Omron CJ Series User Manual

5-57
5 Operation
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
5-8 PROFIBUS DP-V1 Services
5
5-8-1 Configuring and Monitoring Slaves using DTMs
5-8 PROFIBUS DP-V1 Services
Next to the cyclic I/O data exchange, the CJ1W-PRM21 PROFIBUS Master Units are capable of com-
municating using acyclic DP-V1 messages. The following section explains the basic operation of DP-V1
functionality.
The FDT/DTM framework enables the configuration and monitoring of specific parameters of PRO-
FIBUS slaves. The DTMs support sending PROFIBUS DP-V1 Class 1 (MSAC1) and Class 2
(MSAC2) messages directly to the slaves. The slave DTMs, provided by the Slave’s manufacturer,
can therefore perform application related configuration and monitoring.
Note The CJ1W-PRM21 master (communication) DTM will determine which connection is initiated
with the slave Unit. The default connection is PROFIBUS DP-V1 Class 2. If this is not sup-
ported by the slave, PROFIBUS DP-V1 Class 1 messages will be sent.
Precautions for Safe Use
Since using PROFIBUS DP-V1 Class 2 messages are by definition aimed at setting parameters
in a slave device. It is highly recommended to make those settings with the PROFIBUS Master
Unit in CLEAR mode to prevent undesirable effects on I/O data.
As an example, the figure below shows the DTM of the GRT1-PRT PROFIBUS Communication for
SmartSlice I/O Units (see Operation Manual W04E-EN-
□). The DTM is used to configure and moni-
tor the GRT1-Series SmartSlice I/O Units.
5-8-1 Configuring and Monitoring Slaves using DTMs
CJ1W-
PRM21 DTM
CJ1W-
PRM21 Unit
Read Request Acyclic Read Request Acyclic Read Request
Acyclic Read Response
PROFIBUS
CX-Server
Read
Response
Acyclic Read
Response
PROFIBUS
Slave DTM
PROFIBUS
Slave Unit

Omron CJ Series Specifications

General

Brand	Omron
Model	CJ Series
Category	Controller
Language	English