User manual

IEC61131 User and Reference Manual

April 22, 2008

591

Module

Start

End

DF1 Address

Range

DIN Controller digital inputs

10017

10019

257/0 to 257/2

DIAG Force LED

10020

257/3

SCADAPack AOUT module

40001

40002

10511 to 10512

Accessing the I/O Database Using ISaGRAF

ISaGRAF programs access the I/O database through function blocks. The function blocks in

ISaGRAF may use the Modbus addressing scheme when a Network Address is defined for a

variable. Refer to the IEC 61131 User Manual for details.

C language programs access the I/O database with two functions. The dbase function reads

a value from the I/O database. The setdbase function writes a value to the I/O database.

These functions use either Modbus or DF1 physical addressing. Refer to the IEC 61131

User Manual for full details on these functions.