eWON General Reference Guide - Esco Drives & Automation

General Reference GuideIO Servers ConfigurationFigure 91: eWON IO server default parameters5.10.2.2.1 ENERGY TAGSThe following tags are available for energy management:LI1..LI8ST1..ST4Latched inputWhen the Integration Period expires, the number of pulses counted during the integrationperiod are logged in the corresponding LIx.Status variables:ST1Latch time - 0x30000000ST2Period statusThis is the absolute time when counter were latched.Expressed in seconds since 1/1/1970 minus 0x30000000 HEX (or 805306368 decimal).This huge value is substracted to maintain precision in the Float storage. (*)0 means period is valid (within tolerance), 1 means period is invalid.ST3Period length secLength of the period in second.ST4Period NumThis 32 bit counter counts is increased by 1 after each integration period. It can be used withONCHANGE to perform operations when period expires.REM1: Energy tags are logged after each new period IF Logging is enabled, even if the value has not changed since previous period.REM2: Even if Deadband is -1 and Interval is 0. If not, you will have additional points and even maybe duplicate points.(*) Important: See “Tags are stored as Float” on page 675.10.2.2.2 32 BIT COUNTER TAGS:The eWON IO Server provides now 8 32 bits (*) counter tags named: CI1..CI8. These counters are writable but writing in these registers affectsthe LIx inputs of the Energy IO server module.(*) Important: See “Tags are stored as Float” on page 67RG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 120