execute i f internal ram 0x26.6 on cpu 8032 clear. if(CPU.IRAM[0x26].6 = 0){word TIMER_MODE = 0x0000; word TIMER _ADDRESS = 0xEC00; word TIMER_DATA = 0x0000 Title: SIMATIC S5-115U System Manual CPU941-944 6ES5998-0UF23_e Author: SIEMENS Created Date: 5/27/2018 1:45:54 PM A good starting point for you wouldbe page 159 (chapter 6.4) in the english S5-115U Programmable Controller manual, where you find a overview listof all System data words together with a referencetothe section that has more details on them. ***Spare part*** SIMATIC S5, Digital input 430 Isolated for S5-115U/F 32 inputs 24 V DC Product family: Not available: Product Lifecycle (PLM) PM490:Start of final year of support: PLM Effective Date: Product discontinued since: 01.10.2020: Notes