Reading a parameter value Re-reading a parameter value Writing a parameter value Re-writing a parameter value Calculating the block checksum (BCC) Setting up the Drive using UniSoft UD78 User Guide Issue code: 78nu2...

  • Page 5: Introduction

    The UD78 can be used only with Drives equipped with version 3 (or later) software. (Parameter 0.50 indicates the software version.) Main The UD78 large option module is an interface module for installation in a functions Unidrive and has the following functions: • Precision analog input •...
  • Page 6 • The Drive to control or monitor another Drive Installation The UD78 must be fitted in the large option module bay of the Unidrive. Precision analog input and serial communications connections are made by 9-way D-type connectors. The external Back-up supply connections are made by a pluggable 5-way screw-terminal block.

  • Page 7: Safety Information

    To ensure mechanical safety, additional safety devices such as electro-mechanical interlocks may be required. The Drive must not be used in a safety-critical application without additional high-integrity protection against hazards arising from a malfunction. UD78 User Guide Issue code: 78nu2...
  • Page 8 Drive. Damage may occur, or lives put at risk. Carefully follow the instructions in this User Guide. Before making adjustments to the Drive, ensure all personnel in the area are warned. Make notes of all adjustments that are made. UD78 User Guide Issue code: 78nu2...
  • Page 9 Some parameters have a profound effect on the operation of the Drive. They must not be altered without careful consideration of the impact on the controlled system. Measures must be taken to prevent unwanted changes due to error or tampering. UD78 User Guide Issue code: 78nu2...

  • Page 10: Installing The Ud78

    Drive for at least 10 minutes. Check that the exterior of the UD78 is not damaged, and that the multi-way connector is free from dirt and debris. Do not install a damaged or dirty UD78 in the Drive.
  • Page 11 Do not remove the UD78 from the Drive when either the supply or a 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...

  • Page 12: Making Connections

    Safety Extra Low Voltage (SELV) (eg. to a personal computer), an additional isolating barrier must be included in order to maintain the SELV classification. Locations of the connectors Figure 3 Locations of the connectors on the UD78 UD78 User Guide Issue code: 78nu2...

  • Page 13: Sk1 Precision Analog Input Connector

    +Vout +Vin System controller SK1 [UD78] Figure 4 Connections to the precision analog input Functions of the terminals Terminal Name Function +Vin Reference input + –Vin Reference input – Not connected Not connected Shell UD78 User Guide Issue code: 78nu2...

  • Page 14: Specification

    4.08 Torque reference Open-loop 1.36 Analog reference 1 3, 6, 12 1.38ms 1.37 Analog reference 2 4, 5, 9 1.84ms 4.08 Torque reference All other parameters 3, 6, 12 5.5ms 4, 5, 9 7.4ms UD78 User Guide Issue code: 78nu2...

  • Page 15: Sk2 Back-Up Dc Supply Input Connector

    The Drive can be powered for (104°F) 15 minutes maximum Drive powered by the supply Up to 40°C The Drive can be powered (104°F) indefinitely Up to 50°C Refer to the Unidrive Installation (122°F) Guide UD78 User Guide Issue code: 78nu2...

  • Page 16: Operation

    , 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 UD78 User Guide Issue code: 78nu2...

  • Page 17: Pl1 Serial Communications Connector

    In accordance with the EIA RS485 specification, the total load on a line must not exceed 32 unit-loads. Each transmitter and receiver of the UD78 loads the line by two unit-loads (in two-wire mode, each UD78 loads the line by four unit-loads). This allows the following to be operated: •...

  • Page 18: Serial Communications Modes

    Make connections as shown in Figure 6, 7 or 8 as required. If the Drive is to be set up using Unisoft on a PC, see Appendix B Setting up the Drive using Unisoft. UD78 User Guide Issue code: 78nu2...
  • Page 19 Two-wire ANSI 0VSC TERM TERM TERM TERM TX\ RX\ TX RX 0VSC System controller PL1 [UD78] Figure 7 2-wire (transceiver mode) serial communications connections Set parameter 11.24 Serial comms. mode selector at (0). ANSI 2 UD78 User Guide Issue code: 78nu2...

  • Page 20: Ground Connection

    If communications fail, the Drive will trip; the display will indicate Ground connection In addition to each end of the cable shield being connected to 0V, it can be connected by a single path to a ‘clean’ ground. UD78 User Guide Issue code: 78nu2...

