ABB SAFT112POW Channel input module

The program for axis 1 waits for a one-to-zero transition of its discrete input 1 before initiating a ten turn incremental move. Similarly, axis 255 waits for the same transition to initiate a 20 turn incremental move. The program in axis 255 indicates that it is looking at an input to axis 1 by using the variable name “INP1[1].” The bracketed “1” is a call to PacLAN to fetch the data from axis 1 over the network. The network is also used to insure that both axes are in position before another move can be initiated.This document describes about Models ALR111 and ALR121 Serial Communication Modules (for FIO) that a field control station (FCS) uses to perform serial communication with subsystems such as FA-M3. These serial communication modules can be mounted on field control units (AFV30, AFV40, AFV10, and AFF50), ESB bus node unit (ANB10), optical ESB bus node unit (ANB11), and ER bus node unit (ANR10).

An FCS collects data from subsystems

sets data with control calculations to subsystems using the builder functions by way of serial communication modules. A communication module selects only one communication function, thus two ports must have identical communication functions. It is not possible to select different communication function for every port. The communication functions and those transmission speeds for each communication module are as shown in the table below.The serial communication module communicates with subsystems at the specified intervals and stores the subsystem data in the communication modules’ I/O image area. FCS accesses the communication module asynchronously from them, and refers to or sets the I/O images. This enables FCS to use the subsystem data through the I/O terminals of the function block in the same way as the general analog and digital I/O signals.

 Modbus Communication 

Connected device: Serial transmission interface module Connection method: Connect an ALR111 or ALR121 module communication port with serial transmission interface module Applicable devices: By Yokogawa - STARDOM FCN, FCJ, and GC1000 Mark II (*1) By Schneider Electric - Modicon484, 584, 584L, 884, 984, 984A, 984B, 984X, and Micro 84 By Yasukawa Electric - Memocon-SC U84, 584, 684H, 694H, R84H-M, GL60S, and GL20 Transmission protocol: Modbus protocol (RTU mode) No. of subsystem stations: Max. 30 stations/port *1: The communication with GC1000 Mark II is enabled via ASGW, and the number of port available for communication is one.

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