Quickstart 750-881 - Wago

WAGO-I/O-SYSTEM 750 Application example: Starterkit881_App1_FUP.pro 39750-881 ETHERNET Programmable FieldbusThe function "START_FLASHING_SEQUENCE" starts the sequences setpreviously using the function "SET_FLASHING_SEQUENCE." Index 0 (USR-LED = green) is executed first, as the variable "wIndex" was initialized with thisvalue in the variable declaration.Figure 40: Network 4 (USR-LED)Clicking the visualization button [USR-LED] increases the value of "wIndex" by"1" (from 0 to a maximum of 3).To accomplish this, the variable "xVisuUserLed" for the visualization button[USR-LED] is initially processed via flank detection "ftrigVisuUserLed" and thenevaluated as follows via selection (SEL):• If "ftrigVisuUserLed.Q" = TRUE, the selection result is `1’.• If "ftrigVisuUserLed.Q" = FALSE, the selection result is `0’.This result is subsequently added to the value of "wIndex" (ADD), then comparedto the value "3" (GT = greater than) and finally evaluated as follows via selection:• If the addition result is greater than "3", then "wIndex" is assigned the value"0".• If the addition result is lower than or equal to "3", then "wIndex" is assignedthe result of this addition.Figure 41: Network 5 (USR-LED)Quickstart ReferenceVersion 1.1.0