Modbus Protocol for ION 7500, ION 7600 and ION 8000 series
Modbus Protocol for ION 7500, ION 7600 and ION 8000 series
Modbus Protocol for ION 7500, ION 7600 and ION 8000 series
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<strong>Modbus</strong> Register MapAppendix D: <strong>Modbus</strong> Meter Time SetAppendix D: <strong>Modbus</strong> Meter Time SetThis appendix contains the <strong>Modbus</strong> Meter UNIX Time Set function of <strong>ION</strong> meters.<strong>Modbus</strong> Meter Time SetUnix Time (UTC) Seconds is an unsigned 32-bit value stored in two <strong>Modbus</strong>registers. The first register is the high order followed by the low order secondregister. Consult the online <strong>ION</strong> Programmer’s Reference <strong>for</strong> a description of theClock Module time <strong>for</strong>mat.UTC microseconds is an unsigned 32-bit value stored in two <strong>Modbus</strong> registers.The first register is the high order followed by the low order second register. The<strong>for</strong>mat is absolute time in MicroSeconds.Only resolution by seconds is supported when setting Meter Time via <strong>Modbus</strong>.<strong>Modbus</strong> Register# of <strong>Modbus</strong>RegistersDescription Format Properties41926 2 UTC Seconds UINT32 Read / Write41928 2 UTC microseconds UINT32 Read<strong>Modbus</strong> Time SetTo set the Meter time via <strong>Modbus</strong> communications do the following:1. Set the <strong>ION</strong> Clock Module Time Sync Source Register to the <strong>Modbus</strong> communicationsport.2. Write the UNIX time in seconds as an unsigned 32-bit value to <strong>Modbus</strong> Registers41926 (high order) <strong>and</strong> 41927 (low order).Page 51
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