WAGO I/O SYSTEM 750 Series Manual

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WAGO-I/O-SYSTEM 750 Process Image 25753-456 2 AI ±10 V DC, Differential inputsManualVersion 1.2.0Pos : 20 /All e Seri en (Allgemei ne Module)/Ü berschriften/Ebene 1/Prozes sabbild - Ü berschrift 1 @ 4\mod_1240983067828_21.doc x @ 31942 @ 1 @ 14 Process ImagePos : 21 /Serie 750 ( WAGO-I/O-SYST EM)/Proz ess abbild Kl emmenbus /Hinweis: Prozes sabbildmapping abhängig von FBK/PFC, mit Status-/C ontroll byte @ 4\mod_1242621308640_21.doc x @ 33290 @ @ 1Mapping of process data in the process image of fieldbus systemsThe representation of the I/O modules’ process data in the process image dependson the fieldbus coupler/controller used. Please take this information as well as theparticular design of the respective control/status bytes from the section “FieldbusSpecific Design of the Process Data” included in the description concerning theprocess image of the fieldbus coupler/controller used.Pos : 22 /Serie 750 ( WAGO-I/O-SYST EM)/Proz ess abbild Kl emmenbus /Hinweis: Status byte-Aus wertung abhängig vom Fel dbuss ystem @ 6\mod_1256127208766_21.doc x @ 43344 @ @ 1Evaluation of Status ByteSome fieldbus systems can process status information of process value by meansof a status byte.This status byte can be displayed via the commissioning tool WAGO-I/O-CHECK.However, processing via the fieldbus coupler/controller is optional, which meansthat accessing or parsing the status information depends on the fieldbus system.Pos : 23 /Serie 753 ( WAGO-I/O-SYST EM)/Proz ess abbild Kl emmenbus /AI/Pr oz ess abbild 753- 0456 @ 29\mod_1498055241293_21.doc x @ 425250 @ @ 1The analog input module 753-456 transmits 16-bit measured values and 8 statusbits (optional) per channel.The digitalized measured value is transmitted to the process image of thecoupler/controller in a data word (16 bits) as an input byte 0 (low) and input byte1 (high).This value is mapped with a resolution of 12 bits to bit B3 … B14 plus the sign tobit 15.From production number 3202XXXX, the three least significant bits B0 … B2contain status information that can be evaluated for fault detection. In the eventof an overrange, bit B0 = 1 is set.For I/O modules with an earlier production number, the last 3 bits are notevaluated.The production number is printed on the side of the I/O module housing.The hexadecimal and decimal measured values in the table are given on theassumption that the first two bits have the status “0”.If status “1” is taken into consideration for both bits, the decimal measured valueis higher than in the table by a value of 3.