Omron CJ Series User Manual

3-43
3 Configuration Software
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
3-3 Generic Slave Device DTM
3
3-3-1 Configuration User Interface
 Fail-Safe behavior
The Fail-Safe behavior box defines whether or not the PROFIBUS Master Unit will in CLEAR mode
send an empty output data message to the slave device or a data message containing zeros.
Depending on the slave device, an empty data message, may be required, if the slave device per-
forms user specific functions in CLEAR mode, and during which the outputs can not be set to zero.
Note If the selected setting is not supported by the slave device, a parameter error will be returned
by the device.
 Error on Cyclic Data Exchange
The Error on Cyclic Data Exchange settings box, defines the behavior of the PROFIBUS Master
Units on the PROFIBUS network with respect to this particular slave device, in case it fails to
respond during I/O data exchange. Depending on the setting, the Master Unit will either continue
sending I/O data exchange messages to the slave device or abort I/O data exchange and continue
with requesting the slave diagnostics data. When continuing sending I/O data exchange data the
slave’s diagnostics data will not be updated.
Note A slave’s failure to respond during I/O data exchange will always be reported to the CPU, by
resetting the corresponding Slave Data Exchange Active flags in the CPU memory (see sec-
tion 4-2-8 Slave Data Exchange Active Flags (*_SlvDatXchg, *_SlvDatXchgL,
*_SlvDatXchgH)). If Auto-CLEAR has been enabled, the failure to respond will result in the
PROFIBUS Master Unit switching to CLEAR mode, based on this device variable flag.
 Diagnostics Update Delay
The Diagnostics Update Delay defines the number of PROFIBUS DP cycles during which the PRO-
FIBUS Master Unit will ignore diagnostics message returned from the slave containing the Prm_Req
flag. This flag indicates that the Master Unit should re-parameterize the slave, but in the case of
reduced performance of the slave devices, the returned flag also indicates that the slave device is
still processing the last received parameter message and has as yet not approved nor rejected that
message.
During the Diagnostics Update Delay period the PROFIBUS Master Unit will continue requesting its
diagnostics data. Also during this period, the diagnostics data received from this slave will not be
updated in the CPU.
EN50170 Compliant The Check I/O configuration message will contain standard PROFIBUS DP Data type definitions as
well as vendor specific data types and the slave device will perform the check on this assumption.
Control Description
Send zeros in Clear
mode
When in CLEAR mode, the PROFIBUS Master Unit will send a full output data message to the slave
device, but the message will contain all zeros.
Send no data in Clear
mode
When in CLEAR mode, the PROFIBUS Master Unit will send an empty output data message (i.e. no
data bytes, only the message header) to the slave device.
Control Description
Continue if slave not
responding
The PROFIBUS Master Unit will continue to send I/O data exchange messages, when the slave
device fails to respond. The diagnostics data of the slave will not be updated.
Abort if slave not
responding
The PROFIBUS Master Unit will abort the data exchange with the slave device, and continue to send
diagnostics request message to the slave, until it responds. The diagnostics data of the slave will be
updated accordingly.
Control Description

Omron CJ Series Specifications

General

Brand	Omron
Model	CJ Series
Category	Controller
Language	English