Series 2000 Communications Handbook - Soliton

Series 2000 Communications HandbookModbus and EIBisynch Advanced Topics7.5. TIME TYPE PARAMETERSTime durations are represented as a 32 bit integer number of milliseconds in the IEEE area.When reading and writing to time types, it is necessary to read or write both words in a singleblock read or write. It is not possible, for example, to combine the results of two single wordreads.The data representation is as follows.Lower Modbus AddressHigher Modbus AddressMSB LSB MSB LSBBits 31 - 24 Bits 16 - 23 Bits 15 - 8 Bits 7 - 0To create a 32 bit integer value from the two Modbus values, simply multiply the value at thelower Modbus address by 65536, and add the value at the Higher address. Then divide by1000 to obtain a value in seconds, 60000 for a value in minutes, etc.For example, the value of 2 minutes (120000 mS) is represented as follows:Lower Modbus AddressHigher Modbus AddressMSB LSB MSB LSB00 01 D4 C0Series 2000 Communications Handbook Part No HA026230 Issue 2.0 Feb-00 7-5