  • Page 21: Routing The Serial Communications Cable

    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.

  • Page 22: Related Parameters

    Introduction The parameters listed in this chapter are used for programming and monitoring the UD78 when it is fitted in a Drive. Refer to the Unidrive User Guide for programming instructions. Before attempting to adjust any parameters, refer to the Warnings and Notes at the beginning of Chapter 3 Setting up the Drive in the Unidrive User Guide.

  • Page 23: Precision Analog Input Parameters

    The parameters are shown at their default settings. The logic diagram is valid when all parameters are at their default settings but may not be valid when certain parameters are adjusted. Figure 9 Logic diagram for the precision analog input UD78 User Guide Issue code: 78nu2...
  • Page 24 The default setting of 7.10 assigns terminals 2 and 3 of SK1 to 1.36 Analog reference 1. If required, use 7.10 to change the function of the precision analog input by entering the required number (eg. menu.parameter 4.08 torque reference). UD78 User Guide Issue code: 78nu2...
  • Page 25 High values give smooth low-speed operation but a poorer dynamic response. 7.31 UD78 large option module fitted indicator ô ð 0 ~ 1 7.31 is set at 1 when a UD78 module is fitted in the Drive. UD78 User Guide Issue code: 78nu2...

  • Page 26: Back-Up Dc Supply Parameter

    (eg. addresses are not permissible). Each UD78 on a serial communications network must have a unique address. Up to nine groups can be created, and up to nine units can be assigned to a group. (See Appendix A Serial communications message formats.)
  • Page 27 When 11.24 is set at for 2-wire (transceiver) operation, it is possible ANSI 2 for the UD78 to reply to an interrogation from the system controller before the system controller returns from transmit to receive mode. If this occurs, data will be lost.
  • Page 28 To make the new setting take effect, press 11.28 Serial comms. parameter scaling ô ð 0 ~ 4.000 RW Uni Input and output modes If required, use 11.28 to scale the value being transmitted or received. UD78 User Guide Issue code: 78nu2...

  • Page 29: A.1 Fundamentals Of Data Transmission

    (hex. 00 to 1F) are used to represent special codes. These are the ASCII control codes, each of which has a particular meaning (eg. start of text is called and is code 02.) ASCII UD78 User Guide Issue code: 78nu2...
  • Page 30 00. This address can be used to send a Start command to a group of Drives which are mechanically coupled together to drive a conveyer line. All the Drives will then start simultaneously. UD78 User Guide Issue code: 78nu2...
  • Page 31 In order to protect the system against messages that have become corrupted in transmission, all write messages and data responses are terminated by the block checksum character ( ). See Calculating the block checksum ( ) later in this appendix. UD78 User Guide Issue code: 78nu2...

  • Page 32: A.2 Reading A Parameter Value

    ASCII Example To read the value of parameter 1.21 in a Drive that is unit 2 of group 1, send: Control Address Parameter Control The Drive replies as follows: Control Parameter Data Control – UD78 User Guide Issue code: 78nu2...

  • Page 33: A.3 Re-Reading A Parameter Value

    The Drive will respond with a single control character, as follows: Control code Meaning Acknowledge — Message has been understood and implemented. Message invalid Data is too long or out of range Parameter is invalid Parameter is read-only BCC is incorrect UD78 User Guide Issue code: 78nu2...

  • Page 34: A.5 Re-Writing A Parameter Value

    The next character is (00110001 in binary), which now has the exclusive ) operator act upon it. With the previous result value, a new result occurs of 00000001 in binary. UD78 User Guide Issue code: 78nu2...
  • Page 35 FOR n% = 7 to LEN(mess$)‘start at the character after ‘chr$(2). bcc% = bcc% XOR ASC(MID$(mess$, n%, 1)) NEXT IF bcc% < 32 THEN bcc% = bcc% + 32 mess$ = mess$ + CHR$(bcc%) PRINT mess$ UD78 User Guide Issue code: 78nu2...
  • Page 36 UD78 User Guide Issue code: 78nu2...
  • Page 37 0VSC –––– –––– –––– –––– Connect terminals 1, 6, 7 of the UD78 together. Recommended maximum cable length: 3m (10 ft) Note The special serial communications cable connected as shown above must be used only for temporary connection to the Drive. It must not be used for permanent installations.
  • Page 38 UD78 User Guide Issue code: 78nu2...

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