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The ION 75xx RTU reads -1 for all external numeric registers and will not save any changes after a register write

The ION 75xx RTU units do not come with predefined framework on the meters. Use ION Setup or ION Designer to create external numeric modules and unlock the registers. Once the module has been created the register will read 0 instead of -1.

Last Revised: April 17, 2008
Applies To: ION 7500 / 7550 RTU
Original Author: MN
All content © 1992-2008 Schneider Electric

Legacy KB System (APS) Data: RESL191710 V1.0, Originally authored by KBAdPM on 04/18/2008, Last Edited by KBAdPM on 04/18/2008
Related ranges: ION75X0 RTU
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