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Overview Section 6-1
6-1-5 Message Communications Error Indications
There are two ways to obtain information on communications errors that occur
in message communications: 1) Using the error history in the DeviceNet Unit
and 2) Using DeviceNet Unit displays, indicators, and Master Status Areas.
1,2,3... 1. Each time a communications error occurs, an error code is placed in an er-
ror record in the error history kept in the RAM of the DeviceNet Unit. Up to
64 records can be stored in the error history. The time and data the record
occurred is also recorded.
The error history can be read or cleared from the CPU Unit by sending an
FINS command to the DeviceNet Unit (Error History Read/Clear). The con-
tents of the error history can also be monitored from the Configurator.
2. The MS and NS indicators and the 7-segment display on the front panel of
the DeviceNet Unit can be used together with the Master Status Area 1 in
the CPU Unit to obtain information on a communications error that has oc-
curred. This information can be used as the basis for troubleshooting.
Response monitoring time Default setting: 2 s
User setting: 0.1 to 6553.5 s
Retries 0 to 15
FINS mes-
sage com-
munications
commands
Received from CS/CJ-
series CPU Unit with CS/
CJ-series DeviceNet Unit
Supported (Data send/receive or FINS commands).
Received from CVM1/CV-
series CPU Units with
CVM1/CV-series DeviceNet
Master Unit
Not supported.
Received from CS/CJ-
series and C200HX/HG/HE
CPU Units with C200H-
series DeviceNet Master
Unit
Received from C200HX/HG/
HE Units with C200H-series
DeviceNet Master Unit
Internetwork connections Same net-
work type
Supports internetwork communications between DeviceNet networks with
CS/CJ-series DeviceNet Units mounted (up to 3 levels).
Different net-
work type
Supports internetwork communications between DeviceNet networks with
CS/CJ-series DeviceNet Units mounted and other networks (Controller
Link, SYSMAC LINK, and Ethernet; up to 3 levels).
Message monitor timer function (explicit
message communications)
The response monitoring time for DeviceNet Units during explicit message
communications (the interval the explicit connection is open) can be set
from the Configurator for each device. (The settings for all devices can be
stored in the DeviceNet Unit. This is called the Message Monitoring Timer
List.)
Item Specification
CPU Unit
Configurator
FINS command
Read-out
Monitor
Code
Code
Code
64 records