Replacing The Unit - Omron CS1W-SLK11-21 - 06-2004 Manual

Replacing the Unit

9-1 Replacing the Unit
Note
9-1-1 Settings after Replacement
Note
9-1-2 Resetting Network Parameters
1,2,3...
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Observe the following precautions when replacing the Unit.
• Always turn OFF the power before replacing the Unit.
• Check that the new Unit is not faulty.
• If you suspect that a poor connection is the cause of a 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 repairs, always attach a detailed fault
report to the Unit and return to you nearest OMRON outlet as listed at the
back of this manual.
(1) To prevent faulty operation be sure to turn OFF the power to all nodes be-
fore replacing the Unit.
(2) When replacing the Unit, do not reconnect that node to the Network be-
fore carrying out the procedures listed below. In particular, a node with a
small address will become the polling node and communicate the initial
network parameter status to other nodes, so there is the chance that net-
work parameters in the entire Network will be damaged.
After replacing a SYSMAC LINK Unit, reset the hardware switches, software
switches, and data link tables, and wire it in the same manner as the previous
Unit. This section describes settings that require particular care. Refer to the
Unit replacement methods later in this section for details on replacing the Unit.
(1) After replacing the CPU Unit, transfer important data, such as DM and
Holding Area contents, to the new CPU Unit before restarting operation.
Depending on the program, accidents can occur as a result of incorrect
DM or Holding Area contents.
(2) CS-series SYSMAC LINK Units store data such as data link tables, net-
work parameters, and routing tables in the CPU Unit. When replacing the
CPU Unit, reset these settings using the CX-Net in CX-Programmer.
When a CPU Unit has been replaced in a CS-series SYSMAC LINK Unit, it is
necessary to reset the network parameters, data link tables, and routing
tables. This section describes the resetting procedure for the network param-
eters. For details on data link table resetting procedures, refer to 4-5 Creating
Data Links and for routing table resetting procedures, refer to 5-2 Routing
Tables.
1. Network parameters are read from the polling node when the Network is
activated and this information is distributed to all nodes in the Network. For
this reason, set the polled/polling node setting in the DM parameter area
for the node replaced to a polled node before reconnecting the Unit to the
SYSMAC LINK Network.
DM 30000 + 100 × n
n = Unit number
−: Other settings
2. Turn the power OFF once, connect the SYSMAC LINK Network and turn
the power ON again. Check that the Unit is participating in the Network.
Polled node/polling node 0: Polling node
1: Polled node
Section 9-1