Download Communication Protocol 4 LD 9 LD - keller

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Introduction ............................................................................................................................................................................ 3
2 Electrical Interface ................................................................................................................................................................. 3
2.1 Pinout .................................................................................................................................................................................... 3
2.2 Pull-up Resistors ................................................................................................................................................................... 4
2.3 Bit Rate ................................................................................................................................................................................. 4
2.4 Bus Capability ....................................................................................................................................................................... 5
3 Data Frame.............................................................................................................................................................................. 6
3.1 START and STOP Condition ................................................................................................................................................ 6
3.2 ADDRessing.......................................................................................................................................................................... 6
3.3 ACKnowledge ....................................................................................................................................................................... 7
3.4 STATUS Byte........................................................................................................................................................................ 7
3.5 DATA Bytes........................................................................................................................................................................... 7
4 Get Measurement Data .......................................................................................................................................................... 8
4.1 Get the digital Values ............................................................................................................................................................ 8
4.2 Interpretation of the digital Values......................................................................................................................................... 8
4.3 Variants to detect the End Of Conversion........................................................................................................................... 10
4.4 Voltage-Time-Diagrams ...................................................................................................................................................... 11
5 Optional further Commands ............................................................................................................................................... 12
5.1 Memory-Map of User Information ....................................................................................................................................... 12
5.2 Recommended Slave Addresses........................................................................................................................................ 14
5.3 Changing the Slave Address............................................................................................................................................... 15
6 K-404 User Manual ............................................................................................................................................................... 16
6.1 USB-to-I2C Dongle ............................................................................................................................................................. 16
6.2 PC Application to change the Slave Address...................................................................................................................... 18
7 Appendix............................................................................................................................................................................... 23
7.1 Code Examples................................................................................................................................................................... 23
7.2 Application Notes ................................................................................................................................................................ 25
7.3 Protocol Changes................................................................................................................................................................ 25
7.4 Firmware Versions .............................................................................................................................................................. 25
7.5 Support................................................................................................................................................................................ 25
Communication Protocol 4 LD ... 9 LD
Version 2.4 hof 2. June 2014
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