Manual

LDU 78.1 Technical Manual, Rev. 12 May 2011
Page 2 of 36
Table of Contents:
1. Safety Instructions .................................................................................................................................... 4
2. Declaration of Conformity ........................................................................................................................ 5
3. Introduction and Specifications ............................................................................................................... 6
4. Communications and Getting started ..................................................................................................... 7
4.1. Serial Interface ......................................................................................................................................... 7
4.2. Command Language ................................................................................................................................ 7
4.3. Baud Rate / Device Address .................................................................................................................... 8
4.4. Getting Started ......................................................................................................................................... 8
5. Hardware and Wiring ................................................................................................................................. 9
5.1. Wiring ....................................................................................................................................................... 9
5.2. With Unit Adapter UA 77.1 (RS232) ........................................................................................................ 9
5.3. With Unit Adapter UA 73.2 (RS422 / RS485 Full-/Half-Duplex) .............................................................. 9
5.4. Terminal Configuration ........................................................................................................................... 10
5.5. Load Cell Connection ............................................................................................................................. 10
6. Calibration and Calibration Sequence ................................................................................................... 11
7. Commands – Overview ........................................................................................................................... 12
8. Commands Description .......................................................................................................................... 14
8.1. System Diagnosis Commands – ID, IV, IS, SR, RS .............................................................................. 14
8.1.1. ID Get Device Identity ................................................................................................................................... 14
8.1.2. IV Get Firmware Version ............................................................................................................................... 14
8.1.3. IS Get Device Status ..................................................................................................................................... 14
8.1.4. SR Reset LDU XX.X Firmware ....................................................................................................................... 14
8.1.5. RS Read Serial Number ................................................................................................................................. 14
8.2. Calibration Commands – CE, CM n, CI, MR, DS, DP, CZ, CG, ZT, FD, IZ, ZR, ZI, WT, TM, CS ......... 15
8.2.1. CE Read TAC* Counter / Open Calibration Sequence .................................................................................. 15
8.2.2. CM n Set Maximum Output Value .................................................................................................................. 15
8.2.3. CI Set Minimum Output Value ....................................................................................................................... 15
8.2.4. MR Set Multi-range / Multi-interval ................................................................................................................. 15
8.2.5. DS Set Display Step Size ............................................................................................................................... 16
8.2.6. DP Set Decimal Point Position ....................................................................................................................... 16
8.2.7. CZ Set Calibration Zero Point ........................................................................................................................ 16
8.2.8. CG Set Calibration Gain (Span) ..................................................................................................................... 16
8.2.9. ZT Enable / Disable Zero Tracking ................................................................................................................. 16
8.2.10. FD Reset to Factory Default Settings ............................................................................................................. 17
8.2.11. IZ Correction of System Zero ........................................................................................................................ 17
8.2.12. ZR Zero Range .............................................................................................................................................. 17
8.2.13. ZI Initial Zero Range ...................................................................................................................................... 17
8.2.14. WT Warm-up time .......................................................................................................................................... 17
8.2.15. TM Tare mode ................................................................................................................................................ 17
8.2.16. CS Save the Calibration Data ........................................................................................................................ 18
8.3. Motion Detection Commands – NR, NT ................................................................................................. 18
8.3.1. NR Set No-motion Range ............................................................................................................................... 18
8.3.2. NT Set No-motion Time Period ...................................................................................................................... 18
8.4. Filter Setting Commands – FM, FL, UR ................................................................................................. 19
8.4.1. FM Filter Mode ............................................................................................................................................... 19
8.4.2. FL Filter Settings ............................................................................................................................................ 19
8.4.3. UR Update Rate and Averaging ..................................................................................................................... 20