Overview of DeviceNet Stack Light

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4-6 Operations Error Mode Errors are critical and non-critical. Table 4.K Error Type Critical (non-recoverable) Non-Critical (recoverable) Description • Failure of diagnostic tests during power-up/reset mode • Duplicate node address detected • Incorrect data rate • Pilot lamp burned out/module missing (power must be cycled to reset Status Byte once lamp is changed) • I/O connection timeout Refer to the troubleshooting chart in Chapter 5 for details on how to recover from an error. Resetting the Device To reset the 855T Control Tower Stack Light, you must cycle power to the unit or disconnect the DeviceNet Cabling. DeviceNet Operations The Allen-Bradley 1747-SDN, 1771-SDN, and 1756-DNB DeviceNet Scanner Modules are master devices on the DeviceNet Network. The 855T Control Tower Stack Light supports the Master/Slave Connection Set for master/slave communications on the DeviceNet Network. To communicate with 855T Control Tower Stack Light, the DeviceNet Scanner Module must be configured with the stack light: • Node Address • Input bytes (1) • Output bytes (1) The DeviceNet Scanner Module: • connects to the 855T Control Tower Stack Light slave device. • performs appropriate connection configuration. • polls the 855T Control Tower Stack Light for I/O. Publication 855T-UM001B-EN-P September 2000
Chapter 5 Troubleshooting and Maintenance Chapter Objectives This chapter contains the following sections: Table 5.A Section Page Section Page Preventive Maintenance 5-1 Troubleshooting 5-2 LED Indicators 5-2 Bulb Burnout 5-3 Preventive Maintenance • Prevent accumulation of dust and dirt by: – keeping the base clean. – keeping modules installed on base with o-rings. • Periodically check for loose connections. ATTENTION To avoid shock hazard, remove incoming power before checking connections. ! Publication 855T-UM001B-EN-P September 2000
Page 1 and 2: Stack Light Bulletin 855T User Manu
Page 3 and 4: Throughout this manual we use notes
Page 5 and 6: Table of Contents Preface Intended
Page 7 and 8: Preface This manual gives an overvi
Page 9 and 10: Chapter 1 Overview of DeviceNet Sta
Page 11 and 12: Overview of DeviceNet Stack Light 1
Page 13 and 14: Overview of DeviceNet Stack Light 1
Page 15 and 16: Quick Start 2-2 Node Address Config
Page 17 and 18: Quick Start 2-4 Figure 2.4 Select t
Page 19 and 20: Quick Start 2-6 Scanner Configurati
Page 21 and 22: Quick Start 2-8 Figure 2.8 Add Stac
Page 23 and 24: Quick Start 2-10 Figure 2.10 To vie
Page 25 and 26: Quick Start 2-12 Figure 2.12 For mo
Page 27 and 28: Installation and Mounting 3-2 The l
Page 29 and 30: Installation and Mounting 3-4 Devic
Page 31 and 32: Chapter 4 Operations Chapter Object
Page 33 and 34: Operations 4-3 IMPORTANT Although i
Page 35: Operations 4-5 Control/Status Commu
Page 39 and 40: Troubleshooting and Maintenance 5-3
Page 41 and 42: Specifications A-2 Table A.1 Enviro
Page 43 and 44: DeviceNet Information B-2 Object Cl
Page 45 and 46: DeviceNet Information B-4 Class Cod
Page 47 and 48: DeviceNet Information B-6 Common Se
Page 49 and 50: DeviceNet Information B-8 Instance
Page 51 and 52: DeviceNet Information B-10 Class Co
Page 53 and 54: DeviceNet Information B-12 Instance
Page 55 and 56: DeviceNet Information B-14 Class At
Page 57 and 58: DeviceNet Information B-16 Common S
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Overview of DeviceNet Stack Light

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