Festo CECX-X-C1 Series, Manual

Page: 522 / 631

The Festo_EasyIP.lib library
4
1.3 Communication functions
1.3.1 Functions for communicating via EasyIP
Communication with the remote stations entered in the IP table can be established directly from the IEC
program using the following communication functions. The index (shortcut) from the IP table at which the
IP address was entered is used to select the remote station instead of the IP address of the remote station.
Overview
Functions Description
Easy_S The function sends an EasyIP package to an EasyIP station.
Easy_R The function sends a request to a station.
Easy_SR The function sends data and a request to an EasyIP station.
1.3.2 Easy_S
Sends an EasyIP telegram containing data to a remote station.
Input variable Data type Description
TableIndex WORD Index in the IP shortcut table. Permitted range of values
0...31 (constant MAXIPTABLEINDEX).
OpType WORD Operand type. Refer to the table "Supported operand
types" for a list of available operands.
NumToSend WORD Number of data words to send (16-bit). Permitted range of
values 0...255, for operand type string
(STRI1)/2.
OpOffLoc WORD Offset in the local EasyIP memory, index in the string table
for strings.
OpOffRem WORD Target offset EasyIP memory of the remote station, index
in the string table for strings.
Status INT -1 = Send without confirming, no timeout.
> -1 = Offset in the flag area (%MWx) where the
communication status is saved (see Communication status
table).
Output variable Data type Description
Easy_S WORD 0 = Processing was successful.
> 0 = Error code (see Error code table).