Replacing The Unit; Replacement Precautions; Setting The Unit After Replacement; Addition/Replacement Of Units On The Profibus Network - Omron CS1W-PRM21 Operation Manual

Replacing the Unit

7-8

Replacing the Unit

7-8-1

Replacement Precautions

Replacement Precautions
7-8-2

Setting the Unit after Replacement

7-8-3

Addition/Replacement of Units on the PROFIBUS Network

Connecting /
Disconnecting Stations
Adding a Station
The PROFIBUS-DP Master Unit is a Network device. If the Unit is damaged, it
will effect the entire Network, so always ensure repairs are undertaken imme-
diately. It is recommended to have a spare PROFIBUS-DP Master Unit on
hand so that repairs may be conducted quickly.
Observe the following precautions when replacing the Unit.
• Always turn OFF the power before replacing the Unit.
• Ensure that the new Unit is not faulty.
• If a poor connection is suspected of causing the malfunction, clean the
connectors using a clean, soft cloth and industrial-grade alcohol. Remove
any lint or threads left from the cloth, and remount the Unit.
• When returning a faulty Unit for repair, always attach a detailed fault
report to the Unit and return it to the nearest OMRON dealer.
Note 1. In order to prevent faulty operation be sure to turn off the power to all Mas-
ter and Slave stations before replacing the Unit.
2. When replacing the Unit, do not reconnect it to the Network before carrying
out the procedures listed below.
After replacing a PROFIBUS-DP Master Unit - before re-applying the power -
set the unit number to the same unit number as the previous Unit.
After re-applying the power, the configuration settings, present in the previous
Unit, must also be transferred to the new Unit. There are two methods to
accomplish this.
• Start up CX-Profibus and reload the original project from the stored loca-
tion, and download it to the new Unit.
• Use a Memory Card to store the all the Unit's settings, before replace-
ment, and restore it to the new Unit after replacement.
After configuring the new Unit, re-connect it to the network, and restart opera-
tion.
The PROFIBUS-DP network allows to connect and disconnect stations while
in operation.
Connecting / disconnecting any station in a PROFIBUS-DP network is liable
to result in a temporary increase of the communication cycle time. An existing
slave station can only be replaced by the same type of station with the same
configuration. Any change to this configuration is likely to require a new con-
figuration. Changing a station with a different station (type and/or configura-
tion) will have a significant influence on the performance on the PROFIBUS
network.
The addition of a new station to an existing configuration will require a new
configuration file to be downloaded in the PROFIBUS-DP Master Unit, which
will temporarily disable all communication by this Unit on PROFIBUS.
Section 7-8
145