Prosoft-technology PS69-DPS User Manual download pdf (Page 52)

RSLogix Example Program PS69-DPS ♦ CompactLogix or MicroLogix Platform

User Manual Profibus DP Slave Communication Module

Page 52 of 108 ProSoft Technology, Inc.

May 9, 2014

3.2 CompactLogix Messaging Example

This ladder logic program is a CIP messaging example for the setup of the

PROFIBUS-DP Slave communications module "PS69-DPS" in RSLogix5000.

This example can be used to start a project when using a CPU 1769-L32, which

supports CIP messaging. Basic PROFIBUS I/O data exchange and all

messaging function examples are shown. Details on the Subroutines created and

the User Defined Data Types are as follows.

 MainRoutine: The MainRoutine calls all of the following routines based on

conditions such as doing a diagnostic request or to check the progress of

each individual DPV1 function issued by the Master. This routine also

contains a simple I/O transfer function block.

 Diagnostic_Req: This subroutine Diagnostic_Req assembles a Diagnostic

Request message which will be sent to the Master. A CIP Generic Message

is used to send this message.

 Diagnostic_Req_Progress: This subroutine Diagnostic_Req_Progress

checks the status of the diagnostics request message sent to the Master.

When the Diagnostic request is done it will increment a status counter to

check how many requests have been send successfully and how many failed.

 DPV1C1_Alarm_Req: This subroutine DPV1C1_Alarm_Req assembles a

DPV1 Alarm message which will be sent to the Master. A CIP Generic

Messages is used to send this message.

 DPV1C1_Alarm_Req_Progress: This subroutine

DPV1C1_Alarm_Req_Progress checks the status of the Alarm request

message sent to the Master. When the Alarm request is done it will increment

a status counter to record how many requests have been send successfully

and how many have been failed.

 DPV1C1_Progress: This subroutine DPV1C1_Progress checks the

inprogress bit of each service and sends the appropriate response. CIP

Generic Messages are used to send the response message from the Slave to

the Master.

 DPV1C1_Read_Resp: This subroutine DPV1C1_Read_Resp assembles the

DPV1 Read response message. A CIP Generic Message is used to send this

message. This routine will return immediately if there is still a DPV1 Read

Response in progress.

 DPV1C1_Read_Resp_Progress: This subroutine

DPV1C1_Read_Resp_Progress checks the status of the DPV1 Read

Response sent to the Master. When the Read response request is done it will

increment a status counter to record how many response requests have been

sent successfully and how many failed.

 DPV1C1_Write_Resp: This subroutine "DPV1C1_Write_Resp" assembles

the DPV1 Write response message. A CIP Generic Message is used to send

this message. This routine will return immediately if there is still a DPV1 Write

Response in progress.

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