CDK ELECTRONICS DC68K User Manual

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CDK ELECTRONICS LTD

DC68K Pack Control

USER MANUAL

V1.1a

This document is supplied in confidence for use only in the design, production, maintenance and operation of

CDK Electronics' Ltd equipment and must not be used for any other purpose. It may not be copied or its

contents divulged without written consent from CDK Electronics Ltd. The information contained within this

document is believed to be correct on the date of issue. CDK Electronics Ltd reserves the right to change

features and/or specifications without prior notice. No responsibility can be accepted by CDK Electronics Ltd

for the misuse of the information contained in this document.

Table of Contents

Summary of Contents for CDK ELECTRONICS DC68K

Page 1 This document is supplied in confidence for use only in the design, production, maintenance and operation of CDK Electronics’ Ltd equipment and must not be used for any other purpose. It may not be copied or its contents divulged without written consent from CDK Electronics Ltd. The information contained within this document is believed to be correct on the date of issue.
Page 2 This page is intentionally blank. Page CDK Electronics Ltd, 17/19, Buxton Road, Congleton, Cheshire. CW12 2DW. Tel 01260 296300. Fax 01260 296301. www.cdk.co.uk...
Page 3: Table Of Contents
FINE TUNING THE SYSTEM........................17 SYSTEM STATUS ............................18 SPECIFICATIONS............................19 Technical..............................19 LIST OF FIGURES............................20 USER MANUAL ISSUE UPDATES......................21 Page CDK Electronics Ltd, 17/19, Buxton Road, Congleton, Cheshire. CW12 2DW. Tel 01260 296300. Fax 01260 296301. www.cdk.co.uk...
Page 4: Introduction
INTRODUCTION The DC68K Pack Controller (referred to as the DC68K in this manual) provides control for both suction and discharge of up to four packs (i.e. two LT and two HT packs) An LCD display and keypad enable settings to be programmed and current status to be viewed.
Page 5: Normal Running
The DC68K system controls the suction and discharge pressures by comparing the control pressure from each PACK-IO with the programmed setpoint and deadband. Calculations are then made based upon the pressure difference, control and differential gain, stages available and stages required, the remote outputs are then switched appropriately.
Page 6: System Backup & Failure Modes
SYSTEM BACKUP & FAILURE MODES. If the DC68K is connected to a Storescan III system, a copy of the configuration is held within the Storescan, this enables the control settings to be adjusted from the Storescan, and the settings to be backed up. However it is important to note that the Storescan must be put into program mode before any adjustments are made within the DC68K.
Page 7: Installation
WORK ON LIVE CIRCUITS MUST ONLY BE CARRIED OUT BY TRAINED COMPETENT ENGINEERS. Wiring. The DC68K Pack Controller is intended for use in stores using PACK-IO boards and the Storescan III system with serial RS485 communication links to control suction and discharge loads.
Page 8: Communications Network Connections
Communications Network Connections. There are two RS485 communication networks connected to a DC68K, an internal network connected to the PACK-IO controllers and an external network to the Storescan III. Note: These two networks are incompatible and must not be connected to each other.
Page 9: Communications Address
Communications Address. The network address in the DC68K is set using the two rotary switches, these being set in hex i.e. C8 on the rotary switches corresponding to address 200 (top switch set to ‘8’ and the bottom switch set to ‘C). This is the address that Storescan will use to establish communications.
Page 10: Configuring The System
4. Note: Any addresses entered here must be the same as the addresses that the PACK-IO controllers are set to use. Page CDK Electronics Ltd, 17/19, Buxton Road, Congleton, Cheshire. CW12 2DW. Tel 01260 296300. Fax 01260 296301. www.cdk.co.uk...
Page 11 CDK engineers. The pack settings screens D e v i c e L i s t will overwrite any changes that are made from this screen. Page CDK Electronics Ltd, 17/19, Buxton Road, Congleton, Cheshire. CW12 2DW. Tel 01260 296300. Fax 01260 296301. www.cdk.co.uk...
Page 12: Adjusting The Control Settings
When making changes the system counts are modified and the pressure displayed will change accordingly. Page CDK Electronics Ltd, 17/19, Buxton Road, Congleton, Cheshire. CW12 2DW. Tel 01260 296300. Fax 01260 296301. www.cdk.co.uk...
Page 13: Control Settings
1 second delay for HP controllers. The setting is adjustable across the whole pressure range. Page CDK Electronics Ltd, 17/19, Buxton Road, Congleton, Cheshire. CW12 2DW. Tel 01260 296300. Fax 01260 296301. www.cdk.co.uk...
Page 14 The minimum off time specifies the minimum time that a compressor will remain stopped for once it has been switched off. The range is from 1 to 255 minutes. Page CDK Electronics Ltd, 17/19, Buxton Road, Congleton, Cheshire. CW12 2DW. Tel 01260 296300. Fax 01260 296301. www.cdk.co.uk...
Page 15 10. Page CDK Electronics Ltd, 17/19, Buxton Road, Congleton, Cheshire. CW12 2DW. Tel 01260 296300. Fax 01260 296301. www.cdk.co.uk...
Page 16: Default Control Settings
Run Verify Timer Time From Start to Receipt of Signal Smoothing Enables damping and Diff Gain Damping System Setting. Do Not Adjust Page CDK Electronics Ltd, 17/19, Buxton Road, Congleton, Cheshire. CW12 2DW. Tel 01260 296300. Fax 01260 296301. www.cdk.co.uk...
Page 17: Fine Tuning The System
• Set the ‘Dead Band’ to 1/2 of the control band. • The DC68K should then be left to control the pack for about 10 to 15 minutes so that the system can stabilize with the new settings. Large pressure swings should be ignored at this point, just the general reaction to normal pressure changes.
Page 18: System Status
Use the up and down arrow keys to scroll through all 4 packs. Actual Pressure S = Suction D = Discharge Page CDK Electronics Ltd, 17/19, Buxton Road, Congleton, Cheshire. CW12 2DW. Tel 01260 296300. Fax 01260 296301. www.cdk.co.uk...
Page 19: Specifications
Software / hardware (mechanical or electrical/electronic) system failures have no disconnection functionality; it must therefore be assumed that all working voltages are permanently present. Page CDK Electronics Ltd, 17/19, Buxton Road, Congleton, Cheshire. CW12 2DW. Tel 01260 296300. Fax 01260 296301. www.cdk.co.uk...
Page 20: List Of Figures
LIST OF FIGURES Figure 1 General Wiring Details Page CDK Electronics Ltd, 17/19, Buxton Road, Congleton, Cheshire. CW12 2DW. Tel 01260 296300. Fax 01260 296301. www.cdk.co.uk...
Page 21: User Manual Issue Updates
USER MANUAL ISSUE UPDATES. Version 1.0 June 2000 First Issue Version 1.1a 17 Sept 2001 Preliminary Update for Intelligent Control Page CDK Electronics Ltd, 17/19, Buxton Road, Congleton, Cheshire. CW12 2DW. Tel 01260 296300. Fax 01260 296301. www.cdk.co.uk...